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Dual Electrode Ensembles with Core and Shell Nanoelectrodes for Dopamine Sensing Applications
Author(s) -
Yoon Hargsoon,
Hankins Phillip T.,
Varadan Vijay K.,
Harbaugh Robert E.
Publication year - 2008
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200704148
Subject(s) - electrode , materials science , dopamine , core (optical fiber) , dual (grammatical number) , electrochemistry , nanotechnology , nanowire , voltage , fabrication , optoelectronics , chemistry , composite material , physics , medicine , art , literature , alternative medicine , pathology , neuroscience , biology , quantum mechanics
Abstract This paper presents the fabrication of dual electrode ensembles for electrochemical sensing of dopamine. A new dual electrode ensemble consists of vertically aligned core nanowire electrodes and a shell electrode with a hemi‐cylindrical nanocavity structure and submicron inter‐electrode spacing between the two working electrodes. By using a 3‐dimensional cavity structure of two working electrodes, collection efficiency in redox cycling of dopamine is enhanced. Initial measurement results show the ability to detect 200 μM concentration of dopamine with 69% collection efficiency on a dual electrode ensemble.