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000010597 0247_ $$2DOI$$a10.1016/j.susc.2010.10.025
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000010597 041__ $$aeng
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000010597 084__ $$2WoS$$aChemistry, Physical
000010597 084__ $$2WoS$$aPhysics, Condensed Matter
000010597 1001_ $$0P:(DE-Juel1)VDB5414$$aIbach, H.$$b0$$uFZJ
000010597 245__ $$aInterface capacitance of nano-patterned electrodes
000010597 260__ $$aAmsterdam$$bElsevier$$c2011
000010597 300__ $$a
000010597 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000010597 440_0 $$05673$$aSurface Science$$v605$$x0039-6028$$y1
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000010597 520__ $$aBy employing numerical solutions of the Poisson-Boltzmann equation we have studied the interface capacitance of flat electrodes with stripes of different potentials of zero charge phi(pzc). The results depend on the ratio of the width of the stripes l to the dielectric screening length in the electrolyte, the Debye length d(Debye), as well as on the difference Delta phi(pzc), in relation k(B)T/e. As expected, the capacitance of a striped surface has its minimum at the mean potential of the surface if l/d(Debye)<< 1 and displays two minima if l/d(Debye)>> 1. An unexpected result is that for Delta phi(pzc)congruent to 0.2V, the transition between the two extreme cases does not occur when l congruent to d(Debye). but rather when l>10d(Debye). As a consequence, a single minimum in the capacitance is observed for dilute electrolytes even for 100 nm wide stripes. The capacitance at the minimum is however higher than for homogeneous surfaces. Furthermore, the potential at the minimum deviates significantly from the potential of zero mean charge on the surface if l>3d(Debye) and Delta phi(pzc) is larger than about 4k(B)T/e. The capacitance of stepped, partially reconstructed Au(11n) surfaces is discussed as an example. Consequences for Parsons-Zobel-plots of the capacitances of inhomogeneous surfaces are likewise discussed. (C) 2010 Elsevier B.V. All rights reserved.
000010597 536__ $$0G:(DE-Juel1)FUEK505$$2G:(DE-HGF)$$aBioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung$$cP45$$x0
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000010597 65320 $$2Author$$aMetal-electrolyte interface
000010597 65320 $$2Author$$aNano-structured surfaces
000010597 65320 $$2Author$$aDielectric properties
000010597 7001_ $$0P:(DE-Juel1)128800$$aBeltramo, G. L.$$b1$$uFZJ
000010597 7001_ $$0P:(DE-Juel1)4744$$aGiesen, M.$$b2$$uFZJ
000010597 773__ $$0PERI:(DE-600)1479030-0$$a10.1016/j.susc.2010.10.025$$gVol. 605$$q605$$tSurface science$$v605$$x0039-6028$$y2011
000010597 8567_ $$uhttp://dx.doi.org/10.1016/j.susc.2010.10.025
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000010597 9131_ $$0G:(DE-Juel1)FUEK505$$bSchlüsseltechnologien$$kP45$$lBiologische Informationsverarbeitung$$vBioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung$$x0
000010597 9132_ $$0G:(DE-HGF)POF3-551$$1G:(DE-HGF)POF3-550$$2G:(DE-HGF)POF3-500$$aDE-HGF$$bKey Technologies$$lBioSoft  Fundamentals for future Technologies in the fields of Soft Matter and Life Sciences$$vFunctional Macromolecules and Complexes$$x0
000010597 9141_ $$y2011
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000010597 9201_ $$0I:(DE-Juel1)VDB802$$d31.12.2010$$gIBN$$kIBN-4$$lBiomechanik$$x0
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