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High-Pressure Phase Transition in CTAB-Micellar Solutions: A Raman Spectroscopic Study |
| LIN Ao-Lei1;WANG Kai1;ZHAO Yu1;HAO Jian1;ZOU Bo1,2 |
| 1National Laboratory of Superhard Materials, Jilin University, Changchun 1300122Department of Materials Science and Engineering, Jilin University, Changchun 130012 |
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| Cite this article: |
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LIN Ao-Lei, WANG Kai, ZHAO Yu et al 2007 Chin. Phys. Lett. 24 3085-3087 |
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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 that
in the CTAB crystal.
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| Keywords:
07.35.+k
82.40.Fp
91.60.Gf
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Received: 27 June 2007
Published: 23 October 2007
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| PACS: |
07.35.+k
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(High-pressure apparatus; shock tubes; diamond anvil cells)
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82.40.Fp
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(Shock wave initiated reactions, high-pressure chemistry)
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91.60.Gf
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(High-pressure behavior)
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[1] Myers D 1999 Surfaces, Interfaces, and Colloids: Principlesand Applications 2nd edn (New York: Wiley)
[2] Ma Y M et al 2007 Chin. Phys. Lett. 24 1180
[3] Zhang W W et al 2002 Chin. Phys. Lett. 19 1666
[4] Hao A M et al 2006 Chin. Phys. Lett. 23 2917
[5] Winter R 2001 Curr. Opin. Colloid Interf. Sci. 6 303
[6] Hara K et al 1999 J. Photochem. Photobiol. A 124 159
[7] Baden N, Kajimoto O and Hara K 2002 J. Phys. Chem. B 106 8621
[8] Hara K, Baden N and Kajimoto O 2004 J. Phys.: Condens. Matter 16 S1207
[9] Wong P T T and Mantsch H H 1983 J. Chem. Phys. 78 7362
[10] Haramagatti C R et al 2006 Phys. Chem. Chem. Phys. 8994
[11] Brooks S H et al 1988 Anal. Chim. Acta 209 111
[12] Jayaraman A 1983 Rev. Mod. Phys. 55 65
[13] Mao H K, Xu J and Bell P M 1986 J. Geophys. Res. B 914673
[14] Kalyanasundaram K and Thomas J K 1976 J. Phys. Chem. 80 1462
[15] Gaber B P and Peticolas W L 1977 Biochim. Biophys. Acta 465 260
[16] Amorim da Costa A M, Geraldes C F G C and Teixeira-Dias J J C 1982 J. Colloid Interf. Sci. 86 254
[17] Larsson K and Rand R P 1973 Biochim. Biophys. Acta 326245 |
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