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000025855 0247_ $$2DOI$$a10.1016/S0039-6028(02)01554-6
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000025855 041__ $$aeng
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000025855 084__ $$2WoS$$aChemistry, Physical
000025855 084__ $$2WoS$$aPhysics, Condensed Matter
000025855 1001_ $$0P:(DE-Juel1)VDB8642$$aBombis, C.$$b0$$uFZJ
000025855 245__ $$aAbsolute surface free energies of Pb
000025855 260__ $$aAmsterdam$$bElsevier$$c2002
000025855 300__ $$a83 - 96
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000025855 520__ $$aThree-dimensional (3D) equilibrium crystal shapes (ECS) of Pb are utilized for the first time to determine absolute surface free energies via a quantitative evaluation of the measured ECS and published values of step free energies of vicinal (1 1 1) surfaces. 3D images of Pb crystallites are obtained by scanning tunneling microscopy at 323-393 K. Line scans through high symmetry <1 1 0> azimuths are transformed into an anisotropic relative surface free energy, gamma(theta, T). The absolute surface free energy of Pb(1 1 1) is obtained from the limiting slopes, df(theta, T)/d tan theta, of the orientation dependent f(theta, T) gamma(theta, T)/ cos theta at the boundaries of the (1 1 1) facet, located at theta = 0degrees. This value is 25.7 +/- 1.4 meV/Angstrom(2) or 440 +/- 22 mJ/m(2). Absolute surface free energies of other low-index orientations, such as (1 0 0), (1 1 0) etc. are calculated from the relative anisotropy of gamma(theta)/gamma(1 1 1). It is found that surface free energies of orientation (h k l), expressed in meV/atom, scale with the number of bonds broken in forming such a surface. Free energies of steps bounding other facets, such as (1 0 0), (1 1 0), (1 1 2), (1 1 3) and (2 2 1), are evaluated in the [0 1 (1) over bar] zone, using the corresponding facet radii and the absolute surface free energies of those facets. (C) 2002 Published by Elsevier Science B.V.
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000025855 65320 $$2Author$$aequilibrium thermodynamics and statistical mechanics
000025855 65320 $$2Author$$ascanning tunneling microscopy
000025855 65320 $$2Author$$asurface energy
000025855 65320 $$2Author$$asurface structure, morphology, roughness, and topography
000025855 65320 $$2Author$$alead
000025855 7001_ $$0P:(DE-Juel1)VDB5552$$aEmundts, A.$$b1$$uFZJ
000025855 7001_ $$0P:(DE-Juel1)VDB5549$$aNowicki, M.$$b2$$uFZJ
000025855 7001_ $$0P:(DE-Juel1)VDB5490$$aBonzel, D. I.$$b3$$uFZJ
000025855 773__ $$0PERI:(DE-600)1479030-0$$a10.1016/S0039-6028(02)01554-6$$gVol. 511, p. 83 - 96$$p83 - 96$$q511<83 - 96$$tSurface science$$v511$$x0039-6028$$y2002
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000025855 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
000025855 9201_ $$0I:(DE-Juel1)VDB43$$d31.12.2006$$gISG$$kISG-3$$lInstitut für Grenzflächen und Vakuumtechnologien$$x0
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