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Functionalized nanoparticles in aqueous surroundings probed by X-ray photoelectron spectroscopy

Soderstrom, Johan; Ottosson, Niklas; Pokapanich, Wandared; Öhrwall, Gunnar LU and Bjorneholm, Olle (2011) In Journal of Electron Spectroscopy and Related Phenomena 184(7). p.375-378
Abstract
In this paper we present the first core-level photoelectron spectroscopic study of solid nanoparticles in liquid water. The particles are SiO2-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 SiO2-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. (C) 2011 Elsevier... (More)
In this paper we present the first core-level photoelectron spectroscopic study of solid nanoparticles in liquid water. The particles are SiO2-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 SiO2-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. (C) 2011 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Nanoparticle, Soft X-ray, Photoelectron spectroscopy, Liquid colloid, Liquid micro-jet
in
Journal of Electron Spectroscopy and Related Phenomena
volume
184
issue
7
pages
375 - 378
publisher
Elsevier
external identifiers
  • wos:000293314800005
  • scopus:79959840293
ISSN
0368-2048
DOI
10.1016/j.elspec.2011.02.006
language
English
LU publication?
yes
id
4ff4f42c-65df-4ff1-85a3-098eeef31073 (old id 2072054)
date added to LUP
2011-08-29 09:08:55
date last changed
2017-05-28 04:06:32
@article{4ff4f42c-65df-4ff1-85a3-098eeef31073,
  abstract     = {In this paper we present the first core-level photoelectron spectroscopic study of solid nanoparticles in liquid water. The particles are SiO2-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 SiO2-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. (C) 2011 Elsevier B.V. All rights reserved.},
  author       = {Soderstrom, Johan and Ottosson, Niklas and Pokapanich, Wandared and Öhrwall, Gunnar and Bjorneholm, Olle},
  issn         = {0368-2048},
  keyword      = {Nanoparticle,Soft X-ray,Photoelectron spectroscopy,Liquid colloid,Liquid micro-jet},
  language     = {eng},
  number       = {7},
  pages        = {375--378},
  publisher    = {Elsevier},
  series       = {Journal of Electron Spectroscopy and Related Phenomena},
  title        = {Functionalized nanoparticles in aqueous surroundings probed by X-ray photoelectron spectroscopy},
  url          = {http://dx.doi.org/10.1016/j.elspec.2011.02.006},
  volume       = {184},
  year         = {2011},
}