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Title: Uncoated microcantilevers as chemical sensors

Abstract

A method and device are provided for chemical sensing using cantilevers that do not use chemically deposited, chemically specific layers. This novel device utilizes the adsorption-induced variation in the surfaces states on a cantilever. The methodology involves exciting charge carriers into or out of the surface states with photons having increasing discrete levels of energy. The excitation energy is provided as discrete levels of photon energy by scanning the wavelength of an exciting source that is illuminating the cantilever surface. When the charge carriers are excited into or out of the surface states, the cantilever bending changes due to changes in surface stress. The amount of cantilever bending with respect to an identical cantilever as a function of excitation energy is used to determine the energy levels associated with adsorbates.

Inventors:
 [1]
  1. (Knoxville, TN)
Issue Date:
Research Org.:
LOCKHEED MARTIN ENERGY RES COR
OSTI Identifier:
873654
Patent Number(s):
6212939
Assignee:
Lockheed Martin Energy Research Corporation (Oak Ridge, TN) ORNL
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
uncoated; microcantilevers; chemical; sensors; method; device; provided; sensing; cantilevers; chemically; deposited; specific; layers; novel; utilizes; adsorption-induced; variation; surfaces; cantilever; methodology; involves; exciting; charge; carriers; surface; photons; increasing; discrete; levels; energy; excitation; photon; scanning; wavelength; source; illuminating; excited; bending; changes; due; stress; amount; respect; identical; function; determine; associated; adsorbates; charge carrier; chemical sensing; photon energy; chemical sensors; excitation energy; charge carriers; chemical sensor; device utilizes; energy level; energy levels; chemically deposited; novel device; coated microcantilever; /73/250/422/

Citation Formats

Thundat, Thomas G. Uncoated microcantilevers as chemical sensors. United States: N. p., 2001. Web.
Thundat, Thomas G. Uncoated microcantilevers as chemical sensors. United States.
Thundat, Thomas G. Mon . "Uncoated microcantilevers as chemical sensors". United States. https://www.osti.gov/servlets/purl/873654.
@article{osti_873654,
title = {Uncoated microcantilevers as chemical sensors},
author = {Thundat, Thomas G.},
abstractNote = {A method and device are provided for chemical sensing using cantilevers that do not use chemically deposited, chemically specific layers. This novel device utilizes the adsorption-induced variation in the surfaces states on a cantilever. The methodology involves exciting charge carriers into or out of the surface states with photons having increasing discrete levels of energy. The excitation energy is provided as discrete levels of photon energy by scanning the wavelength of an exciting source that is illuminating the cantilever surface. When the charge carriers are excited into or out of the surface states, the cantilever bending changes due to changes in surface stress. The amount of cantilever bending with respect to an identical cantilever as a function of excitation energy is used to determine the energy levels associated with adsorbates.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

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