| High-Pressure Phase Transition in CTAB-Micellar Solutions： A Raman Spectroscopic Study |
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| 引用本文： | 林奥雷,王凯,赵宇,郝健,邹勃.High-Pressure Phase Transition in CTAB-Micellar Solutions： A Raman Spectroscopic Study[J].中国物理快报,2007,24(11):3085-3087. |
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| 作者姓名： | 林奥雷 王凯 赵宇 郝健 邹勃 |
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| 作者单位： | [1]National Laboratory of Superhard Materials, Jilin University, Changchun 130012 [2]Department of Materials Science and Engineering, Jilin University, Changchun 130012 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 20673048 and 20773043, NCET-06-0313 PCSIRT （IRT0625）, the National Basic Research Programme of China under Grant No2005CB724400. |
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| 摘 要： | We use a diamond anvil cell for the first time to investigate the Raman spectra of an aqueous micellar solution of hexadecyltrimethylammonium bromide （CTAB） at pressures up to 3.85 GPa. The pressure-induced phase transition between the micellar and coagel phases is found to occur at 0.64 GPa and 60℃. This phase transition has a pressure hysteresis, and thus exhibits the first-order phase transition properties. Further experimental results show that although the structure of the coagel phase is similar to that of the CTAB crystal, the interchain distance is slightly larger in the coagel phase than that in the CTAB crystal.
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| 关 键 词： | 高压条件 相位转移 分光镜 光学 |
| 收稿时间： | 2007-06-27 |
High-Pressure Phase Transition in CTAB-Micellar Solutions: A Raman Spectroscopic Study |
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| LIN Ao-Lei,WANG Kai,ZHAO Yu,HAO Jian,ZOU Bo.High-Pressure Phase Transition in CTAB-Micellar Solutions: A Raman Spectroscopic Study[J].Chinese Physics Letters,2007,24(11):3085-3087. |
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| Authors: | LIN Ao-Lei WANG Kai ZHAO Yu HAO Jian ZOU Bo |
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| Affiliation: | National Laboratory of Superhard Materials, Jilin University, Changchun 130012Department of Materials Science and Engineering, Jilin University, Changchun 130012 |
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| Abstract: | We use a diamond anvil cell for the first time to investigate the Raman spectra of an aqueous micellar solution of hexadecyltrimethylammonium bromide (CTAB) at pressures up to 3.85GPa. The pressure-induced phase transition between the micellar and coagel phases is found to occur at 0.64GPa and 60°C. This phase transition has a pressure hysteresis, and thus exhibits the first-order phase transition properties. Further experimental results show that although the structure of the coagel phase is similar to that of the CTAB crystal, the interchain distance is slightly larger in the coagel phase than thatin the CTAB crystal. |
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| Keywords: | 07 35 +k 82 40 Fp 91 60 Gf |
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