Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/42009
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dc.contributor.authorJian, Z.Y.en_US
dc.contributor.author竇維平zh_TW
dc.contributor.authorChang, T.Y.en_US
dc.contributor.authorYang, Y.C.en_US
dc.contributor.authorDow, W.P.en_US
dc.contributor.authorYau, S.L.en_US
dc.contributor.authorLee, Y.L.en_US
dc.date2009zh_TW
dc.date.accessioned2014-06-06T08:06:05Z-
dc.date.available2014-06-06T08:06:05Z-
dc.identifier.issn0743-7463zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/42009-
dc.description.abstract3-Mereapto-1-propanesulfonic acid (MPS) and bis(3-sulfopropyl)disulfide (SPS) adsorbed on a Au(111) electrode were studied by using in situ scanning tunneling microscopy (STM). Although the adsorptions of MPS and SPS arc known to be oxidative and reductive, respectively, on an Au(111) electrode, these two admolecules behave similarly in terms of phase evolution, surface coverage, potential for stripping, and characteristics of cyclic voltammetry. However, different adsorption mechanisms of these molecules result in different structures. Raising electrode potential causes more MPS and SPS molecules to adsorb, yielding ordered adlattices between 0.67 and 0.8 V (vs reversible hydrogen electrode). The ordered adlattices of MPS and SPS appear as striped and netlike structures with molecules adsorbed parallel to the Au(111) surface. Switching potential to 0.9 V or more positive still does not result in upright molecular orientation, possibly inhibited by electrostatic interaction between the end group Of -SO(3)(-) and the Au(111) electrode. Lowering the potential to 0.4 V disrupted the ordered adlayer. Stripping voltammetric experiments show that MPS and SPS admolecules are desorbed from Au(111) at the same potential, suggesting that these molecules are both adsorbed via their sulfur headgroups. The S-S bond in SPS is likely broken upon its adsorption on Au(111).en_US
dc.language.isoen_USzh_TW
dc.relationLangmuiren_US
dc.relation.ispartofseriesLangmuir, Volume 25, Issue 1, Page(s) 179-184.en_US
dc.relation.urihttp://dx.doi.org/10.1021/la8029598en_US
dc.subjectself-assembled monolayersen_US
dc.subjectcopper electrodepositionen_US
dc.subjectgold surfacesen_US
dc.subjectadsorptionen_US
dc.subjectspectroscopyen_US
dc.subjectchlorideen_US
dc.subjectfilmsen_US
dc.subjectauen_US
dc.subjectalkanethiolsen_US
dc.subjectdecanethiolen_US
dc.title3-Mercapto-1-propanesulfonic acid and Bis(3-sulfopropyl) Disulfide Adsorbed on Au(111): In Situ Scanning Tunneling Microscopy and Electrochemical Studiesen_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1021/la8029598zh_TW
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