A robust VACNF platform for electrochemical biosensor

Author

Al Mamun, Khandaker A. ; Tulip, Fahmida S. ; MacArthur, Kimberly ; McFarlane, Nicole ; Islam, Syed K. ; Hensley, Dale ; Kravchenko, I.I.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of Tennessee, Knoxville, TN, USA

fYear

2013

fDate

3-6 Nov. 2013

Firstpage

1

Lastpage

4

Abstract

Vertically aligned carbon nanofiber (VACNF) is a promising electrode structure for electrochemical biosensor platform. In this paper, we address the mechanical stability and reusability issues of VACNF arrays. We demonstrate that improvement in mechanical stability requires special attention to surface treatment. We show that a thin SU8 layer on nanofiber forest forms a flexible passive layer at the base of the array and that wet etching works best to remove the passive layer from the VACNF tips. The optimum time for wet etching was found to be 2-3 minutes. We show that SU8 treated VACNF arrays have improved signal-to-noise response compared to the untreated bare VACNF arrays.

Keywords

biosensors; carbon fibres; electrochemical electrodes; electrochemical sensors; nanofibres; nanosensors; surface treatment; C; SU8 layer; electrochemical biosensor; electrode structure; nanofiber forest; passive layer; robust VACNF platform; surface treatment; vertically aligned carbon nanofiber; Carbon; Electrodes; Optical fiber devices; Optical fiber testing; Passivation; Substrates;

fLanguage

English

Publisher

ieee

Conference_Titel

SENSORS, 2013 IEEE

Conference_Location

Baltimore, MD

ISSN

1930-0395

Type

conf

DOI

10.1109/ICSENS.2013.6688578

Filename

6688578