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    <id>63365</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
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    <language>eng</language>
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    <pageLast>11</pageLast>
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    <issue>1</issue>
    <volume>5</volume>
    <type>article</type>
    <publisherName>Springer Science and Business Media LLC</publisherName>
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    <title language="eng">Tracking nanoplastics in drinking water: a new frontier with the combination of dielectrophoresis and Raman spectroscopy</title>
    <abstract language="eng">Detection of micro- (MPs) and nanoplastics (NPs) in food and environmental matrices has been gaining relevance due to their potential toxicological effects on human health. While MPs have been detected in a wide range of complex matrices, suitable methods for the characterization and chemical identification of NPs are still lacking, primarily due to significant methodological challenges associated with their nano-specific physiochemical properties, including size distribution (1 nm – 1 µm), dynamic surface chemical changes, and carbon-based composition, which complicate their detection compared to engineered nanomaterials. To overcome the traditional limitations of spectroscopic techniques in terms of spatial resolution and sensitivity at the sub-micrometer level, a novel label-free methodology is presented for specifically identifying the chemical composition of NPs directly in suspension by combining Raman spectroscopy with dielectrophoresis (DEP). Using a custom-built device, small volumes of NPs are injected into a dielectrophoretic cell and locally trapped by DEP forces to fill the Raman confocal volume, facilitating their detection and identification, and providing high signal-to-noise ratio Raman spectra for more reliable analysis. This approach was successfully applied to both Milli-Q water and a commercial brand of drinking water, enabling the rapid identification of various types of NPs with different sizes and polymer compositions at concentrations as low as 20 µg/mL. These included certified reference polystyrene beads ranging from 800 to 60 nm in diameter, as well as polydisperse NPs, more representative of real samples in terms of size distribution and polymer type, such as polyethylene (450 nm), polypropylene (180 nm), and polyethylene terephthalate (100 nm). Moreover, the chemical fingerprint of each NPs was thoroughly investigated and compared with the corresponding bulk polymers, highlighting possible changes in the Raman bands due to surface oxidation or nanometer-scale effect. Therefore, this innovative method can be considered a valuable approach for addressing gaps in the detection and identification of NPs, as well as for monitoring their dynamic phisiochemical changes in real matrices.</abstract>
    <parentTitle language="eng">Microplastics and Nanoplastics</parentTitle>
    <identifier type="issn">2662-4966</identifier>
    <identifier type="doi">10.1186/s43591-025-00131-y</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-633658</identifier>
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    <enrichment key="date_peer_review">16.07.2025</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Marta Fadda</author>
    <author>Alessio Sacco</author>
    <author>Korinna Altmann</author>
    <author>Dmitri Ciornii</author>
    <author>Frank Milczewski</author>
    <author>Miguel A. Bañares</author>
    <author>Raquel Portela</author>
    <author>Andrea Mario Giovannozzi</author>
    <author>Andrea Mario Rossi</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanoplastics</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Water contaminants</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Raman microspectroscopy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Dielectrophoresis</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
    <collection role="ddc" number="628">Sanitär- und Kommunaltechnik; Umwelttechnik</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.1 Oberflächen- und Dünnschichtanalyse</collection>
    <collection role="institutes" number="">6.5 Synthese und Streuverfahren nanostrukturierter Materialien</collection>
    <collection role="themenfelder" number="">Umwelt</collection>
    <collection role="themenfelder" number="">Umwelt-Material-Interaktionen</collection>
    <collection role="themenfelder" number="">Chemie und Prozesstechnik</collection>
    <collection role="themenfelder" number="">Chemische Charakterisierung und Spurenanalytik</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>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/63365/s43591-025-00131-y.pdf</file>
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  <doc>
    <id>63958</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>20</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>497</volume>
    <type>article</type>
    <publisherName>Elsevier B.V.</publisherName>
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    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
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    <title language="eng">Quality-by-design and current good practices for the production of test and reference materials for micro- and nano-plastic research</title>
    <abstract language="eng">Understanding the environmental and human health impacts of micro- and nanoplastic pollutants is currently a high priority, stimulating intensive methodological research work in the areas of sampling, sample preparation and detection as well as intensive monitoring and testing. It is challenging to identify and quantify microplastics in complex organic matrices and concepts for nanoplastic detection are still in their infancy. All analytical techniques employed in studying micro- and nanoplastics require suitable reference materials for validation measurements, with requirements as diverse as the analytical tools used, ranging from different polymer types, size distributions and shapes of the material to the concentrations employed in different experimental set ups (ng to g amounts). The aim of this manuscript is to outline current good practices for small-scale laboratory production and characterization of suitable test and reference materials. The focus is placed on top-downfragmentation methods as well as bottom-up precipitation methods. Examples using polyethylene, polypropylene, polystyrene and polyethylene terephthalate with size distribution classes of mainly 10–1000, 1–10 and &lt;1 μm particles will be provided. Experiences and suggestions on how to produce well-characterized micro- and nano-plastics for internal research needs will ensure that studies using the materials have robust and informative outcomes.</abstract>
    <parentTitle language="eng">Journal of Hazardous Materials</parentTitle>
    <identifier type="issn">0304-3894</identifier>
    <identifier type="doi">10.1016/j.jhazmat.2025.139595</identifier>
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    <author>Korinna Altmann</author>
    <author>Lukas Wimmer</author>
    <author>Victor Alcolea-Rodriguez</author>
    <author>Tassilo Waniek</author>
    <author>Volker Wachtendorf</author>
    <author>Kay Matzdorf</author>
    <author>Dmitri Ciornii</author>
    <author>Petra Fengler</author>
    <author>Frank Milczewski</author>
    <author>Itziar Otazo-Aseguinolaza</author>
    <author>Manuel Ferrer</author>
    <author>Miguel A. Bañares</author>
    <author>Raquel Portela</author>
    <author>Lea Ann Dailey</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Mmicroplastics</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanoplastics</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Reference materials</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Standard validation method</value>
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    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="ddc" number="628">Sanitär- und Kommunaltechnik; Umwelttechnik</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.1 Oberflächen- und Dünnschichtanalyse</collection>
    <collection role="institutes" number="">6.5 Synthese und Streuverfahren nanostrukturierter Materialien</collection>
    <collection role="institutes" number="">7 Bauwerkssicherheit</collection>
    <collection role="institutes" number="">7.5 Technische Eigenschaften von Polymerwerkstoffen</collection>
    <collection role="themenfelder" number="">Umwelt</collection>
    <collection role="themenfelder" number="">Umwelt-Material-Interaktionen</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>
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