High-Resolution Sizing of Monolayer-Protected Gold Clusters by Differential Centrifugal Sedimentation



Krpetic, Zeljka, Davidson, Adam M, Volk, Martin ORCID: 0000-0003-3555-8584, Levy, Raphael ORCID: 0000-0001-5728-0531, Brust, Mathias ORCID: 0000-0001-6301-7123 and Cooper, David L ORCID: 0000-0003-0639-0794
(2013) High-Resolution Sizing of Monolayer-Protected Gold Clusters by Differential Centrifugal Sedimentation. ACS NANO, 7 (10). pp. 8881-8890.

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Krpetic et al - ACS Nano revised version.doc - Author Accepted Manuscript

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Abstract

Differential centrifugal sedimentation (DCS) has been applied to accurately size ligand-protected gold hydrosols in the 10 to 50 nm range. A simple protocol is presented to correct for particle density variations due to the presence of the ligand shell, which is formed here by either polyethylene glycol-substituted alkane thiols (PEG-alkane thiols) of different chain length or oligopeptides. The method gives reliable data for all particle sizes investigated and lends itself to rapid routine sizing of nanoparticles. Unlike TEM, DCS is highly sensitive to small changes in the thickness of the organic ligand shell and can be applied to monitor shell thickness variations of as little as 0.1 nm on particles of a given core size.

Item Type: Article
Additional Information: Times Cited: 9
Uncontrolled Keywords: gold hydrosols nanoparticles, differential centrifugal sedimentation (DCS), particle sizing, monolayer-protected clusters (MPCs), FTIR, peptide-capped nanoparticles
Depositing User: Symplectic Admin
Date Deposited: 15 Dec 2016 08:53
Last Modified: 19 Jan 2023 07:24
DOI: 10.1021/nn403350v
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3004888