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タイトル: | Optimal Experimental Condition of IR pMAIRS Calibrated by Using an Optically Isotropic Thin Film Exhibiting the Berreman Effect |
著者: | Shioya, Nobutaka https://orcid.org/0000-0002-2915-894X (unconfirmed) Norimoto, Shingo Izumi, Naoki Hada, Miyako Shimoaka, Takafumi https://orcid.org/0000-0001-9131-9831 (unconfirmed) Hasegawa, Takeshi https://orcid.org/0000-0001-5574-9869 (unconfirmed) |
著者名の別形: | 下赤, 卓史 長谷川, 健 |
キーワード: | P-polarized multiple-angle incidence resolution spectrometry (MAIRS) Berreman effect TO-LO splitting/ standard sample/ molecular orientation |
発行日: | May-2017 |
出版者: | SAGE Publications |
誌名: | Applied Spectroscopy |
巻: | 71 |
号: | 5 |
開始ページ: | 901 |
終了ページ: | 910 |
抄録: | Infrared (IR) p-polarized multiple-angle incidence resolution spectrometry (pMAIRS) is a useful spectroscopic tool for revealing the molecular anisotropic structure in a thin film, which is used for the molecular orientation analysis of many functionalized organic thin films. Infrared pMAIRS provides both in-plane (IP) and out-of-plane (OP) vibrational mode spectra, which are influenced by the choice of the angles of incidence, i.e., angle set. To obtain quantitatively reliable pMAIRS spectra, therefore, the optimal angle set must be revealed. In a former study, an optimization study was carried out on a silicon substrate by using the band intensity ratio of the IP and OP spectra of highly oriented molecules in a thin film, which has a problem that the optimized results cannot be used for another substrate. In the present study, a totally new idea using an optically isotropic thin film as a standard sample is proposed to comprehensively explore the optimal angle set on various substrates: the band shift due to the Berreman effect of a strongly absorbing compound is used, instead of the band intensity. This new approach makes the pMAIRS calibration for various substrates a much easier task. With the optimal angle set, the molecular orientation angle in the film calculated by the pMAIRS spectra is also found to be reliable quantitatively. This technique opens a user-friendly way to a reliable molecular orientation analysis in an ultrathin film using IR pMAIRS. |
著作権等: | The final, definitive version of this paper has been published in 'Applied Spectroscopy, Vol. 71(5) 901-910' by SAGE Publications Ltd, All rights reserved. © The Authors. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/224993 |
DOI(出版社版): | 10.1177/0003702816658673 |
PubMed ID: | 27402686 |
出現コレクション: | 学術雑誌掲載論文等 |
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