日本語フィールド
著者：Masato Tominaga, Noriaki Watanabe, Yuto Yatsugi題名：In situ Raman Spectroelectrochemical Study of Potential-Induced Molecular Encapsulation of β-carotene Inside Single-Walled Carbon Nanotubes発表情報： 巻: 800 ページ: 156-161キーワード：概要：The effect of the electrochemical potential of single-walled carbon nanotubes (SWCNTs) on the encapsulation behavior of β-carotene inside the SWCNT cavities was investigated by in situ Raman spectroelectrochemistry. Prior to Raman measurement, the electrochemical behavior of β-carotene at SWCNT electrodes was investigated. Weak adsorption of β-carotene was observed, whereas at glassy carbon (GC) and highly oriented pyrolytic graphite (HOPG) electrodes, β-carotene showed diffusion-controlled reactions and was not adsorbed. Furthermore, a negative potential shift of the oxidation reaction of β-carotene was observed at the SWCNT surface compared with that at other carbon materials such as GC and HOPG. To remove the ends of SWCNTs to allow encapsulation of β-carotene and minimize damage of the side wall of SWCNTs, we used finely controlled potential oxidation method. Results of the in situ Raman measurements indicated that encapsulation of β-carotene into the SWCNT cavity occurred most smoothly when a potential of 0.3 V (vs. Ag/Ag+) was applied to the SWCNTs. When the applied potential was more than 0.4 V, the encapsulated β-carotene could be oxidized and decomposed through formation of cation radical and dication forms of β-carotene, even though the β-carotene was encapsulated in the SWCNTs. Applied potentials of 0.2–−0.2 V did not result in smooth encapsulation compared with that at 0.3 V. Overall, we found that the encapsulation behavior of β-carotene in SWCNTs depended on the potential of the SWCNTs.抄録：英語フィールド
Author：Masato Tominaga, Noriaki Watanabe, Yuto YatsugiTitle：In situ Raman Spectroelectrochemical Study of Potential-Induced Molecular Encapsulation of β-carotene Inside Single-Walled Carbon NanotubesAnnouncement information: Vol: 800 Page: 156-161An abstract：The effect of the electrochemical potential of single-walled carbon nanotubes (SWCNTs) on the encapsulation behavior of β-carotene inside the SWCNT cavities was investigated by in situ Raman spectroelectrochemistry. Prior to Raman measurement, the electrochemical behavior of β-carotene at SWCNT electrodes was investigated. Weak adsorption of β-carotene was observed, whereas at glassy carbon (GC) and highly oriented pyrolytic graphite (HOPG) electrodes, β-carotene showed diffusion-controlled reactions and was not adsorbed. Furthermore, a negative potential shift of the oxidation reaction of β-carotene was observed at the SWCNT surface compared with that at other carbon materials such as GC and HOPG. To remove the ends of SWCNTs to allow encapsulation of β-carotene and minimize damage of the side wall of SWCNTs, we used finely controlled potential oxidation method. Results of the in situ Raman measurements indicated that encapsulation of β-carotene into the SWCNT cavity occurred most smoothly when a potential of 0.3 V (vs. Ag/Ag+) was applied to the SWCNTs. When the applied potential was more than 0.4 V, the encapsulated β-carotene could be oxidized and decomposed through formation of cation radical and dication forms of β-carotene, even though the β-carotene was encapsulated in the SWCNTs. Applied potentials of 0.2–−0.2 V did not result in smooth encapsulation compared with that at 0.3 V. Overall, we found that the encapsulation behavior of β-carotene in SWCNTs depended on the potential of the SWCNTs.