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Adsorption States and Orientation of Self-Assembled Monolayers Studied by X-ray Absorption and Photoemission SpectroscopiesAdsorption States and Orientation of Self-Assembled Monolayers Studied by X-ray Absorption and Photoemission Spectroscopies

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dc.contributor.author노재근-
dc.date.accessioned2021-08-04T06:24:46Z-
dc.date.available2021-08-04T06:24:46Z-
dc.date.created2021-06-30-
dc.date.issued2004-01-05-
dc.identifier.urihttps://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/75339-
dc.description.abstractSelf-assembly is an easy and useful method for fabricating an ordered organic monolayer film on a metal. The studies of the adsorption states and film structures of self-assembled monolayers (SAMs) are of crucial importance for understanding the growth mechanism of the uniform organic monolayer on the metal electrode. In this study, we have examined the orientation and adsorption states of the SAMs adsorbed on a Au(111) surface by near-edge soft X-ray absorption fine structure (NEXAFS) spectroscopy and X-ray photoemission spectroscopy (XPS). Adsorption states of the S atoms in the SAMs were examined by S2p XPS experiments. From the polarization dependence of the C K-edge NEXAFS spectra of SAMs, the averaged tilt angle of the molecular main axis could be determined. The several alkanethiol SAMs with the functional groups such as carboxyl group or benzene ring were measured to determine the molecular orientation on the Au(111) surface. The interaction of the hydrocarbon moiety in the S-containing cyclic organic molecules with the Au surface could be examined by the NEXAFS spectra. It is found that ?-electrons in thiophene have strong interaction with the Au surface, while the electronic structure of the hydrocarbon moiety in benzenethiol, cyclohexanethiol, and thiolane did not change by adsorption on Au(111). These results suggest that the strength of the interaction of the hydrocarbon moiety with the Au surface would be different in the SAM due to the small difference of the molecular shape and the electronic structure. Recently, we introduced a new angle-resolved XPS system in the Nanoscience Joint Laboratory of RIKEN. A preliminary experimental result of the COOH-terminated alkanethiol SAMs will be shown in the presentation. In NEXAFS studies, we have collaborated with Prof. K. Seki, Prof. Y. Ouchi, and Dr. K. Kanai of Nagoya University. NEXAFS measurements were carried out in the Photo Factory of the High Energy Accelerator Research Organization in Tsukuba.-
dc.publisherHanyang University, RIKEN-
dc.titleAdsorption States and Orientation of Self-Assembled Monolayers Studied by X-ray Absorption and Photoemission SpectroscopiesAdsorption States and Orientation of Self-Assembled Monolayers Studied by X-ray Absorption and Photoemission Spectroscopies-
dc.typeConference-
dc.contributor.affiliatedAuthor노재근-
dc.identifier.bibliographicCitationThe 2nd Hanyang University-RIKEN Workshop: Recent Progress in Nano-scale Fabrication-
dc.relation.isPartOfThe 2nd Hanyang University-RIKEN Workshop: Recent Progress in Nano-scale Fabrication-
dc.citation.titleThe 2nd Hanyang University-RIKEN Workshop: Recent Progress in Nano-scale Fabrication-
dc.citation.conferencePlaceJeju-do, Koea-
dc.type.rimsCONF-
dc.description.journalClass1-
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