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Conductance Microscopy for Electric Conduction Study of Bio-Inspired Hybrid Nanostructures under Ambient Conditions

Published online by Cambridge University Press:  11 February 2011

Wahyu Setyawan ,
Saleem Rao  and
Seunghun Hong
Wahyu Setyawan
Affiliation:
Physics, Center for Material Research and Technology, and Institute of Molecular Biophysics, Florida State University, Tallahassee, FL 32306–4351, U.S.A.
Saleem Rao
Affiliation:
Physics, Center for Material Research and Technology, and Institute of Molecular Biophysics, Florida State University, Tallahassee, FL 32306–4351, U.S.A.
Seunghun Hong
Affiliation:
Physics, Center for Material Research and Technology, and Institute of Molecular Biophysics, Florida State University, Tallahassee, FL 32306–4351, U.S.A.
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Abstract

Electrical conductance of single stranded DNA (5′-TTT TTT TTT T/3 Thio MC3-D/-3′) monolayer patterns on Au surface is compared with those of various organic molecular patterns via the conductance microscope (CM) technique that allows one to take nanoscale conductance images utilizing a conducting AFM tip in contact mode AFM. In the experiment, reference molecules and ssDNA are patterned on the same substrate via direct deposition methods such as dip-pen nanolithography and microcontact printing. Then, conductance microscope image is recorded revealing the relative conductivity of ssDNA patterns relative to various reference molecules. 16-mercaptohexadecanoic acid and 2-mercaptobenzimidazole patterns are found conducting better than the ssDNA patterns. This result indicates that the ssDNA with 10T bases is a relatively poor electrical conductor. The capabilities of CM technique are also tested on various nanostructures including the single wall carbon nanotube junction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 735: Symposium C – Bioinspired Nanoscale Hybrid Systems , 2002 , C1.4
Copyright
Copyright © Materials Research Society 2003

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References

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