DC Field | Value | Language |
---|---|---|
dc.contributor.author | Han, Sang Woo | ko |
dc.contributor.author | Seo, H | ko |
dc.contributor.author | Chung, YK | ko |
dc.contributor.author | Kim, K | ko |
dc.date.accessioned | 2013-03-02T20:35:58Z | - |
dc.date.available | 2013-03-02T20:35:58Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2000-11 | - |
dc.identifier.citation | LANGMUIR, v.16, no.24, pp.9493 - 9500 | - |
dc.identifier.issn | 0743-7463 | - |
dc.identifier.uri | http://hdl.handle.net/10203/75411 | - |
dc.description.abstract | Self-assembled monolayers (SAMs) of 1,1'-disubstituted ferrocene derivatives, i.e., 1,1'-bis(11-mercaptoundecyl)ferrocene (1) and 1-decyl-1'-(11-mercaptoundecyl)ferrocene (2), on a gold surface were prepared, and their structural and electrochemical properties were characterized by reflection-absorption infrared spectroscopy (RAIRS), ellipsometry, cyclic voltammetry (CV), and subtractively normalized interfacial Fourier transform infrared spectroscopy (SNIFTIRS), From the RAIR spectral features, both molecules, 1 and 2, were found to chemisorb on gold as thiolates after deprotonation. The peak positions of the methylene stretching modes indicated that the alkyl chains of 1 and 2 assume disordered structures on the gold surface. The thicknesses of the monolayers 1 and 2 on gold were determined by ellipsometry to be 2.27 +/- 0.10 and 2.30 +/- 0.10 nm, respectively. In the CV experiments, symmetric redox peaks were identified at; ca. 0.32 and 0.30 V versus saturated calomel electrode (SCE) for the SAMs of 1 and 2, respectively. The surface coverage values determined from the CV of 1 and 2 were 3.4 x 10(-10) and 3.2 x 10(-10) mol/cm(2), respectively. Both SAMs at full-coverage limits were stable in neutral (0.2 M NaClO4) as well as in acidic (0.2 M HClO4) medium, suggesting that hardly any decomposition of the ferricinium cation occurred for the SAMs prepared from disubstituted ferrocene derivatives. In particular, the SAMs of 1 were stable irrespective of the surface coverage, displaying the bonding capability of dithiols to gold; the submonolayer of 2 was slightly unstable in neutral medium. The SNIFTIR spectral data suggested that the alkyl chain of the two SAMs takes a more upright orientation when the ferrocene moiety is oxidized to a ferricinium cation. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Electrochemical and vibrational spectroscopic characterization of self-assembled monolayers of 1,1 -disubstituted ferrocene derivatives on gold | - |
dc.type | Article | - |
dc.identifier.wosid | 000165477900062 | - |
dc.identifier.scopusid | 2-s2.0-0034317170 | - |
dc.type.rims | ART | - |
dc.citation.volume | 16 | - |
dc.citation.issue | 24 | - |
dc.citation.beginningpage | 9493 | - |
dc.citation.endingpage | 9500 | - |
dc.citation.publicationname | LANGMUIR | - |
dc.identifier.doi | 10.1021/la000025b | - |
dc.contributor.localauthor | Han, Sang Woo | - |
dc.contributor.nonIdAuthor | Seo, H | - |
dc.contributor.nonIdAuthor | Chung, YK | - |
dc.contributor.nonIdAuthor | Kim, K | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | TRANSFORM INFRARED-SPECTROSCOPY | - |
dc.subject.keywordPlus | CHEMICALLY MODIFIED ELECTRODES | - |
dc.subject.keywordPlus | QUARTZ-CRYSTAL MICROBALANCE | - |
dc.subject.keywordPlus | ATOMIC-FORCE MICROSCOPY | - |
dc.subject.keywordPlus | SITU FT-IRRAS | - |
dc.subject.keywordPlus | ALKANETHIOLATE MONOLAYERS | - |
dc.subject.keywordPlus | PLATINUM-ELECTRODES | - |
dc.subject.keywordPlus | ORGANIC-SURFACES | - |
dc.subject.keywordPlus | THIOL MONOLAYERS | - |
dc.subject.keywordPlus | METAL-SURFACES | - |
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