We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
XPS Examination of the Chemical Composition of PEGMUA‐Coated Gold Nanoparticles.
- Authors
Hepperle, Philine; Herman, Alexander; Khanbabaee, Behnam; Baek, Woon Yong; Nettelbeck, Heidi; Rabus, Hans
- Abstract
A surface chemical analysis of 12 nm diameter gold nanoparticles (AuNPs) coated with polyethylene glycol (PEG)‐11‐mercaptoundecanoic acid (MUA) is performed by means of X‐ray photoelectron spectroscopy (XPS). For this purpose, the PEGMUA‐coated AuNPs are deposited using two different deposition techniques, drop‐casting or spin‐coating, on a thin‐film carbon substrate. The measurements show that AuNPs are present in the +I oxidation state due to the synthesis process of the coated AuNPs, and in the Au(0) oxidation state. Carbon and oxygen contaminations are detected on both the coating surface and carbon substrate. While sputtering of the sample with argon enables the removal of carbon and oxygen contaminations, it also removes part of the coating on the sample surface. The two deposition methods, however, do not cause any chemical structural changes to the nanoparticles.
- Subjects
X-ray photoelectron spectroscopy; GOLD nanoparticles; SURFACE analysis; ANALYTICAL chemistry; POLYETHYLENE glycol; OXIDATION states
- Publication
Particle & Particle Systems Characterization, 2022, Vol 39, Issue 9, p1
- ISSN
0934-0866
- Publication type
Article
- DOI
10.1002/ppsc.202200070