Electrodeposition study of ODN : SWCNT hybrids on gold substrates

Roya R. Lahiji, Birck Nanotechnology Center, Pudue University
Bridget D. Dolash, Birck Nanotechnology Center, Pudue University
Jennifer McDonald, Purdue University - Calumet Campus
Dmitry Zemlyanov, Birck Nanotechnology Center, Pudue University
Donald E. Bergstrom, Birck Nanotechnology Center and Bindley Bioscience Center, Purdue University
R. Reifenberger, Birck Nanotechnology Center, Purdue University

Abstract

Sonication of short single-stranded DNA (oligodeoxyribonucleotide; ODN) with Single-Walled Carbon Nanotubes (SWCNTs) greatly facilitates the dispersion of SWCNTs from entangled ropes in an aqueous solution, creating ODN:SWCNT hybrids. Electrodeposition has been investigated to determine if well-dispersed ODN :SWCNT hybrids on a metal substrate can be created. Preliminary studies indicate that electrodeposition using an Au substrate held at +0.5 V produces ODN: SWCNT hybrids that are uniformly deposited across the Au substrate. This result can be compared to samples produced by drop casting and evaporation techniques which yield a thick tangled mat of ODN :SWCNT hybrids across the substrate. The resulting electrodeposited samples were characterized using Scanning Probe Microscope (SPM) and X-ray Photoemission Spectroscopy (XPS) techniques.

Discipline(s)

Nanoscience and Nanotechnology