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    <title language="eng">Structure-property relationships of hyperbranched polymer/kaolinite nanocomposites</title>
    <abstract language="eng">Two methods were employed to prepare hyperbranched polyamine ester (HPAE)/kaolinite (Ka) nanocomposites resulting in different morphologies. In the case of the in situ polymerization, diethanolamine is inserted as monomer between the Ka layers and polymerized with methyl acrylate to prepare HPAE/Ka–DEA nanocomposites. For the ex situ method, Ka is modified with dodecylamine and solution-blended with HPAE. The former method leads to an intercalated morphology where the latter approach results in an exfoliated structure, as proofed by SAXS and TEM. A complementary combination of methods like differential scanning calorimetry (DSC), broadband dielectric relaxation (BDS), and specific heat spectroscopy (SHS) was used to investigate both kinds of nanocomposites in detail. Above Tg, the dielectric spectra are dominated by the conductivity contribution while the segmental dynamics is retrieved by SHS. A comparison of the temperature dependencies reveals a decoupling of segmental dynamics and conductivity, which becomes weaker with decreasing fragility.</abstract>
    <parentTitle language="eng">Macromolecules</parentTitle>
    <identifier type="old">37555</identifier>
    <identifier type="doi">10.1021/acs.macromol.5b01693</identifier>
    <identifier type="issn">0024-9297</identifier>
    <identifier type="issn">1520-5835</identifier>
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    <author>Shereen Said Shabaan Omara</author>
    <author>M.H.A. Rehim</author>
    <author>A. Ghoneim</author>
    <author>Sherif Aly Hassan Aly Madkour</author>
    <author>Andreas Thünemann</author>
    <author>G. Turky</author>
    <author>Andreas Schönhals</author>
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    <issue/>
    <volume>121</volume>
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    <title language="eng">Hyperbranched poly(amidoamine)/kaolinite nanocomposites: Structure and charge carrier dynamics</title>
    <abstract language="eng">An ex-situ approach was applied to prepare nanocomposites from hyperbranched poly(amidoamine) and modified kaolinite (Ka-DCA). The structure of the polymer and the corresponding nanocomposites was investigated by FTIR, DSC, SAXS and TEM. SAXS might suggest a partly exfoliated structure of the nanocomposites, which was supported by TEM. The molecular dynamics was studied by means of broadband dielectric spectroscopy (BDS). The dielectric spectra are dominated by a conductivity &#13;
contribution at higher temperatures for all samples investigated. The obtained results further indicated that DC conductivity is increased by 4 orders of magnitude with increasing concentration of Ka-DCA nanofiller. Further, a significant separation between the conductivity relaxation time and that of segmental dynamics was observed. The decoupling phenomenon and the conductivity mechanism were discussed in detail. This study provides insights about the influence of the nanofiller on the structure and the conductivity contribution of nanocomposites of hyperbranched polymers including the decoupling phenomenon and fragility.</abstract>
    <parentTitle language="eng">Polymer</parentTitle>
    <identifier type="doi">10.1016/j.polymer.2017.06.017</identifier>
    <identifier type="issn">0032-3861</identifier>
    <enrichment key="date_peer_review">07.08.2017</enrichment>
    <author>Shereen Shabaan Omara</author>
    <author>G. Turky</author>
    <author>A. Ghoneim</author>
    <author>Andreas Thünemann</author>
    <author>M. H. Abdel Rehim</author>
    <author>Andreas Schönhals</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Hyperbranched polymers</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanocomposites</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Conductivity</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
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    <publishedYear>2025</publishedYear>
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    <language>eng</language>
    <pageFirst>4422</pageFirst>
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    <edition/>
    <issue/>
    <volume>41</volume>
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    <title language="eng">Complex Self-Organization in n-Alkylammonium Sulfobetaine Zwitterions with High Thermal Stabilities and High Expansion Coefficients</title>
    <abstract language="eng">Sulfobetaine zwitterions made from n-alkyl dimethylamines and butanesultone yield a series of n-alkylammonium sulfobetaine zwitterions with complex self-organization behavior. The compounds are thermally quite stable and the length of the alkyl chain directly affects all phase transition temperatures of the compounds: the longer the alkyl chain, the higher the transition temperature. All compounds exhibit lamellar order and the different phases are characterized by a lower temperature orthorhombic and a higher temperature hexagonal in-plane order. The phase transition from the orthorhombic to the hexagonal phase is always associated with an increase of the long period. The phase transition is also associated with a rather high thermal expansion coefficient.</abstract>
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    <author>Alyna Lange</author>
    <author>Lea Holtzheimer</author>
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    <title language="eng">Synthesis and Characterization of Ultra‐Small Gold Nanoparticles in the Ionic Liquid 1‐Ethyl‐3‐methylimidazolium Dicyanamide, [Emim][DCA]</title>
    <abstract language="eng">AbstractWe report on gold clusters with around 62 gold atoms and a diameter of 1.15±0.10 nm. Dispersions of the clusters are long‐term stable for two years at ambient conditions. The synthesis was performed by mixing tetrachloroauric acid (HAuCl4 ⋅ 3 H2O) with the ionic liquid 1‐ethyl‐3‐methylimidazolium dicyanamide ([Emim][DCA]) at temperatures of 20 to 80 °C. Characterization was performed with small‐angle X‐ray scattering (SAXS), UV‐Vis spectroscopy, and MALDI‐TOF mass spectrometry. A three‐stage model is proposed for the formation of the clusters, in which cluster growth from gold nuclei takes place according to the Lifshitz‐Slyozov‐Wagner (LSW) model followed by oriented attachment to form colloidal stable clusters.</abstract>
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The synthesis was performed by mixing tetrachloroauric acid (HAuCl&lt;jats:sub&gt;4&lt;\/jats:sub&gt;\u2009\u22c5\u20093 H&lt;jats:sub&gt;2&lt;\/jats:sub&gt;O) with the ionic liquid 1\u2010ethyl\u20103\u2010methylimidazolium dicyanamide ([Emim][DCA]) at temperatures of 20 to 80\u2009\u00b0C. Characterization was performed with small\u2010angle X\u2010ray scattering (SAXS), UV\u2010Vis spectroscopy, and MALDI\u2010TOF mass spectrometry. 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Elektrochem."},{"key":"e_1_2_9_49_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp907270x"},{"key":"e_1_2_9_50_1","doi-asserted-by":"publisher","DOI":"10.1021\/nl025836"},{"key":"e_1_2_9_51_1","doi-asserted-by":"publisher","DOI":"10.1021\/cm402139r"},{"key":"e_1_2_9_52_1","doi-asserted-by":"publisher","DOI":"10.1039\/D0NR06541B"},{"key":"e_1_2_9_53_1","doi-asserted-by":"publisher","DOI":"10.1021\/cm202633v"}],"container-title":["ChemistryOpen"],"original-title":[],"language":"en","deposited":{"date-parts":[[2023,10,24]],"date-time":"2023-10-24T10:08:48Z","timestamp":1698142128000},"score":1,"resource":{"primary":{"URL":"https:\/\/chemistry-europe.onlinelibrary.wiley.com\/doi\/10.1002\/open.202300106"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,8,31]]},"references-count":53,"alternative-id":["10.1002\/open.202300106"],"URL":"http:\/\/dx.doi.org\/10.1002\/open.202300106","archive":["Portico"],"relation":{},"ISSN":["2191-1363","2191-1363"],"issn-type":[{"value":"2191-1363","type":"print"},{"value":"2191-1363","type":"electronic"}],"subject":["General Chemistry"],"published":{"date-parts":[[2023,8,31]]},"assertion":[{"value":"2023-06-19","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-08-31","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}</enrichment>
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    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Jana Hildebrandt</author>
    <author>Andreas Taubert</author>
    <author>Andreas Thünemann</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Reference materials</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>SAXS</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Gold</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanoparticle</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Small-angle X-ray scattering</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ionic liquid</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.5 Synthese und Streuverfahren nanostrukturierter Materialien</collection>
    <collection role="themenfelder" number="">Material</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="unnumberedseries" number="">Wissenschaftliche Artikel der BAM</collection>
    <collection role="themenfelder" number="">Advanced Materials</collection>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/58820/Synthesis and Characterization of Ultra_Small.pdf</file>
  </doc>
  <doc>
    <id>23921</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>4342</pageFirst>
    <pageLast>4354</pageLast>
    <pageNumber/>
    <edition/>
    <issue>11</issue>
    <volume>44</volume>
    <type>article</type>
    <publisherName>American Chemical Society</publisherName>
    <publisherPlace>Washington, DC</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Structure - property relationships of nanocomposites based on polypropylene and layered double hydroxides</title>
    <abstract language="eng">Nanocomposites based on polypropylene (PP) and organically modified ZnAl layered double hydroxides (ZnAl-LDH) were prepared by melt blending and investigated by a combination of differential scanning calorimetry (DSC), small- and wide-angle X-ray scattering (SAXS and WAXS), and dielectric relaxation spectroscopy (DRS). An average number of stack size of LDH layers is calculated by analyzing the SAXS data which is close to that of pure organically modified ZnAl-LDH. Scanning microfocus SAXS investigations show that the ZnAl-LDH is homogeneously distributed in the PP matrix as stacks of 4–5 layers with an intercalated morphology. DSC and WAXS results show that the degree of crystallinity decreases linearly with the increasing content of LDH. The extrapolation of this dependence to zero estimates a limiting concentration of ca. 40% LDH where the crystallization of PP is completely suppressed by the nanofiller. The dielectric spectra of the nanocomposites show several relaxation processes which are discussed in detail. The intensity of the dynamic glass transition (β-relaxation) increases with the concentration of LDH. This is attributed to the increasing concentration of the exchanged anion dodecylbenzenesulfonate (SDBS) which is adsorbed at the LDH layers. Therefore, a detailed analysis of the β-relaxation provides information about the structure and the molecular dynamics in the interfacial region between the LDH layers and the polypropylene matrix which is otherwise dielectrically invisible (low dipole moment). As a main result, it is found that the glass transition temperature in this interfacial region is by 30 K lower than that of pure polypropylene. This is accompanied by a drastic change of the fragility parameter deduced from the relaxation map.</abstract>
    <parentTitle language="eng">Macromolecules</parentTitle>
    <identifier type="old">26530</identifier>
    <identifier type="doi">10.1021/ma200323k</identifier>
    <identifier type="issn">0024-9297</identifier>
    <identifier type="issn">1520-5835</identifier>
    <enrichment key="date_peer_review">30.06.2011</enrichment>
    <author>Purv Purohit</author>
    <author>Jesús Huacuja Sánchez</author>
    <author>D.-Y. Wang</author>
    <author>Franziska Emmerling</author>
    <author>Andreas Thünemann</author>
    <author>G. Heinrich</author>
    <author>Andreas Schönhals</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanocomposites</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Layered double hydroxide</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Dielectric spectroscopy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>X-ray scattering</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polypropylene</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>25810</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>2245</pageFirst>
    <pageLast>2254</pageLast>
    <pageNumber/>
    <edition/>
    <issue>11</issue>
    <volume>53</volume>
    <type>article</type>
    <publisherName>Springer</publisherName>
    <publisherPlace>Berlin</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Arrangement of layered double hydroxide in a polyethylene matrix studied by a combination of complementary methods</title>
    <abstract language="eng">Organically modified ZnAl Layered Double Hydroxides (ZnAl-LDH) was synthesized and melt blended with polyethylene to obtain nanocomposites. The resulting morphology was investigated by a combination of Differential Scanning Calorimetry (DSC), Small and Wide-angle X-ray scattering (SAXS and WAXS) and dielectric relaxation spectroscopy (DRS). The arrangement (intercalation) of polyethylene chains between LDH stacks was investigated employing SAXS. The homogeneity of the nanocomposites and average number of stack size (4–6 layers) were determined using scanning microfocus SAXS (BESSY II). DSC and WAXS results show that the degree of crystallinity decreases linearly with the increasing content of LDH. The extrapolation of this dependence to zero estimates a limiting concentration of ca. 45% LDH where the crystallization of PE is completely suppressed by the nanofiller. The dielectric spectra of the nanocomposites show several relaxation processes which are discussed in detail. The intensity of the dynamic glass transition (β-relaxation) increases with the concentration of LDH. This is attributed to the increasing concentration of the exchanged anion sodium dodecylbenzene sulfonate (SDBS) which is adsorbed at the LDH layers. Therefore, a detailed analysis of the β-relaxation provides information about the structure and the molecular dynamics in the interfacial region between the LDH layers and the polyethylene matrix which is otherwise dielectrically invisible (low dipole moment).</abstract>
    <parentTitle language="eng">Polymer</parentTitle>
    <identifier type="old">28540</identifier>
    <identifier type="doi">10.1016/j.polymer.2012.03.041</identifier>
    <identifier type="issn">0032-3861</identifier>
    <identifier type="issn">1873-2291</identifier>
    <enrichment key="date_peer_review">07.05.2012</enrichment>
    <author>Purv Purohit</author>
    <author>D.-Y. Wang</author>
    <author>Franziska Emmerling</author>
    <author>Andreas Thünemann</author>
    <author>G. Heinrich</author>
    <author>Andreas Schönhals</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Dielectric spectroscopy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polyethylene nanocomposites</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Layered double hydroxides</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>33257</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>338</pageFirst>
    <pageLast>354</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>68</volume>
    <type>article</type>
    <publisherName>Elsevier</publisherName>
    <publisherPlace>Oxford</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Structure-property relationships of nanocomposites based on polylactide and MgAl layered double hydroxides</title>
    <abstract language="eng">Nanocomposites based on poly(ʟ-lactide) (PLA) and organically modified MgAl Layered Double Hydroxides (MgAl-LDH) were prepared by melt blending and investigated by a combination of Differential Scanning Calorimetry (DSC), Small- and Wide-Angle X-ray Scattering (SAXS, WAXS), and dielectric spectroscopy (BDS). Scanning microfocus SAXS investigations show that the MgAl-LDH is homogeneously distributed in the matrix as stacks of 6 layers and/or partly exfoliated layers. DSC and WAXS show that the degree of crystallinity decreases linearly with the content of LDH. The extrapolation of the dependencies (DSC and WAXS) to zero estimates a limiting concentration of LDH CCri of ca. 21 wt% where the crystallization of PLA is completely suppressed by the nanofiller. The dielectric behavior of neat PLA show two relaxation regions, a β-relaxation at low temperatures related to localized fluctuations and the α-relaxation at higher temperatures due to the dynamic glass transition. The dielectric spectra of the nanocomposites show several additional relaxation processes compared to neat PLA which are discussed in detail. For the nanocomposites around 260 K (ƒ = 1 kHz) an additional process is observed which intensity increases with increasing concentration of LDH. This process is mainly attributed to the exchanged dodecylbenzene sulfonate (SDBS) molecules which are adsorbed at the LDH layers and form a mixed phase with the polymer close to the layers and stacks. An analysis of this process provides information about the molecular dynamics in the interfacial region between the LDH layers and the PLA matrix which reveal glassy dynamics in this region. In the temperature range around 310 K (ƒ = 1 kHz) a further process is observed. Its relaxation rate has an unusual saddle-like temperature dependence. It was assigned to rotational fluctuations of water molecules in a nanoporous environment provided by the LDH filler. Above the glass transition temperature a further process is observed at temperatures above. It is related to Maxwell/Wagner/Sillars polarization due to the blocking of charges at the nanofiller.</abstract>
    <parentTitle language="eng">European polymer journal</parentTitle>
    <identifier type="old">36346</identifier>
    <identifier type="doi">10.1016/j.eurpolymj.2015.05.008</identifier>
    <identifier type="issn">0014-3057</identifier>
    <identifier type="issn">1873-1945</identifier>
    <enrichment key="date_peer_review">28.05.2015</enrichment>
    <author>Jing Leng</author>
    <author>Purv Purohit</author>
    <author>N. Kang</author>
    <author>D.-Y. Wang</author>
    <author>Jana Falkenhagen</author>
    <author>Franziska Emmerling</author>
    <author>Andreas Thünemann</author>
    <author>Andreas Schönhals</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer based nanocomposites</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polylactide</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Layered double hydroxides</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Dielectric spectroscopy</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>42597</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>Article 1700232, 1</pageFirst>
    <pageLast>12</pageLast>
    <pageNumber/>
    <edition/>
    <issue>20</issue>
    <volume>218</volume>
    <type>article</type>
    <publisherName>Wiley-VCH Verlag</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Structure–Property Relationships of Nanocomposites  Based on Polylactide and Layered Double   Hydroxides – Comparison of MgAl and NiAl LDH as Nanoﬁller</title>
    <abstract language="eng">Nanocomposites based on poly(L-lactide) (PLA) and organically modiﬁed Ni/Al layered double hydroxides (NiAl/LDHs) are prepared by melt blending and investigated by a combination of size exclusion chromatography, differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS), wide-angle X-ray scattering, and broadband dielectric spectroscopy. A detailed comparison to the behavior of the corresponding MgAl/LDH–PLA nanocomposites is made. SAXS investigations show that the morphology of the NiAl/LDH–PLA nanocomposites is more intercalated compared to the MgAl/LDH based PLA nanocomposite, which is more exfoliated. The DSC investigation gives a different dependence of the degree of crystallization on the concentration of LDH for NiAl/LDH–PLA than for MgAl/LDH–PLA nanocomposite system. These differences are discussed taking the differences of the morphologies of both systems into account. Broadband dielectric spectroscopy reveals information about the molecular dynamics where essential differences are observed for all relaxation processes taking place in both systems which were related to the different morphologies.</abstract>
    <parentTitle language="eng">Macromolecular Chemistry and Physics</parentTitle>
    <identifier type="doi">10.1002/macp.201700232</identifier>
    <identifier type="issn">1022-1352</identifier>
    <identifier type="issn">1521-3935</identifier>
    <enrichment key="date_peer_review">06.11.2017</enrichment>
    <author>Jing Leng</author>
    <author>Nianjun Kang</author>
    <author>De-Yi Wang</author>
    <author>Jana Falkenhagen</author>
    <author>Andreas Thünemann</author>
    <author>Andreas Schönhals</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanocomposites</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polylactide</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>62191</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>247</pageFirst>
    <pageLast>248</pageLast>
    <pageNumber/>
    <edition/>
    <issue>S2</issue>
    <volume>30</volume>
    <type>article</type>
    <publisherName>Wiley</publisherName>
    <publisherPlace>New York, NY</publisherPlace>
    <creatingCorporation>European Peptide Society</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Rational design of polyﬂuorinated peptide-based materials: Self-assembly of an amphiphilic motif</title>
    <abstract language="eng">Generation of a pH sensitive amphiphilic block oligopeptide containing the bioactive function RGD and a library of derivatives varying the length of the hydrophobic core and the degree of side chain fluorination. Peptide rational design enables us to obtain desired features (pH sensitivity etc.). The introduction of fluorine alters a wide range of peptide properties such as secondary structure propensity, folding, thermal and metabolic stability and proteolytic resistance. The RGD function is highly effective at promoting the attachment of numerous cell types to a plethora of materials. This small sequence is the principal integrin-binding domain present within ECM proteins such as fiobronectin, vibronectin and fibrinogen. For this reason, RGD containing peptides offer several advantages for biomaterials applications. The use of RGD compared with native ECM proteins, minimized the risk of immune reactivity or pathogen transfer. Herein in this work, we present the peptide motif X6RGD and its fluoro-derivates for prospective receptor-specific drug delivery in cancer theraphy. Overall, our results demonstrate that high degree of fluorination achieved triggers a selective modification of peptide self-assembly dramatically improving the structural properties, the carrier suitability, enzimatic degradation profiles and cytotoxic features of the fluoropeptide conjugate(s).</abstract>
    <parentTitle language="eng">Journal of peptide science</parentTitle>
    <identifier type="issn">1099-1387</identifier>
    <enrichment key="opus_doi_flag">true</enrichment>
    <enrichment key="opus_import_data">{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,9,25]],"date-time":"2024-09-25T04:31:29Z","timestamp":1727238689442},"reference-count":0,"publisher":"The European Peptide Society","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"DOI":"10.17952\/37eps.2024.p1302","type":"proceedings-article","created":{"date-parts":[[2024,9,24]],"date-time":"2024-09-24T16:45:11Z","timestamp":1727196311000},"page":"1302-1302","source":"Crossref","is-referenced-by-count":0,"title":["Rational design of poly\ufb02uorinated peptide-based materials: Self-assembly of an amphiphilic motif"],"prefix":"10.17952","author":[{"given":"Maurizio","family":"Iannuzzi","sequence":"first","affiliation":[]},{"given":"Suvrat","family":"Chowdhary","sequence":"additional","affiliation":[]},{"given":"Holly","family":"Fiedler","sequence":"additional","affiliation":[]},{"given":"Kilian","family":"Haoues","sequence":"additional","affiliation":[]},{"given":"Boris","family":"Schade","sequence":"additional","affiliation":[]},{"given":"Andreas F.","family":"Th\u00fcnemann","sequence":"additional","affiliation":[]},{"given":"Elisa","family":"Quaas","sequence":"additional","affiliation":[]},{"given":"Beate","family":"Koksch","sequence":"additional","affiliation":[]}],"member":"36720","published-online":{"date-parts":[[2024,9,20]]},"event":{"name":"37th European Peptide Symposium","acronym":"37EPS"},"container-title":["Proceedings of the 37th European Peptide Symposium"],"original-title":[],"deposited":{"date-parts":[[2024,9,24]],"date-time":"2024-09-24T16:45:13Z","timestamp":1727196313000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.kvinzo.com\/37EPS\/Ianuzzi-1726586152-3vm6nE.pdf"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,9,20]]},"references-count":0,"URL":"https:\/\/doi.org\/10.17952\/37eps.2024.p1302","relation":{},"subject":[],"published":{"date-parts":[[2024,9,20]]}}}</enrichment>
    <enrichment key="local_crossrefDocumentType">proceedings-article</enrichment>
    <enrichment key="RelatedIdentifier">https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/62139</enrichment>
    <enrichment key="eventName">37th European Peptide Symposium</enrichment>
    <enrichment key="eventPlace">Florence, Italy</enrichment>
    <enrichment key="eventStart">25.08.2024</enrichment>
    <enrichment key="eventEnd">29.08.2024</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <enrichment key="date_peer_review">13.12.2024</enrichment>
    <author>Maurizio Iannuzzi</author>
    <author>Suvrat Chowdhary</author>
    <author>Holly Fiedler</author>
    <author>Kilian Haoues</author>
    <author>Boris Schade</author>
    <author>Andreas Thünemann</author>
    <author>Elisa Quaas</author>
    <author>Beate Koksch</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanostructure</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>SAXS</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Small-angle X-ray scattering</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.5 Synthese und Streuverfahren nanostrukturierter Materialien</collection>
    <collection role="themenfelder" number="">Material</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="themenfelder" number="">Advanced Materials</collection>
  </doc>
  <doc>
    <id>50810</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>127000</pageFirst>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>327</volume>
    <type>article</type>
    <publisherName>Elsevier Ltd.</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">The presence of iron oxide nanoparticles in the food pigment E172</title>
    <abstract language="eng">Iron oxides used as food colorants are listed in the European Union with the number E172. However, there are no specifications concerning the fraction of nanoparticles in these pigments.&#13;
Here, seven E172 products were thoroughly characterized. Samples of all colors were analyzed with a Broad spectrum of methods to assess their physico-chemical properties. Small-Angle X-ray Scattering (SAXS), Dynamic Light Scattering (DLS), Transmission Electron Microscopy (TEM), zeta-potential, Inductively Coupled Plasma-Mass Spectrometry (ICP-MS), X-ray diffraction (XRD), Brunauer-Emmett-Teller analysis (BET), Asymmetric Flow Field-Flow Fractionation (AF4) and in vitro cell viability measurements were used.&#13;
Nanoparticles were detected in all E172 samples by TEM or SAXS measurements. Quantitative results from both methods were comparable. Five pigments were evaluated by TEM, of which four had a size median below 100 nm, while SAXS showed a size median below 100 nm for six evaluated pigments. Therefore, consumers May be exposed to iron oxide nanoparticles through the consumption of food pigments.</abstract>
    <parentTitle language="eng">Food Chemistry</parentTitle>
    <identifier type="doi">10.1016/j.foodchem.2020.127000</identifier>
    <enrichment key="date_peer_review">03.06.2020</enrichment>
    <author>L. Voss</author>
    <author>I-L. Hsiao</author>
    <author>Maximilian Ebisch</author>
    <author>J. Vidmar</author>
    <author>N. Dreiack</author>
    <author>L. Böhmert</author>
    <author>V. Stock</author>
    <author>A. Braeuning</author>
    <author>K. Loeschner</author>
    <author>P. Laux</author>
    <author>Andreas Thünemann</author>
    <author>A. Lampen</author>
    <author>H. Sieg</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>SAXS</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Small-angle X-ray scattering</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanoparticle</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.5 Synthese und Streuverfahren nanostrukturierter Materialien</collection>
    <collection role="themenfelder" number="">Material</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="themenfelder" number="">Advanced Materials</collection>
  </doc>
  <doc>
    <id>25633</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>457</pageFirst>
    <pageLast>468</pageLast>
    <pageNumber/>
    <edition/>
    <issue>2</issue>
    <volume>126</volume>
    <type>article</type>
    <publisherName>Oxford University Press</publisherName>
    <publisherPlace>Oxford</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Effects of silver nanoparticles on primary mixed neural cell cultures: uptake, oxidative stress and acute calcium responses</title>
    <abstract language="eng">In the body, nanoparticles can be systemically distributed and then may affect secondary target organs, such as the central nervous system (CNS). Putative adverse effects on the CNS are rarely investigated to date. Here, we used a mixed primary cell model consisting mainly of neurons and astrocytes and a minor proportion of oligodendrocytes to analyze the effects of well-characterized 20 and 40 nm silver nanoparticles (SNP). Similar gold nanoparticles served as control and proved inert for all endpoints tested. SNP induced a strong size-dependent cytotoxicity. Additionally, in the low concentration range (up to 10 µg/ml of SNP), the further differentiated cultures were more sensitive to SNP treatment. For detailed studies, we used low/medium dose concentrations (up to 20 µg/ml) and found strong oxidative stress responses. Reactive oxygen species (ROS) were detected along with the formation of protein carbonyls and the induction of heme oxygenase-1. We observed an acute calcium response, which clearly preceded oxidative stress responses. ROS formation was reduced by antioxidants, whereas the calcium response could not be alleviated by antioxidants. Finally, we looked into the responses of neurons and astrocytes separately. Astrocytes were much more vulnerable to SNP treatment compared with neurons. Consistently, SNP were mainly taken up by astrocytes and not by neurons. Immunofluorescence studies of mixed cell cultures indicated stronger effects on astrocyte morphology. Altogether, we can demonstrate strong effects of SNP associated with calcium dysregulation and ROS formation in primary neural cells, which were detectable already at moderate dosages.</abstract>
    <parentTitle language="eng">Toxicological sciences</parentTitle>
    <identifier type="old">28357</identifier>
    <identifier type="doi">10.1093/toxsci/kfs003</identifier>
    <identifier type="issn">1096-6080</identifier>
    <identifier type="issn">1096-0929</identifier>
    <enrichment key="date_peer_review">28.03.2012</enrichment>
    <author>A. Haase</author>
    <author>S. Rott</author>
    <author>Alexandre Mantion</author>
    <author>P. Graf</author>
    <author>J. Plendl</author>
    <author>Andreas Thünemann</author>
    <author>W.P. Meier</author>
    <author>A. Taubert</author>
    <author>A. Luch</author>
    <author>G Reiser</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Silver nanoparticles</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Neurons</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Oxidative stress</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Protein carbonyls</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Calcium</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Reference material</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanoparticle</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Small-angle X-ray scattering</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>SAXS</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>22409</id>
    <completedYear/>
    <publishedYear>2010</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>2115</pageFirst>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue>11</issue>
    <volume>636</volume>
    <type>article</type>
    <publisherName>Wiley-VCH</publisherName>
    <publisherPlace>Weinheim</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Silicification of peptide-coated chiral nanosilver: Novel core-shell structures</title>
    <abstract language="eng">Nanosilver is increasingly used in optics, medicine and analytical chemistry. We recently reported on the synthesis and properties of novel peptide-coated chiral nanosilver [1] using a small hexapeptide based on the amino acids CKK. In a continuation of our previous work, we use the peptides to catalyse TEOS hydrolysis in order to form a dense silica layer shell around a single nanoparticle, preventing chemical etching, allowing their inclusion in other inorganics, and making them biocompatible. Because of mild reaction conditions, the peptide integrity is ensured, as the chiral information which is contained in the nanoparticle. Moreover, these novel core-shell structures remain well-dispersed and are biocompatible. The possibility of further processing (creation of metamaterials etc.) is also in the focus of our interest.</abstract>
    <parentTitle language="eng">Zeitschrift für anorganische und allgemeine Chemie = Journal of inorganic and general chemistry</parentTitle>
    <identifier type="old">24933</identifier>
    <identifier type="doi">10.1002/zaac.201009133</identifier>
    <identifier type="issn">0044-2313</identifier>
    <identifier type="issn">1521-3749</identifier>
    <identifier type="issn">0372-7874</identifier>
    <identifier type="issn">0863-1786</identifier>
    <identifier type="issn">0863-1778</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="date_peer_review">18.11.2010</enrichment>
    <author>P. Graf</author>
    <author>Alexandre Mantion</author>
    <author>A. Haase</author>
    <author>Andreas Thünemann</author>
    <author>A. Masic</author>
    <author>A. Luch</author>
    <author>A. Taubert</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Hybrid materials</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanosilver</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Core shell</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>27625</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>151</pageFirst>
    <pageLast>158</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>1274</volume>
    <type>article</type>
    <publisherName>Elsevier B.V.</publisherName>
    <publisherPlace>Amsterdam</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Determination of Hamaker constants of polymeric nanoparticles in organic solvents by asymmetrical flow field-flow fractionation</title>
    <abstract language="eng">Interaction forces between all objects are either of repulsive or attractive nature. Concerning attractive interactions, the determination of dispersion forces are of special interest since they appear in all colloidal systems and have a crucial influence on the properties and processes in these systems. One possibility to link theory and experiment is the description of the London–Van der Waals forces in terms of the Hamaker constant, which leads to the challenging problem of calculating the van der Waals interaction energies between colloidal particles. Hence, the determination of a Hamaker constant for a given material is needed when interfacial phenomena such as adhesion are discussed in terms of the total potential energy between particles and substrates. In this work, the asymmetrical flow field-flow fractionation (AF-FFF) in combination with a Newton algorithm based iteration process was used for the determination of Hamaker constants of different nanoparticles in toluene.</abstract>
    <parentTitle language="eng">Journal of chromatography A</parentTitle>
    <identifier type="old">30452</identifier>
    <identifier type="doi">10.1016/j.chroma.2012.12.001</identifier>
    <identifier type="issn">0021-9673</identifier>
    <enrichment key="date_peer_review">28.01.2013</enrichment>
    <author>Sergey Noskov</author>
    <author>Christian Scherer</author>
    <author>Michael Maskos</author>
    <author>Andreas Thünemann</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Hamaker constant</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Asymmetrical flow field flow fractionation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Lifshitz</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Van der Waals</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>London</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Thermodynamic</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Interaction</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
</export-example>
