Nano Archive

Chemoselective nanowire fuses: Chemically induced cleavage and electrical, detection of carbon nanofiber bridges

Li, Bo and Shang, Lu and Marcus, Matthew S. and Clare, Tarni Lasseter and Perkins, Edward and Hamers, Robert J. (2008) Chemoselective nanowire fuses: Chemically induced cleavage and electrical, detection of carbon nanofiber bridges. SMALL, 4 (6). pp. 795-801.

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Official URL: http://www3.interscience.wiley.com/journal/1198164...

Abstract

A new type of nanoscale bioswitch based on the electrical detection of chemically induced cleavage of chemical bonds, which bind individual nanowires across a pair of electrodes is demonstrated. Carbon nanofibers are manipulated using dielectrophoresis to form single-nanowire bridges across microelectrode junctions, and are anchored through a biomolecular interaction. Once in place, chemically induced cleavage of a recognition site along the bonds linking the nanowire to the electrodes allows the nanowire to be easily removed by a flow of fluid; this removal can be detected in real time via changes in the AC electrical response. This form of sensing is inherently digital in nature as the removal of a single nanowire produces a sudden decrease in the current between electrodes and is essentially a chemoselective fuse. These results suggest that this sensing principle could be a general method for digital chemical and/or biological sensing using individual nanowires.

Item Type:Article
Uncontrolled Keywords:biosensors; disulfides; molecular recognition; nanoelectronics; switches
Subjects:Analytical Science > Nanotechnology for sensing and actuating
Physical Science > Nanoelectronics
Biomedical Science > Nanobiotechnology
Material Science > Nanostructured materials
ID Code:1221
Deposited By:Anuj Seth
Deposited On:16 Dec 2008 11:20
Last Modified:19 Jan 2009 11:41

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