Issue 9, 2016

Stochastic detection and characterisation of individual ferrocene derivative tagged graphene nanoplatelets

Abstract

Graphene nanoplatelets (GNPs) are ‘tagged’ with 1-(biphen-4-yl)ferrocene. Chronoamperometry is then utilised to observe single particle impacts when GNPs suspended in solution collide with a carbon fibre micro wire electrode held at an oxidising potential, resulting in current/time transient “spikes”. The impacts are associated with two types of charge transfer: Faradaic due to oxidation of the ‘tag’ and capacitative due to disruption of the double layer. Analysis of the spikes suggests approximate monolayer coverage of 1-(biphen-4-yl)ferrocene on the GNP surfaces, with a surface coverage of (2.2 ± 0.3) × 10−10 mol cm−2. In contrast non-derivatised ferrocene does not exhibit any significant adsorption on the GNP material.

Graphical abstract: Stochastic detection and characterisation of individual ferrocene derivative tagged graphene nanoplatelets

Supplementary files

Article information

Article type
Paper
Submitted
11 十二月 2015
Accepted
26 一月 2016
First published
27 一月 2016

Analyst, 2016,141, 2696-2703

Stochastic detection and characterisation of individual ferrocene derivative tagged graphene nanoplatelets

H. Wu, Q. Lin, C. Batchelor-McAuley, L. M. Gonçalves, C. F. R. A. C. Lima and R. G. Compton, Analyst, 2016, 141, 2696 DOI: 10.1039/C5AN02550H

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