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000046889 084__ $$2WoS$$aChemistry, Multidisciplinary
000046889 084__ $$2WoS$$aChemistry, Physical
000046889 084__ $$2WoS$$aMaterials Science, Multidisciplinary
000046889 1001_ $$0P:(DE-Juel1)VDB2436$$aLi, Z.$$b0$$uFZJ
000046889 245__ $$aSupramolecular Nanostructures of 1,3,5-Benzene-tricarboxylic Acid at Electrified Au(111)/0.05 M H2SO4 Interfaces - An in-situ Scanning Tunneling Microscopy Study
000046889 260__ $$aWashington, DC$$bACS Publ.$$c2005
000046889 300__ $$a6915 - 6928
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000046889 440_0 $$04081$$aLangmuir$$v21$$x0743-7463
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000046889 520__ $$aThe potential-induced adsorption and self-assembly of 1,3,5-benzene-tricarboxylic acid (TMA) was investigated at the electrified Au(111)/0.05 M H2SO4 interface by in-situ scanning tunneling microscopy (STM) and surface enhanced infrared reflection absorption spectroscopy (SEIRAS) in combination with electrochemical techniques. Depending on the applied electric field, TMA forms five distinctly different, highly ordered supramolecular adlayers on Au(111) surfaces. We have elucidated their real-space structures at the molecular scale. In the potential range -0.25 V < E < 0.20 V, planar-oriented TMA molecules form a hexagonal open-ring honeycomb structure, Ia, a hydrogen-bonded ribbon-type phase, Ib, and a herringbone-type phase, Ic, stabilized by directional hydrogen bonding and weak substrate-adsorbate interactions. Interfacial water molecules are being replaced. In 0.20 V < or = E < 0.40 V, e.g., around the potential of zero charge, and at slightly higher coverages, a close-packed physisorbed adlayer of hydrogen-bonded TMA dimers, II, was observed. Further increase of the electrode potential to positive charge densities causes an orientation change from planar to upright. An initially disordered phase, IIIa, transforms into an ordered, stripelike chemisorbed adlayer, IIIb, of perpendicularly oriented TMA molecules. One carboxylate group per molecule is bound to the electrode surface, while the two other protonated carboxyl groups are directed toward the electrolyte and act as structure-determining components of a hydrogen-bonded two-dimensional ladder-type network. Structural transitions between the various types of ordered molecular adlayers are attributed to (hole) nucleation and growth processes.
000046889 536__ $$0G:(DE-Juel1)FUEK252$$2G:(DE-HGF)$$aMaterialien, Prozesse und Bauelemente für die  Mikro- und Nanoelektronik$$cI01$$x0
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000046889 7001_ $$0P:(DE-Juel1)VDB35518$$aHan, B.$$b1$$uFZJ
000046889 7001_ $$0P:(DE-HGF)0$$aWan, L. J.$$b2
000046889 7001_ $$0P:(DE-Juel1)VDB9859$$aWandlowski, Th.$$b3$$uFZJ
000046889 773__ $$0PERI:(DE-600)2005937-1$$a10.1021/la0507737$$gVol. 21, p. 6915 - 6928$$p6915 - 6928$$q21<6915 - 6928$$tLangmuir$$v21$$x0743-7463$$y2005
000046889 8567_ $$uhttp://hdl.handle.net/2128/2167$$uhttp://dx.doi.org/10.1021/la0507737
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000046889 9201_ $$0I:(DE-Juel1)VDB43$$d31.12.2006$$gISG$$kISG-3$$lInstitut für Grenzflächen und Vakuumtechnologien$$x0
000046889 9201_ $$0I:(DE-Juel1)VDB381$$d14.09.2008$$gCNI$$kCNI$$lCenter of Nanoelectronic Systems for Information Technology$$x1$$z381
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