title: Carbon nanotubes grown on stainless steel to form plate and probe electrodes for chemical/biological sensing.
abstract: This paper describes the fabrication and evaluation of carbon nanotube (CNT) electrodes grown on stainless steel (SS) plate and wire for electrochemical sensor applications. Multi-wall carbon nanotubes with different diameters were grown on the SS plate and wire by chemical vapor deposition from an ethylene precursor. The SS provides a good electrical and mechanical connection to the CNT, and the SS is a tough substrate. The SS part of the electrode was electrically insulated from the analyte so that only the CNT were active in sensing. Cyclic voltammetry for the reduction of 6 mM K3Fe(CN)6 in a 1.0 M KNO3 supporting electrolyte was performed to examine the redox behavior of the CNT-SS electrode. The cyclic voltammograms showed sigmoidal-like shapes, indicating that mass transport around the electrodes is dominated by radial diffusion. Based on the cyclic voltammograms, the effective area of the CNT-SS electrodes and the number of individual CNTs were estimated. These results indicate that the CNT-SS plate and wire electrodes are good candidates to develop practical in vivo biosensors.
authors: Department of Mechanical, Industrial and Nuclear Engineering, Smart Materials Nanotechnology Laboratory, University of Cincinnati, Cincinnati, OH 45221-0172, USA.
authors: Yeoheung
authors: Y
authors: Yun
authors: Ram
authors: R
authors: Gollapudi
authors: Vesselin
authors: V
authors: Shanov
authors: Mark J
authors: MJ
authors: Schulz
authors: Zhongyun
authors: Z
authors: Dong
authors: Abdul
authors: A
authors: Jazieh
authors: William R
authors: WR
authors: Heineman
authors: H Brian
authors: HB
authors: Halsall
authors: Danny K Y
authors: DK
authors: Wong
authors: Adam
authors: A
authors: Bange
authors: Yi
authors: Y
authors: Tu
authors: Srinivas
authors: S
authors: Subramaniam
mesh_terms: D015374:Biosensing Techniques; D004563:Electrochemistry; D008839:Microelectrodes; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology; D037742:Nanotubes, Carbon / Q000648:ultrastructure*; D053770:Nanowires / Q000648:ultrastructure; D013193:Stainless Steel
chemical_list: D037742:Nanotubes, Carbon; D013193:Stainless Steel