Cylindrical nanopore electrode and its application to the study of electrochemical reaction in several hundred attoliter volume

Analytical Chemistry
Peng Sun

Abstract

A method to fabricate cylindrical nanopore electrodes is presented. The volume of the cavity formed in the cylindrical nanopore electrode can be as small as several hundred attoliters. It has been characterized by using scanning electron microscopy and electrochemical methods. Our results show that the radius of the cavity can affect the diffusion coefficient of a redox species in the cavity. The cylindrical nanopore electrode has also been used to study charge transfer across the interface between an aqueous phase of several hundred attoliters in volume and a bulk chloroform phase. Compared with the same charge-transfer reaction across the interface between a bulk aqueous phase and a bulk chloroform phase, the potential of the charge-transfer reaction has a negative shift. The effect of the phase ratio on the distribution of the supporting electrolyte in the aqueous and organic phases has been used to explain the shift.

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Citations

Aug 27, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Joshua P GuerretteBo Zhang
Apr 25, 2012·Annual Review of Analytical Chemistry·Jonathan T Cox, Bo Zhang
Oct 23, 2010·Nanoscale·Tao Li, Wenping Hu
Mar 11, 2011·Chemical Society Reviews·Shujuan LiuYuanhua Shao
Jul 9, 2010·Analytical Chemistry·Bikash Kumar JenaBo Zhang
Nov 6, 2012·Analytical Chemistry·Stephen M OjaBo Zhang

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