Capping agent promoted oxidation of gold nanoparticles: cetyl trimethylammonium bromide

Capping agents, key for nanoparticle stability, may hugely influence chemical behaviour. We show that differently capped gold nanoparticles, with either citrate or cetyl trimethylammonium bromide (CTAB) capping agents, show qualitatively different electron transfer properties. Specifically through c...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2015-01, Vol.17 (39), p.26054-26058
Main Authors: Plowman, Blake J, Tschulik, Kristina, Young, Neil P, Compton, Richard G
Format: Article
Language:English
Subjects:
Bromides
Capping
Charge transfer
Citrates
Gold
Nanoparticles
Nanostructure
Voltammetry
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Summary:Capping agents, key for nanoparticle stability, may hugely influence chemical behaviour. We show that differently capped gold nanoparticles, with either citrate or cetyl trimethylammonium bromide (CTAB) capping agents, show qualitatively different electron transfer properties. Specifically through cyclic voltammetry and nanoimpact studies the CTAB promoted dissolution of gold nanoparticles is shown, highlighting the active role which capping agents can play in charge transfer.
ISSN:1463-9076
1463-9084
DOI:10.1039/c5cp05146k