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 theTwo 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.…
Autor*innen: | Marit Kjaervik, Anja MüllerORCiD, P. Dietrich, A. Thissen, S. Bahr, B. Ritter, E. Kemnitz, Wolfgang UngerORCiD |
---|---|
Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Journal of Physics: Condensed Matter |
Jahr der Erstveröffentlichung: | 2017 |
Herausgeber (Institution): | Insitute of Physics |
Verlag: | IOP Publishing |
Verlagsort: | UK |
Jahrgang/Band: | 29 |
Ausgabe/Heft: | 47 |
Erste Seite: | 474002, 1 |
Letzte Seite: | 474002, 9 |
DDC-Klassifikation: | Naturwissenschaften und Mathematik / Chemie / Analytische Chemie |
Freie Schlagwörter: | Core-shell nanoparticles; NAP-XPS; Nanoparticles; Suspensions |
DOI: | 10.1088/1361-648X/aa8b9d |
ISSN: | 1361-648X |
ISSN: | 0953-8984 |
Bemerkung: | Geburtsname von Müller, Anja: Hermanns, A. - Birth name of Müller, Anja: Hermanns, A. |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 17.11.2017 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 17.11.2017 |