A nanomechanical device based on linear molecular motors (original) (raw)
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Research Article| November 29 2004
Mechanical and Aerospace Engineering Department and the Institute for Cell Mimetic Space Exploration, University of California
, 420 Westwood Plaza, Los Angeles, California 90095
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Mechanical and Aerospace Engineering Department and the Institute for Cell Mimetic Space Exploration, University of California
, 420 Westwood Plaza, Los Angeles, California 90095
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Mechanical and Aerospace Engineering Department and the Institute for Cell Mimetic Space Exploration, University of California
, 420 Westwood Plaza, Los Angeles, California 90095
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Department of Chemistry and Biochemistry and the California NanoSystems Institute, University of California
, 405 Hilgard Avenue, Los Angeles, California 90095-1596
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Department of Chemistry and Biochemistry and the California NanoSystems Institute, University of California
, 405 Hilgard Avenue, Los Angeles, California 90095-1596
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Department of Chemistry and Biochemistry and the California NanoSystems Institute, University of California
, 405 Hilgard Avenue, Los Angeles, California 90095-1596
Search for other works by this author on:
Department of Chemistry and Biochemistry and the California NanoSystems Institute, University of California
, 405 Hilgard Avenue, Los Angeles, California 90095-1596
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Department of Chemistry and Biochemistry and the California NanoSystems Institute, University of California
, 405 Hilgard Avenue, Los Angeles, California 90095-1596
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Veeco Instruments, 112 Robin Hill Road, Santa Barbara
, California 93117
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Veeco Instruments, 112 Robin Hill Road, Santa Barbara
, California 93117
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Authors to whom correspondence should be addressed.
Electronic mail: chihming@seas.ucla.edu
Electronic mail: stoddart@chem.ucla.edu
Appl. Phys. Lett. 85, 5391–5393 (2004)
An array of microcantilever beams, coated with a self-assembled monolayer of bistable, redox-controllable [3]rotaxane molecules, undergoes controllable and reversible bending when it is exposed to chemical oxidants and reductants. Conversely, beams that are coated with a redox-active but mechanically inert control compound do not display the same bending. A series of control experiments and rational assessments preclude the influence of heat, photothermal effects, and pH variation as potential mechanisms of beam bending. Along with a simple calculation from a force balance diagram, these observations support the hypothesis that the cumulative nanoscale movements within surface-bound “molecular muscles” can be harnessed to perform larger-scale mechanical work.
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See EPAPS Document No.E-APPLAB-85-020448 for a full description of molecular modeling studies, molecular force calculations, beam bending calculations, and control experiments. A direct link to this document may be found in the online article’s HTML reference section. The document may also be reached via the EPAPS homepage (http:∕∕www.aip.org∕pubservs∕epaps.html) or from ftp.aip.org in the directory∕epaps∕. See the EPAPS homepage for more information.
We are aware that the disulfide tether or the underlying gold atoms to which they are attached might be migrating within each cycle.
© 2004 American Institute of Physics.
2004
American Institute of Physics
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