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Dual Electrode Ensembles with Core and Shell Nanoelectrodes for Dopamine Sensing Applications |
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| Authors: | Hargsoon Yoon Phillip T Hankins Vijay K Varadan Robert E Harbaugh |
| Institution: | 1. Center for Nano‐, Neuro‐, Bio‐ and Infor‐ Tech Sensors and Systems, University of Arkansas, 700 Research Center Blvd., Fayetteville, AR 72701, USA;2. Department of Neurosurgery, College of Medicine, University of Arkansas for Medical Sciences, 4301 W. Markham St., Little Rock, AR 72205, USA;3. Department of Neurosurgery, College of Medicine, Pennsylvania State Hershey Medical Center, 500 University Dr., Hershey, PA 17033, USA |
| 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. |
| Keywords: | Dual electrode Ensembles Nanowire Redox cycle Dopamine |