51655
2020
eng
063208
6
38
article
American Vacuum Society
1
--
--
--
Versailles Project on Advanced Materials and Standards interlaboratory study on intensity calibration for x-ray photoelectron spectroscopy instruments using low-density polyethylene
We report the results of a Versailles Project on Advanced Materials and Standards interlaboratory study on the intensity scale calibration of x-ray photoelectron spectrometers using low-density polyethylene (LDPE) as an alternative material to gold, silver, and copper. An improved set of LDPE reference spectra, corrected for different instrument geometries using a quartz-monochromated Al Kα x-ray source, was developed using data provided by participants in this study. Using
these new reference spectra, a transmission function was calculated for each dataset that participants provided. When compared to a similar calibration procedure using the NPL reference spectra for gold, the LDPE intensity calibration method achieves an absolute offset of ∼3.0% and a systematic deviation of ±6.5% on average across all participants. For spectra recorded at high pass energies (≥90 eV), values of absolute offset and systematic deviation are ∼5.8% and ±5.7%, respectively, whereas for spectra collected at lower pass energies (<90 eV), values of absolute offset and systematic deviation are ∼4.9% and ±8.8%, respectively; low pass energy spectra perform worse than the global average, in terms of systematic deviations, due to diminished count rates and signal-to-noise ratio. Differences in absolute offset are attributed to the surface roughness of the LDPE induced by sample preparation. We further assess the usability of LDPE as a secondary reference material and comment on its performance in the presence of issues such as variable dark noise, x-ray warm up times, inaccuracy at low count rates, and underlying spectrometer problems. In response to participant feedback and the results of the study, we provide an updated LDPE intensity calibration protocol to address the issues highlighted in the interlaboratory study. We also comment on the lack of implementation of a consistent and traceable intensity calibration method across the community of x-ray photoelectron spectroscopy (XPS) users and, therefore, propose a route to achieving this with the assistance of instrument manufacturers, metrology laboratories, and experts leading to an international standard for XPS intensity scale calibration.
Journal of Vacuum Science & Technology A
10.1116/6.0000577
14.12.2020
B. P. Reed
D.J.H. Cant
J. Spencer
A. J. Carmona-Carmona
A. Bushell
A. Herrara-Gómez
A. Kurokawa
A. Thissen
A.G. Thomas
A.J. Britton
A. Bernasik
A. Fuchs
A. P. Baddorf
B. Bock
B. Thellacker
B. Cheng
D.G. Castner
D.J. Morgan
D. Valley
E.A. Willneff
E.F. Smith
E. Nolot
F. Xie
G. Zorn
G.C. Smith
H. Yasukufu
J. L. Fenton
J. Chen
J..D.P. Counsell
Jörg Radnik
K.J. Gaskell
K. Artyushkova
L. Yang
L. Zhang
M. Eguchi
M. Walker
M. Hajdyla
M.M. Marzec
M.R. Linford
N. Kubota
O. Cartazar-Martínez
P. Dietrich
R. Satoh
S.L.M. Schroeder
T.G. Avval
T. Nagatomi
V. Fernandez
W. Lake
Y. Azuma
Y. Yoshikawa
A.G. Shard
eng
uncontrolled
X-ray photoelectron spectroscopy
eng
uncontrolled
Transmission function
eng
uncontrolled
Intensity scale calibration
eng
uncontrolled
Reference spectra
eng
uncontrolled
Low-density polyethylene (LDPE)
Analytische Chemie
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
Chemie und Prozesstechnik
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
52380
2021
eng
027001
2
39
article
American Vacuum Society
1
--
--
--
ERRATUM: “Versailles project on advanced materials and standards interlaboratory study on intensity calibration for x-ray photoelectron spectroscopy instruments using low-density polyethylene” [J. Vac. Sci. Technol. A 38, 063208 (2020)]
The lead authors failed to name two collaborators as co-authors. The authors listed should include:
Miss Claudia L. Compean-Gonzalez (ORCID:
0000-0002-2367-8450) and Dr. Giacomo Ceccone (ORCID:
0000-0003-4637-0771).
These co-authors participated in VAMAS project A27, provided data that were analyzed and presented in this publication (and supporting information), and reviewed the manuscript before submission.
Journal of Vacuum Science & Technology A
10.1116/6.0000907
publish
07.04.2021
false
true
B. P. Reed
D.J.H. Cant
S.J. Spencer
A. J. Carmona-Carmona
A. Bushell
A. Herrara-Gómez
A. Kurokawa
A. Thissen
A.G. Thomas
A.J. Britton
A. Bernasik
A. Fuchs
A.P. Baddorf
B. Bock
B. Thellacker
B. Cheng
D.G. Castner
D.J. Morgan
D. Valley
E.A. Willneff
E.P. Smith
E. Nolot
F. Xie
G. Zorn
G.C. Smith
H. Yasukufu
J.L. Fenton
J. Chen
J.D.P. Counsell
Jörg Radnik
K.J. Gaskell
K. Artyushkova
L. Yang
L. Zhang
M. Eguchi
M. Walker
M. Hajdyla
M.M. Marzec
M.R. Linford
N. Kubota
O. Cortazar-Martinez
P. Dietrich
R. Satoh
S.L.M. Schroeder
T.G. Avval
T. Nagatomi
V. Fernandez
W. Lake
Y. Azuma
Y. Yoshikawa
C.L. Compean-Gonzalez
G. Ceccone
A.G. Shard
eng
uncontrolled
X-ray photoelectron spectroscopy
eng
uncontrolled
Transmission function
eng
uncontrolled
Low-density polyethylene
Analytische Chemie
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
Chemie und Prozesstechnik
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
38428
2016
eng
24070
24079
120
article
ACS Publications
1
--
--
--
Versailles Project on Advanced Materials and Standards Interlaboratory Study on Measuring the Thickness and Chemistry of Nanoparticle Coatings Using XPS and LEIS
We report the results of a Versailles Project on Advanced Materials and Standards (VAMAS) interlaboratory study on the measurement of the shell thickness and chemistry of nanoparticle coatings. Peptide-coated gold particles were supplied to laboratories in two forms: a colloidal suspension in pure water and particles dried onto a silicon wafer. Participants prepared and analyzed these samples using either X-ray photoelectron spectroscopy (XPS) or low energy ion scattering (LEIS). Careful data analysis revealed some significant sources of discrepancy, particularly for XPS. Degradation during transportation, storage, or sample preparation resulted in a variability in thickness of 53%. The calculation method chosen by XPS participants contributed a variability of 67%. However, variability of 12% was achieved for the samples deposited using a single method and by choosing photoelectron peaks that were not adversely affected by instrumental transmission effects. The study identified a need for more consistency in instrumental transmission functions and relative sensitivity factors since this contributed a variability of 33%. The results from the LEIS participants were more consistent, with variability of less than 10% in thickness, and this is mostly due to a common method of data analysis. The calculation was performed using a model developed for uniform, flat films, and some participants employed a correction factor to account for the sample geometry, which appears warranted based upon a simulation of LEIS data from one of the participants and comparison to the XPS results.
The Journal of Physical Chemistry C
10.1021/acs.jpcc.6b06713
http://pubs.acs.org/doi/pdf/10.1021/acs.jpcc.6b06713
24.11.2016
N. A. Belsey
D. J. H. Cant
C. Minelli
J. R. Araujo
B. Bock
P. Brüner
D. G. Castner
G. Ceccone
J. D. P. Counsell
Paul M. Dietrich
M. H. Engelhardt
S. Fearn
C. E. Galhardo
H. Kalbe
J. W. Kim
L. Lartundo-Rojas
H. S. Luftman
T. S. Nunney
J. Pseiner
E. F. Smith
V. Spampinato
J. M. Sturm
A. G. Thomas
J. P. W. Treacy
L. Veith
M. Wagstaffe
H. Wang
M. Wang
Y.-C. Wang
W. Werner
L. Yang
A. G. Shard
eng
uncontrolled
VAMAS
eng
uncontrolled
Interlaboratory Study
eng
uncontrolled
Nanoparticle coating
eng
uncontrolled
XPS
eng
uncontrolled
LEIS
eng
uncontrolled
shell thicknss and chemistry
Analytische Chemie
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
2184
1994
eng
11
16
24
article
International Scientific Communications
Greens Farms, Conn.
0
--
--
--
New aspects concerning the stability of silica-based HPLC separation phases
International laboratory
2118
0010-2164
Sonderstandort: Publica-Schrank
Jana Falkenhagen
P. Dietrich
Verlagsliteratur
Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
24874
2011
eng
361
372
4-6
30
article
Taylor & Francis
London [u.a.]
1
--
--
--
Multimethod chemical characterization of carbohydrate-functionalized surfaces
A combined XPS, NEXAFS, and ToF-SIMS chemical surface characterization of carbohydrate-functionalized gold and glass surfaces is presented. Spot shape and chemical composition across a spot surface are provided by surface-sensitive methods as ToF-SIMS and XPS, used in their imaging modes. Moreover, the feasibility of this multimethod approach to control relevant production steps of a carbohydrate microarray prototype is demonstrated.
Journal of carbohydrate chemistry
27563
10.1080/07328303.2011.615181
0732-8303
28.11.2011
Paul Dietrich
T. Horlacher
Pierre-Luc Girard-Lauriault
Thomas Gross
Andreas Lippitz
Hyegeun Min
Thomas Wirth
R. Castelli
P. Seeberger
Wolfgang Unger
eng
uncontrolled
Carbohydrates
eng
uncontrolled
Microarrays
eng
uncontrolled
Self-assembled monolayers
eng
uncontrolled
XPS
eng
uncontrolled
NEXAFS
eng
uncontrolled
ToF-SIMS
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
54973
2022
eng
1
8
3
17
article
AVS
1
--
--
--
In-depth analysis of iodine in artificial biofilm model layers by variable excitation energy XPS and argon gas cluster ion sputtering XPS
Here, we present a study on agarose thin-film samples that represent a model system for the exopolysaccharide matrix of biofilms. Povidone-iodide (PVP-I) was selected as an antibacterial agent to evaluate our x-ray photoelectron spectroscopy (XPS)-based methodology to trace specific marker elements, here iodine, commonly found in organic matrices of antibiotics. The in-depth distribution of iodine was determined by XPS analyses with variable excitation energies and in combination with argon gas cluster ion beam sputter cycles. On mixed agarose/PVP-I nanometer-thin films, both methods were found to solve the analytical task and deliver independently comparable results. In the mixed agarose/PVP-I thin film, we found the outermost surface layer depleted in iodine, whereas the iodine is homogeneously distributed in the depth region between this outermost surface layer and the interface between the thin film and the substrate. Depletion of iodine from the uppermost surface in the thin-film samples is assumed to be caused by ultrahigh vacuum exposure resulting in a loss of molecular iodine (I2) as reported earlier for other iodine-doped polymers.
Biointerphases
10.1116/6.0001812
1934-8630
publish
09.06.2022
false
true
P. M. Dietrich
Marit Kjærvik
E. A. Willneff
Wolfgang Unger
eng
uncontrolled
Biofilm
eng
uncontrolled
XPS
eng
uncontrolled
Argon gas cluster ion sputtering
eng
uncontrolled
Variable excitation
eng
uncontrolled
Iodine
Analytische Chemie
Ingenieurwissenschaften und zugeordnete Tätigkeiten
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
Material
Chemie und Prozesstechnik
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Nano
52098
2021
eng
147042
247
article
Elsevier B.V.
Amsterdam, Netherlands
1
--
--
--
Application of near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) in an in-situ analysis of the stability of the surface-supported metal-organic framework HKUST-1 in water, methanol and pyridine atmospheres
Surface-supported metal-organic frameworks HKUST-1 (Hong Kong University of Science and Technology) were used as a model system for a development of a near ambient pressure (NAP) XPS based approach to investigate interaction with atmospheres of water, methanol or pyridine at pressures ranging from 1 to 4 mbar. The films were grown on a gold substrate functionalized with a COOH-terminated self-assembled monolayer using liquidphase epitaxy in a step-by-step fashion. Measurement protocols were developed and optimised for different gases in order to obtain spectra of similar quality in terms of signal intensity, noise and shape. Peak shapes were found to depend on the efficiency of charge compensation. Reference measurements in argon proved to be a useful strategy not only for the evaluation of the Cu(II)-fraction in pristine samples, but also to identify the contributions by the respective gas atmosphere to the C 1s and O 1s photoelectron spectra. Reduced copper was found during the exposition of HKUST-1 to water vapour and pyridine, but this effect was not observed in case of methanol. Additionally, it was established that there are no changes in relative Cu(II) percentage with increasing exposure time. This indicates that saturation was reached already at the lowest time of gas exposure. A detailed elucidation of the mechanism of Cu(II) reduction to Cu(I) in HKUST-1 mediated by water and pyridine is part of ongoing work and not in the scope of the present paper.
Journal of Electron Spectroscopy and Related Phenomena
0368-2048
10.1016/j.elspec.2020.147042
publish
10.05.2021
Marit Kjaervik
P. M. Dietrich
A. Thissen
Jörg Radnik
A. Nefedov
C. Natzeck
C. Wöll
Wolfgang Unger
eng
uncontrolled
HKUST-1
eng
uncontrolled
Near-ambient pressure X-ray photoelectron spectroscopy
eng
uncontrolled
Metal-organic frameworks
eng
uncontrolled
Interaction with atmospheres
eng
uncontrolled
Water
Analytische Chemie
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
Chemie und Prozesstechnik
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
52564
2021
eng
Article 666161
9
article
Frontiers
Switzerland
1
--
--
--
Comparative Study of NAP-XPS and Cryo-XPS for the Investigation of Surface Chemistry of the Bacterial Cell-Envelope
Bacteria generally interact with the environment via processes involving their cell-envelope. Thus, techniques that may shed light on their surface chemistry are attractive tools for providing an understanding of bacterial interactions. One of these tools is Al Kα-excited photoelectron spectroscopy (XPS) with its estimated information depth of <10 nm. XPS-analyses of bacteria have been performed for several decades on freeze-dried specimens in order to be compatible with the vacuum in the analysis chamber of the spectrometer. A limitation of these studies has been that the freeze-drying method may collapse cell structure as well as introduce surface contaminants. However, recent developments in XPS allow for analysis of biological samples at near ambient pressure (NAP-XPS) or as frozen hydrated specimens (cryo-XPS) in vacuum. In this work, we have analyzed bacterial samples from a reference strain of the Gram-negative bacterium Pseudomonas fluorescens using both techniques. We compare the results obtained and, in general, observe good agreement between the two techniques. Furthermore, we discuss advantages and disadvantages with the two analysis approaches and the output data they provide. XPS reference data from the bacterial strain are provided, and we propose that planktonic cells of this strain (DSM 50090) are used as a reference material for surface chemical analysis of bacterial systems.
Frontiers in Chemistry
10.3389/fchem.2021.666161
urn:nbn:de:kobv:b43-525640
publish
31.05.2021
Creative Commons - CC BY - Namensnennung 4.0 International
Marit Kjaervik
M. Ramstedt
Karin Schwibbert
P. M Dietrich
Wolfgang Unger
eng
uncontrolled
P. Fluorescens
eng
uncontrolled
Cryo XPS
eng
uncontrolled
NAP-XPS
eng
uncontrolled
DSM 5009
Analytische Chemie
4 Material und Umwelt
4.1 Biologische Materialschädigung und Referenzorganismen
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
Chemie und Prozesstechnik
Verlagsliteratur
Wissenschaftliche Artikel der BAM
Bundesanstalt für Materialforschung und -prüfung (BAM)
https://opus4.kobv.de/opus4-bam/files/52564/fchem-09-666161.pdf
55990
2022
eng
1
10
601
article
Elsevier B.V.
1
--
--
--
The comparison of the corrosion behavior of the CrCoNi medium entropy alloy and CrMnFeCoNi high entropy alloy
This work presents the determination of the corrosion characteristics of CrCoNi (medium entropy alloy) and CrMnFeCoNi (high entropy alloy) in 0.1 M NaCl and 0.1 M H2SO4. The morphology and chemical composition of the oxide layers formed on CrCoNi and CrMnFeCoNi were comparatively analyzed by scanning Kelvin probe microscopy (SKPFM) and scanning electron microscopy (SEM) and supported with chemical analysis by means of inductively coupled plasma mass spectrometry (ICP-MS) and X-Ray photoelectron spectroscopy (XPS). The analysis of the 3p core level peaks showed that the oxide layer (native and after anodic passivation) on CrCoNi consisted mainly of Cr oxides, while the oxide layer on CrMnFeCoNi was primarily composed of a mixture of Cr and Fe oxides. In addition, XPS was utilized to assess the oxide layer thicknesses. These results were compared to the thicknesses obtained by means of electrochemical impedance spectroscopy (EIS), with both approaches yielding values up to about 4 nm depending on the electrolyte and the alloy. Cyclic polarization measurements indicated superior corrosion resistance of CrCoNi in both aqueous environments compared to CrMnFeCoNi, as well as to AISI 304 stainless steel.
Applied Surface Science
10.1016/j.apsusc.2022.154171
0169-4332
urn:nbn:de:kobv:b43-559902
publish
19.10.2022
false
true
Creative Commons - CC BY - Namensnennung 4.0 International
Annica Wetzel
Marcus von der Au
P. M. Dietrich
Jörg Radnik
Özlem Özcan Sandikcioglu
Julia Witt
eng
uncontrolled
Medium entropy alloy
eng
uncontrolled
High entropy alloy
eng
uncontrolled
SKPFM
eng
uncontrolled
XPS
eng
uncontrolled
Passivation
eng
uncontrolled
Corrosion
Ingenieurwissenschaften und zugeordnete Tätigkeiten
1 Analytische Chemie; Referenzmaterialien
1.1 Anorganische Spurenanalytik
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
6.2 Material- und Oberflächentechnologien
Material
Degradation von Werkstoffen
Verlagsliteratur
Datei für die Öffentlichkeit verfügbar ("Open Access")
Wissenschaftliche Artikel der BAM
Bundesanstalt für Materialforschung und -prüfung (BAM)
https://opus4.kobv.de/opus4-bam/files/55990/AppSurfSci_2022_Wetzel.pdf
44588
2018
eng
1
5
Application Note #000399
other
Berlin
SPECS Surface Nano Analysis GmbH
0
--
--
--
XPS surface analysis of bacterial samples
This application note presents how EnviroESCA can be used to analyze bacterial samples under near ambient pressure conditions in various states of hydration using different levels of humidity. Such investigations of bacterial cell wall surfaces in their hydrated state are essential for studying biological interfaces at work.
The use of innovative near-ambient pressure (NAP-)XPS instrumentation allows the detailed analysis of irregularly-surfaced biofilms. NAP-XPS enables the surface analysis of bacterial samples in their natural hydrated state without complex sample preparation techniques such as freeze-drying or fast-freezing, which are needed for XPS analysis in ultrahigh vacuum.
http://www.enviroai.com/uploads/1/0/2/8/102861712/xps_surface_analysis_of_bacillus_subtilis_biofilms_final.pdf
P. Dietrich
K. Beblo-Vranesevic
Marit Kjærvik
Wolfgang Unger
Karin Schwibbert
K. Hardie
J. Brown
eng
uncontrolled
Near ambient pressure XPS
eng
uncontrolled
Biofilms
Analytische Chemie
4 Material und Umwelt
4.1 Biologische Materialschädigung und Referenzorganismen
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
Chemie und Prozesstechnik
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
45404
2018
eng
996
1000
11
50
article
John Wiley & Sons
Hoboken, New Jersey, USA
1
--
--
--
Surface characterisation of Escherichia coli under various conditions by near-ambient pressure XPS
Bacteria are inherently in a hydrated state and therefore not compatible to ultra-high vacuum techniques such as XPS without prior sample preparation involving freeze drying or fast freezing.
This has changed with the development of near-ambient pressure (NAP)-XPS, which makes it possible to characterise the bacterial surface with minimal sample preparation. This paper presents NAP-XPS measurements of Escherichia coli under various NAP conditions: at 11 mbar in a humid environment, at 2 mbar after drying in the chamber, pre-dried at 4 mbar, and at 1 mbar after overnight pumping at 10^−4 mbar. The high-resolution spectra of carbon, nitrogen, and oxygen are presented and found to be in general agreement with XPS measurements from freeze-dried and fast-frozen bacteria. However, it was found that the amount of carbon components associated with polysaccharides increases relative to aliphatic carbon during drying and increases further after overnight pumping. This implies that drying has an impact on the bacterial surface.
Surface and Interface Analysis
10.1002/sia.6480
0142-2421
urn:nbn:de:kobv:b43-454047
1096-9918
European conference on applications of surface and interface analysis (ECASIA'17)
Montpellier, France
24.09.2018
29.09.2018
15.11.2018
Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International
Marit Kjaervik
Karin Schwibbert
P. Dietrich
A. Thissen
Wolfgang Unger
eng
uncontrolled
Bacteria
eng
uncontrolled
E. coli
eng
uncontrolled
NAP-XPS
Analytische Chemie
4 Material und Umwelt
4.1 Biologische Materialschädigung und Referenzorganismen
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
Chemie und Prozesstechnik
Verlagsliteratur
Datei für die Öffentlichkeit verfügbar ("Open Access")
Wissenschaftliche Artikel der BAM
Bundesanstalt für Materialforschung und -prüfung (BAM)
https://opus4.kobv.de/opus4-bam/files/45404/Kj-rvik_et_al-2018-Surface_and_Interface_Analysis.pdf
45720
2018
eng
1
4
Application Note #000400
other
Berlin, Germany
SPECS Surface Nano Analysis GmbH
0
--
--
--
Near-ambient pressure XPS of hydrated Escherichia coli samples with EnviroESCA
This application note presents how EnviroESCA can be used to analyze E. coli biofilms on silicon under near ambient pressure conditions in various states of hydration. Such investigations of the outer bacterial cell surface in their hydrated state are essential for studying biological interfaces at work.
http://www.enviroai.com/uploads/1/0/2/8/102861712/nap_xps_of_escherichia_coli_samples.pdf
Marit Kjaervik
Karin Schwibbert
P. Dietrich
A. Thissen
Wolfgang Unger
eng
uncontrolled
Biofilms
eng
uncontrolled
E. coli
eng
uncontrolled
NAP-XPS
Analytische Chemie
4 Material und Umwelt
4.1 Biologische Materialschädigung und Referenzorganismen
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
Chemie und Prozesstechnik
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
51201
2020
eng
38714
38722
12
article
ACS Publication
1
--
--
--
Role of Water in Phase Transformations and Crystallization of Ferrihydrite and Hematite
The oxides, hydroxides, and oxo-hydroxides of iron belong to the most abundant materials on earth. They also feature a wide range of practical applications. In many environments, they can undergo facile phase transformations and crystallization processes.
Water appears to play a critical role in many of these processes. Despite numerous attempts, the role of water has not been fully revealed yet. We present a new approach to study the influence of water in the crystallization and phase transformations of iron oxides.
The approach employs model-type iron oxide films that comprise a defined homogeneous nanostructure. The films are exposed to air containing different amounts of water reaching up to pressures of 10 bar. Ex situ analysis via scanning electron microscopy, Transmission electron microscopy, selected area electron diffraction, and X-ray diffraction is combined with operando near-ambient pressure X-ray photoelectron spectroscopy to follow water-induced changes in hematite nd ferrihydrite. Water proves to be critical for the nucleation of ematite domains in ferrihydrite, the resulting crystallite orientation, and the underlying crystallization mechanism.
ACS Applied Materials and Interface
10.1021/acsami.0c05253
14.09.2020
false
true
A. Arinchtein
R. Schnack
K. Kraffert
Jörg Radnik
P. Dietrich
René Sachse
R. Krähnert
eng
uncontrolled
Iron oxide
eng
uncontrolled
Ferrihydrite
eng
uncontrolled
Hematite
eng
uncontrolled
Water
eng
uncontrolled
NAP-XPS
eng
uncontrolled
High pressure
Analytische Chemie
Ingenieurwissenschaften und zugeordnete Tätigkeiten
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
6.7 Materialsynthese und Design
Material
Chemie und Prozesstechnik
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Nano
35595
2015
eng
45
56
4
35
article
Wiley Online Library
National Ground Water Association
0
--
--
--
Comparison of phytoscreening and direct-push-based site investigation at a rural megasite contaminated with chlorinated ethenes
The reliable characterization of subsurface contamination of spatially extended contaminated sites is a challenging task, especially with an unknown history of land use. Conventional technologies often fail due to temporal and financial constraints and thus hinder the redevelopment of abandoned areas in particular. Here we compare two site screening techniques that can be applied quickly at relatively low cost, namely Direct Push (DP)-based groundwater sampling and tree core sampling. The effectiveness of both methods is compared for a rural megasite contaminated with chlorinated hydrocarbons. Unexpected pollution hot spots could be identified using both of these methods, while tree coring even enabled the delineation of the contaminant plume flowing into an adjacent wetland inaccessible for DP units. Both methods showed a good agreement in revealing the spatial pattern of the contamination. The correlation between groundwater concentrations and equivalent concentrations in wood was linear and highly significant for trichloroethene. Correlation was less obvious for its metabolite cis-dichloroethene, but still significant. As outcome of our study we recommend tree coring and for initial screening in combination with a DP sampling to retrieve quantitative data on groundwater pollutants in order to assess the contamination situation of a non- or only partly investigated site. The subsequent placement of monitoring wells for long-term monitoring of contamination levels is recommended. A combination of methods would achieve more relevant information at comparable or possibly even lower efforts in comparison to a conventional site investigation.
Groundwater Monitoring & Remediation
10.1111/gwmr.12122
http://onlinelibrary.wiley.com/doi/10.1111/gwmr.12122/abstract
1745-6592
Olaf Holm
A. Rein
S. Trapp
S. Popp-Hoffmann
M. Bittens
C. Leven
P. Dietrich
eng
uncontrolled
non-invasive investigation
eng
uncontrolled
phytoscreening
eng
uncontrolled
direct-push
eng
uncontrolled
screening
eng
uncontrolled
trichloroethene
eng
uncontrolled
trichloroethylene
eng
uncontrolled
groundwater contamination
eng
uncontrolled
tree core sampling
Sanitär- und Kommunaltechnik; Umwelttechnik
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
48655
2019
eng
014027
1
26
article
American Vacuum Society
New York, USA
0
--
--
--
Bovine serum albumin, aqueous solution, by near-ambient pressure XPS
Near-ambient pressure x-ray photoelectron spectroscopy (NAP-XPS) is a less traditional form of XPS that allows samples to be analyzed at relatively high pressures, i.e., at greater than 2500 Pa. With NAP-XPS, XPS can probe moderately volatile liquids, biological samples, porous materials, and/or polymeric materials that outgas significantly. In this submission, we show survey, C 1s, O 1s, and N
1s narrow scans from an aqueous solution of a common protein, bovine serum albumin. The C 1s peak envelope is well fit to four symmetric peaks of equal width that correspond to carbon bonded to carbon and hydrogen (C-1), carbon singly bonded to oxygen (C-2), carbonyl and/or amide carbon (C-3), and carboxyl carbon (C-4). Two possible peak fits are considered for the N 1s and O 1s peak envelopes. The N 1s signal is fit to four peaks that correspond to amine (—NH2), Amide (OvCZNH2), ammonium (—NH3 +), and N2(g) nitrogen, and alternatively to three peaks that correspond to amine, amide, and N2(g) nitrogen. The O 1s peak envelope is similarly fit to three and four components.
Surface Science Spectra
10.1116/1.5055229
false
true
V. Jain
Marit Kjaervik
S. Bahr
P. Dietrich
M. Meyer
A. Thissen
M. R. Linford
eng
uncontrolled
NAP-XPS
eng
uncontrolled
BSA
eng
uncontrolled
Bovine serum albumin
eng
uncontrolled
XPS
eng
uncontrolled
Near-ambient pressure
Analytische Chemie
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
Chemie und Prozesstechnik
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
52406
2021
eng
50
1
4
article
Springer Nature
London
1
--
--
--
In situ monitoring of the influence of water on DNA radiation damage by near-ambient pressure X-ray photoelectron spectroscopy
Ionizing radiation damage to DNA plays a fundamental role in cancer therapy. X-ray photoelectron-spectroscopy (XPS) allows simultaneous irradiation and damage monitoring. Although water radiolysis is essential for radiation damage, all previous XPS studies were performed in vacuum. Here we present near-ambient-pressure XPS xperiments to directly measure DNA damage under water atmosphere. They permit in-situ monitoring of the effects of radicals on fully hydrated double-stranded DNA. The results allow us to distinguish direct damage, by photons and secondary low-energy electrons (LEE), from damage by hydroxyl radicals or hydration induced modifications of damage pathways. The exposure of dry DNA to x-rays leads to strand-breaks at the sugar-phosphate backbone, while deoxyribose and nucleobases are less affected. In contrast, a strong increase of DNA damage is observed in water, where OH-radicals are produced. In consequence, base damage and base release become predominant, even though the number of strand-breaks increases further.
Communications Chemistry
2399-3669
10.1038/s42004-021-00487-1
urn:nbn:de:kobv:b43-524060
publish
https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/52461
29.04.2021
Creative Commons - CC BY - Namensnennung 4.0 International
Marc Benjamin Hahn
P. M. Dietrich
Jörg Radnik
eng
uncontrolled
DNA
eng
uncontrolled
XPS
eng
uncontrolled
NAP-XPS
eng
uncontrolled
Radiation damage
eng
uncontrolled
Single-strand break (SSB)
eng
uncontrolled
Double-strand break (DSB)
eng
uncontrolled
Xray
eng
uncontrolled
OH radical
eng
uncontrolled
Hydroxyl radical
eng
uncontrolled
LEE
eng
uncontrolled
Low energy electrons
eng
uncontrolled
Dosimetry
eng
uncontrolled
Geant4
eng
uncontrolled
Geant4-DNA
eng
uncontrolled
TOPAS
eng
uncontrolled
TOPAS-nbio
eng
uncontrolled
Microdosimetry
eng
uncontrolled
DNA radiation damage
eng
uncontrolled
Direct damage
eng
uncontrolled
Indirect damage
eng
uncontrolled
Quasi-direct damage
eng
uncontrolled
Hydration shell
eng
uncontrolled
Dry DNA
eng
uncontrolled
Hydrated DNA
eng
uncontrolled
ROS
eng
uncontrolled
Radical
eng
uncontrolled
Reactive oxygen species
eng
uncontrolled
Net-ionization reaction
eng
uncontrolled
Radiation therapy
eng
uncontrolled
Cancer therapy
eng
uncontrolled
Xray photo electron spectrocopy
eng
uncontrolled
Near ambient pressure xray photo electron spectroscopy
eng
uncontrolled
Base damage
eng
uncontrolled
Base loss
eng
uncontrolled
Dissociative electron transfer (DET)
eng
uncontrolled
Dissociative electron attachment (DEA)
eng
uncontrolled
Hydrated electron
eng
uncontrolled
Prehydrated electron
eng
uncontrolled
Ionization
eng
uncontrolled
PES
Analytische Chemie
Ingenieurwissenschaften und zugeordnete Tätigkeiten
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
6.6 Physik und chemische Analytik der Polymere
Material
Chemie und Prozesstechnik
Verlagsliteratur
Datei für die Öffentlichkeit verfügbar ("Open Access")
Bundesanstalt für Materialforschung und -prüfung (BAM)
https://opus4.kobv.de/opus4-bam/files/52406/Water-dependent-DNA-radiation-damage-monitored-by-NAP-XPS.pdf
https://opus4.kobv.de/opus4-bam/files/52406/42004_2021_487_MOESM1_ESM.pdf
39460
2017
eng
1
#000394
other
SPECS
Berlin
0
--
--
--
XPS surface chemical analysis of aqueous solutions with EnviroESCA
Water and aqueous reagents are essential in any biological process or system. But apart from a few special low vapor-pressure cases, liquids have not been accessible to any technique requiring UHV conditions. EnviroESCA opens up this exciting field of applications.
In this paper first results from water based samples are presented as a proof of concept to demonstrate the special capabilities of EnviroESCA analyzing liquid samples. The following solutions were investigated under near ambient pressure conditions: i.) water, ii.) brine, iii.) an oil in water dispersion, iv.) aqueous iron(II) sulfate heptahydrate, and v.) a suspension of nano silver particles in water.
SPECS Application Notes
http://www.enviro.specs.de/cms/upload/bilder/EnviroESCA/Applications/Liquids/Application-Note_EnviroESCA_Aqueous_Solutions.pdf
urn:nbn:de:kobv:b43-394603
BAM Mitarbeiter Beitrag im Acknowledgement definiert.
Allgemeines Deutsches Urheberrecht
P. Dietrich
A. Thissen
N. Kulak
Marit Kjaervik
Wolfgang Unger
eng
uncontrolled
Surface Analysis
eng
uncontrolled
Near Ambient Pressure XPS
eng
uncontrolled
Aqueous Solutions
Analytische Chemie
Datei für die Öffentlichkeit verfügbar ("Open Access")
Graue Literatur
Wissenschaftliche Artikel der BAM
Bundesanstalt für Materialforschung und -prüfung (BAM)
https://opus4.kobv.de/opus4-bam/files/39460/Application-Note_EnviroESCA_Aqueous Solutions.pdf
42951
2017
eng
474002, 1
474002, 9
47
29
article
IOP Publishing
UK
Insitute of Physics
1
--
--
--
Detection of suspended nanoparticles with near-ambient pressure x-ray photoelectron spectroscopy
Two systems of suspended nanoparticles have been studied with near-ambient pressure x-ray photoelectron spectroscopy: silver nanoparticles in water and strontium fluoride—calcium fluoride core-shell nanoparticles in ethylene glycol. The corresponding dry samples were measured under ultra high vacuum for comparison. The results obtained under near-ambient pressure were overall comparable to those obtained under ultra high vacuum, although measuring silver nanoparticles in water requires a high pass energy and a long acquisition time. A shift towards higher binding energies was found for the silver nanoparticles in aqueous Suspension compared to the corresponding dry sample, which can be assigned to a change of surface potential at the water-nanoparticle interface. The shell-thickness of the core-shell nanoparticles was estimated based on simulated spectra from the National Institute of Standards and Technology database for simulation of electron spectra for surface analysis. With the instrumental set-up presented in this paper, nanoparticle suspensions in a suitable Container can be directly inserted into the analysis chamber and measured without prior sample preparation.
Journal of Physics: Condensed Matter
10.1088/1361-648X/aa8b9d
1361-648X
0953-8984
Geburtsname von Müller, Anja: Hermanns, A. - Birth name of Müller, Anja: Hermanns, A.
17.11.2017
Marit Kjaervik
Anja Müller
P. Dietrich
A. Thissen
S. Bahr
B. Ritter
E. Kemnitz
Wolfgang Unger
eng
uncontrolled
Nanoparticles
eng
uncontrolled
Suspensions
eng
uncontrolled
Core-shell nanoparticles
eng
uncontrolled
NAP-XPS
Analytische Chemie
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
28006
2013
eng
388
395
4
10
article
Wiley-VCH Verl.
Weinheim
1
--
--
--
Chemical characterization of the long-term ageing of nitrogen-rich plasma polymer films under various ambient conditions
Nitrogen rich plasma polymer films (L-PPE:N) were prepared by low-pressure RF plasma using a 1:1 mixture of ethylene and ammonia and aged for 345 d in four different ambient conditions: (i) at room temperature (RT) in air; (ii) at RT in nitrogen; (iii) at -20?°C in air and; (iv) at –20 °C in nitrogen. The films were analyzed by X-ray photoelectron spectroscopy (XPS) and by time-of-flight secondary ion mass spectrometry (ToF-SIMS) at various intervals over the duration of the experiment. The ageing of primary amines, NH2, was followed by chemical derivatization with 4-trifluoromethyl benzaldehyde. Storage at –20 °C, mostly independently of ambient atmosphere, slowed down ageing to almost undetectable levels as evaluated by the analytical methods used for this study.
Plasma processes and polymers
30849
10.1002/ppap.201200118
1612-8850
1612-8869
Sonderstandort: Publica-Schrank
11.04.2013
P.-L. Girard-Lauriault
Paul Dietrich
Thomas Gross
Thomas Wirth
Wolfgang Unger
eng
uncontrolled
Ageing
eng
uncontrolled
Plasma polymers
eng
uncontrolled
Primary amines
eng
uncontrolled
ToF-SIMS
eng
uncontrolled
XPS
Verlagsliteratur
Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
23554
2011
eng
4808
4815
8
27
article
American Chemical Society
Washington, DC
1
--
--
--
Adlayers of dimannoside thiols on gold: surface chemical analysis
Carbohydrate films on gold based on dimannoside thiols (DMT) were prepared, and a complementary surface chemical analysis was performed in detail by X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), near-edge X-ray absorption fine structure (NEXAFS), FT-IR, and contact angle measurements in order to verify formation of ω-carbohydrate-functionalized alkylthiol films. XPS (C 1s, O 1s, and S 2p) reveals information on carbohydrate specific alkoxy (C–O) and acetal moieties (O–C–O) as well as thiolate species attached to gold. Angle-resolved synchrotron XPS was used for chemical speciation at ultimate surface sensitivity. Angle-resolved XPS analysis suggests the presence of an excess top layer composed of unbound sulfur components combined with alkyl moieties. Further support for DMT attachment on Au is given by ToF-SIMS and FT-IR analysis. Carbon and oxygen K-edge NEXAFS spectra were interpreted by applying the building block model supported by comparison to data of 1-undecanethiol, poly(vinyl alcohol), and polyoxymethylene. No linear dichroism effect was observed in the angle-resolved C K-edge NEXAFS.
Langmuir
26135
10.1021/la104038q
0743-7463
1520-5827
21.04.2011
Paul Dietrich
T. Horlacher
Pierre-Luc Girard-Lauriault
Thomas Gross
Andreas Lippitz
Hyegeun Min
Thomas Wirth
R. Castelli
P.H. Seeberger
Wolfgang Unger
eng
uncontrolled
Carbohydrates
eng
uncontrolled
Self-assembled monolayer
eng
uncontrolled
XPS
eng
uncontrolled
NEXAFS
eng
uncontrolled
ToF-SIMS
eng
uncontrolled
Surface chemical analysis
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
54464
2022
eng
014008-1
1
29
article
AVS
1
--
--
--
NAP-XPS spectra of the bacterial cell-envelope of Pseudomonas fluorescens bacteria
Pseudomonas fluorescens (Gram-negative) bacteria purchased from Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures were analyzed using high-resolution x-ray photoelectron spectroscopy at near ambient pressure conditions (NAP-XPS), 1500 Pa water vapor atmosphere. Fresh layers of P. fluorescence bacteria were grown on Luria Broth agar plates. Bacteria were taken from the agar plate with a sterile spatula and gently spread on a Si-wafer piece for NAP-XPS analysis. The NAP-XPS spectra of the bacterial envelope of P. fluorescence were obtained using monochromatic Al Kα radiation and include a survey scan and high-resolution spectra of C 1s, N 1s, P 2p, and O 1s as well. The presentation of the C 1s high-resolution spectrum includes the results of peak fitting analysis.
Surface Science Spectra
10.1116/6.0001543
1055-5269
publish
14.03.2022
false
true
Marit Kjaervik
Karin Schwibbert
P.M. Dietrich
Wolfgang Unger
eng
uncontrolled
Pseudomonas fluorescens
eng
uncontrolled
Cell-envelope
eng
uncontrolled
Water atmosphere
eng
uncontrolled
Near ambient x-ray photoelectron spectroscopy
eng
uncontrolled
NAP-XPS
Ingenieurwissenschaften und zugeordnete Tätigkeiten
4 Material und Umwelt
4.1 Biologische Materialschädigung und Referenzorganismen
6 Materialchemie
6.1 Oberflächen- und Dünnschichtanalyse
Material
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
21500
2010
eng
1188
1192
42
article
Wiley
Chichester
1
--
--
--
Surface analytical characterization of carbohydrate microarrays
Microarrays are a versatile platform for diagnostics and high-throughput analysis. Carbohydrate microarrays are valuable tools to investigate interactions with other molecules since many glycans are involved in fundamental biological processes. A combined X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) surface analysis was used to investigate the basic steps in the production of carbohydrate microarrays. The preparation included coupling of a thiol-terminated mannoside to maleimide-functionalized glass surfaces derived from γ-aminopropyl silane (GAPS) slides. XPS results clearly demonstrate successful chemical modification in each fabrication step, and ToF-SIMS imaging revealed immobilized carbohydrates in the spotted regions of the final microarray.
Surface and interface analysis
23920
10.1002/sia.3255
0142-2421
1096-9918
Sonderstandort: Publica-Schrank
24.06.2010
Paul Dietrich
T. Horlacher
Thomas Gross
Thomas Wirth
R. Castelli
A.G. Shard
M. Alexander
P.H. Seeberger
Wolfgang Unger
eng
uncontrolled
Carbohydrates
eng
uncontrolled
Microarrays
eng
uncontrolled
XPS
eng
uncontrolled
ToF-SIMS
eng
uncontrolled
Nona-mannoside
eng
uncontrolled
Maleimide surfaces
eng
uncontrolled
Surface analysis
Verlagsliteratur
Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
35114
2015
eng
953
967
9
12
article
Wiley-VCH Verl.
Weinheim
1
--
--
--
Innovative and established strategies for the surface analysis of nitrogen and oxygen-rich plasma polymer films by XPS: an introductory guide
Nitrogen- and oxygen-based plasma polymer films are materials with a complex and partially elusive surface chemistry. We present an overview of innovative and established X-ray photoelectron spectroscopy (XPS)-based analysis strategies developed to elucidate the surface chemistry of such films. We focus on both experimental methods and data analysis strategies and include the following topics: high-resolution spectra curve fitting, aging, chemical derivatization, and depth profiling by angle- and energy-resolved XPS.
Plasma processes and polymers
38267
10.1002/ppap.201500115
1612-8850
1612-8869
16.12.2015
P.-L. Girard-Lauriault
Wolfgang Unger
Paul Dietrich
A. Holländer
eng
uncontrolled
Chemical derivatization
eng
uncontrolled
Functional groups
eng
uncontrolled
Plasma polymerization
eng
uncontrolled
X-ray photoelectron spectroscopy
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")