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Functionalized nanoparticles in aqueous surroundings probed by X-ray photoelectron spectroscopy
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Surface and Interface Science.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Surface and Interface Science.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Surface and Interface Science.
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2011 (English)In: Journal of Electron Spectroscopy and Related Phenomena, ISSN 0368-2048, E-ISSN 1873-2526, Vol. 184, no 7, 375-378 p.Article in journal (Refereed) Published
Abstract [en]

In this paper we present the first core-level photoelectron spectroscopic study of solid nanoparticles in liquid water. The particles are SiO(2)-based with an average diameter of 70 nm and functionalized with carboxylic groups. Despite that the sample is very dilute, we show that it is possible to obtain reasonable photoemission signal containing chemical information about both the ligands and the outermost parts of the SiO(2)-based core of the nanoparticles. We argue that this is due to a significant enrichment of the dispersed particles at the liquid/vapor interface. This proof-of-principle study expands the field of X-ray photoelectron spectroscopy by adding a new, wide and important class of systems that can be studied.

Place, publisher, year, edition, pages
2011. Vol. 184, no 7, 375-378 p.
Keyword [en]
Nanoparticle, Soft X-ray, Photoelectron spectroscopy, Liquid colloid, Liquid micro-jet
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-157049DOI: 10.1016/j.elspec.2011.02.006ISI: 000293314800005OAI: oai:DiVA.org:uu-157049DiVA: diva2:434365
Available from: 2011-08-15 Created: 2011-08-15 Last updated: 2017-12-08Bibliographically approved

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Söderström, Johan

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