Wellsted, H., Sitsen, E., Caragheorgheopo, A. et al. (1 more author) (2004) Polydisperse composition of mixed monolayer-protected, spin-labeled Au nanoparticles. Analytical Chemistry, 76 (7). pp. 2010-2016. ISSN 0003-2700
Abstract
Using EPR spectroscopy and spin-labeled ligands, we have studied product distribution in the ligand exchange reactions of Au nanoparticles. When the incoming ligand was used in excess, the exchanged nanoparticles had uniform composition of the organic shell. Preparative GPC was employed to fractionate these materials according to the diameter of the Au core, as confirmed by TEM, UV, and EPR measurements. When the exchange reaction was carried out with less than a stoichiometric amount of the incoming ligand, nanoparticles with polydisperse composition of the organic shell were formed. This was established by the EPR analysis of the exchange reaction mixtures following their GPC fractionation. The GPC separation of these mixtures is controlled by both Au core size and shell composition.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | York RAE Import |
Date Deposited: | 12 Aug 2009 15:57 |
Last Modified: | 12 Aug 2009 15:57 |
Published Version: | http://dx.doi.org/10.1021/ac035465x |
Status: | Published |
Publisher: | ACS American Chemical Society |
Identification Number: | 10.1021/ac035465x |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:5478 |