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:
-
- Knoxville, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 873654
- Patent Number(s):
- 6212939
- Assignee:
- Lockheed Martin Energy Research Corporation (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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}
}
Works referenced in this record:
Microfabrication of cantilever styli for the atomic force microscope
journal, July 1990
- Albrecht, T. R.; Akamine, S.; Carver, T. E.
- Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 8, Issue 4