Electrical Characterization and Analysis of Carbon Nanotube-Peptide Nucleic Acid Conjugates

Authors: Singh, Krishna V.; Martinez-Morales, Alfredo; Jing, Xiaoye; Ozkan, Mihrimah; Ozkan, Cengiz S.; Liu, Fie; Wang, Kang L.

Source: Journal of Nanoelectronics and Optoelectronics, Volume 2, Number 2, August 2007 , pp. 205-208(4)

Publisher: American Scientific Publishers

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Abstract:

We report for the first time electron transport measurements of covalently functionalized single-walled-carbon-nanotubes (SWNT) with peptide-nucleic-acid (PNA). Individual SWNT-PNA-SWNT conjugates were tested by aligning them across pre-patterned gold microelectrodes. Corresponding analysis reveal that these conjugates exhibit negative differential resistance (NDR) that is characteristics of resonant tunneling diodes (RTD). The NDR behavior was observed only in SWNT-PNA conjugates and not individually in SWNTs or PNA alone, making them suitable candidates for future molecular electronics. This NDR behavior can be attributed to the type of molecular bonding between peptide and SWNT and alignment of their band energies.

Keywords: SWNT; MOLECULAR ELECTRONICS; PNA; NDR

Document Type: Short communication

DOI: http://dx.doi.org/10.1166/jno.2007.207

Publication date: 2007-08-01

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Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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