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Nanocantilever Signal Transduction by Electron Transfer

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Abstract:

Microfabricated cantilever beams promise to bring about a revolution in the field of chemical, physical, and biological sensor development. The resonance frequency of a microfabricated cantilever shifts sensitively because of mass loading from molecular adsorption. The minimum detectable adsorbed mass on a cantilever sensor can be increased by orders of magnitude by changing the dimensions of the device; smaller and thicker cantilevers offer higher resonance frequency and therefore better mass detection sensitivity. Here we describe micromachined silicon cantilevers that are 0.5 to 4 m in length, fabricated with the use of a focused ion beam (FIB). In addition, we demonstrate a technique for detection of the cantilever resonance frequency that is based on electron transfer.

Keywords: ELECTRON TRANSFER; FOCUSED ION BEAM; MICROMACHINING; NANOCANTILEVERS; RESONANCE FREQUENCY

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2002.091

Affiliations: Life Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA; University of Tennessee, Knoxville, Tennessee 37996-1200, USA

Publication date: July 1, 2002

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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