TITLE

Electrostatic force density for a scanned probe above a charged surface

AUTHOR(S)
Passian, A.; Wig, A.; Meriaudeau, F.; Buncick, M.; Thundat, T.; Ferrell, T. L.
PUB. DATE
July 2001
SOURCE
Journal of Applied Physics;7/15/2001, Vol. 90 Issue 2, p1011
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The Coulomb interaction of a dielectric probe tip with a uniform field existing above a semi-infinite, homogeneous dielectric substrate is studied. The induced polarization surface charge density and the field distribution at the bounding surface of the dielectric medium with the geometry of half of a two sheeted hyperboloid of revolution located above the dielectric half space interfaced with a uniform surface charge density is calculated. The force density on the hyperboloidal probe medium is calculated as a function of the probe tip shape. The calculation is based on solving Laplace’s equation and employing a newly derived integral expansion for the vanishing dielectric limit of the potential. The involved numerical simulations comprise the evaluation of infinite double integrals involving conical functions. © 2001 American Institute of Physics.
ACCESSION #
4759104

 

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