TY - JOUR
T1 - Nanoparticle-electrode collision studies
T2 - Brownian motion and the timescale of nanoparticle oxidation
AU - Dickinson, E.J.F.
AU - Rees, N.V.
AU - Compton, R.G.
N1 - Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/3/1
Y1 - 2012/3/1
N2 - A theoretical model is developed for the oxidation of a nanoparticle impinging on an electrode held at a suitably oxidising potential. The model incorporates Brownian motion to account for the experimentally observed timescale of such reactions. Comparison with a naive model neglecting Brownian motion allows the effects of nanoparticle size and the rate of electrochemical reaction to be determined. The overall rate of reaction is parameterised by an apparent electrochemical 'velocity' which must be <10 -3 m s -1 to account for millisecond timescale amperometric events. Partial oxidation events are found to be statistically unlikely, justifying quantitative analysis of experimental results.
AB - A theoretical model is developed for the oxidation of a nanoparticle impinging on an electrode held at a suitably oxidising potential. The model incorporates Brownian motion to account for the experimentally observed timescale of such reactions. Comparison with a naive model neglecting Brownian motion allows the effects of nanoparticle size and the rate of electrochemical reaction to be determined. The overall rate of reaction is parameterised by an apparent electrochemical 'velocity' which must be <10 -3 m s -1 to account for millisecond timescale amperometric events. Partial oxidation events are found to be statistically unlikely, justifying quantitative analysis of experimental results.
UR - http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-84857361852&md5=1b1adc2c8c526ef35005ae34eaec3d25
U2 - 10.1016/j.cplett.2012.01.036
DO - 10.1016/j.cplett.2012.01.036
M3 - Article
AN - SCOPUS:84857361852
SN - 0009-2614
VL - 528
SP - 44
EP - 48
JO - Chemical Physics Letters
JF - Chemical Physics Letters
ER -