Confinement-driven weakening of the rotator phase transitions in an alkane through a possible tricritical point

Langmuir

Volumn 26, Issue 23, 2010, Pages 18362-18368

  Vijay Kumar, M ^a   Krishna Prasad, S ^a   Shankar Rao, D S ^a  

^a CENTRE FOR NANO AND SOFT MATTER SCIENCES   (India)

Author keywords

[No Author keywords available]

Indexed keywords

ANOPORES; DIFFERENT LENGTH SCALE; FINITE SIZE EFFECT; LANDAU MODEL; LONG CHAIN ALKANE; MESOSCOPIC LENGTH SCALE; N-TETRACOSANE; POROUS MATRIXS; ROTATOR PHASIS; SECOND ORDER TRANSITION; TEMPERATURE RANGE; TRICRITICAL POINT; X RAY MEASUREMENTS;

PARAFFINS; ROTATION;

PHASE TRANSITIONS;

EID: 78650245730     PISSN: 07437463     EISSN: 15205827     Source Type: Journal    
DOI: 10.1021/la1037266     Document Type: Article

References (32)

1. Bergman, R.; Swenson, J. Nature 2000, 403, 283-286
2. Radhakrishnan, R.; Gubbins, K. E.; Sliwinska-Bartkowiak, M. Phys. Rev. Lett. 2002, 89, 076101-1-4
3. Binder, K. Ann. Rev. Mater. Res. 2008, 38, 123-142
4. Perron, J. K.; Kimball, M. O.; Mooney, K. P.; Gasparini, F. M. Nat. Phys. 2010, 6, 499-502
5. Kahn, A. M.; Ahlers, G. Phys. Rev. Lett. 1995, 74, 944-947
6. Singh, S. K.; Sinha, A.; Deo, G.; Singh, J. K. J. Phys. Chem. C 2009, 113, 7170-7180
7. Turner, W. R. Ind. Eng. Chem. Prod. Res. Dev. 1971, 10, 238-260
8. Gelb, L. D.; Gubbins, K. E.; Radhakrishnan, R.; Sliwinska-Bartkowiak, M. Rep. Prog. Phys. 1999, 62, 1573-1659
9. Craievich, A.; Doucet, J.; Denicolo, I. Phys. Rev. B 1985, 32, 4164-4168
10. Sirota, E. B.; King, H. E.; Singer, D. M.; Shao, H. H. J. Chem. Phys. 1993, 98, 5809-5824
11. Sirota, E. B.; Singer, D. M.; King, H. E. J. Chem. Phys. 1994, 100, 1542-1551
12. Sirota, E. B. Langmuir 1997, 13, 3849-3859
13. Sirota, E. B.; Singer, D. M. J. Chem. Phys. 1994, 101, 10873-10882
14. See, e.g., Pershan, P. S. Structure of Liquid Crystal Phases; World Scientific: Singapore, 1988.
15. Ryckaert, J.; McDonald, I. R.; Klein, M. L. Mol. Phys. 1989, 67, 957-979
16. Marbeuf, A.; Brown, R. J. Chem. Phys. 2006, 124, 054901-1-9
17. Wentzel, N.; Milner, S. T. J. Chem. Phys. 2010, 132, 044901-1-10
18. Zammit, U.; Marinelli, M.; Mercuri, F.; Paoloni, S. J. Phys. Chem B. 2010, 114, 8134-8139
19. Lehto, M.; Schweitz, J.; Thornell, G. J. Microelectromech. Syst. 2007, 16, 728-733
20. Henschel, A.; Hofmann, T.; Huber, P.; Knorr, K. Phys. Rev. E 2007, 75, 021607-1-9
21. Jiang, K.; Xie, B.; Fu, D.; Luo, F.; Liu, G.; Su, Y.; Wang, D. J. Phys. Chem. B 2010, 114, 1388-1392
22. Mukherjee, P. K. J. Phys. Chem. B 2010, 114, 5700-5703
23. Mukherjee, P. K.; Deutsch, M. Phys. Rev. B 1999, 60, 3154-3162
24. Lobo, C. V.; Krishna Prasad, S.; Shankar Rao, D. S. Phys. Rev. E 2004, 69, 051706-1-8
25. Krishna Prasad, S.; Sridevi, S.; Shankar Rao, D. S. J. Phys. Chem. B 2010, 114, 7474-7481
26. Huber, P.; Wallacher, D.; Albers, J.; Knorr, K. Europhys. Lett. 2004, 65, 351-357
27. There is nearly a 10% increase in the spacing (in the R2 phase) upon confinement. Such an increase is known in smectic systems and associated with a slight stretching of the alkyl chains caused by the larger surface interaction created by the higher surface to volume ratio of the membranes, See, e.g., refs 20 and 21.
28. Liu, H. Y.; Huang, C. C.; Bahr, Ch.; Heppke, G. Phys. Rev. Lett. 1988, 61, 345-348
29. Shashidhar, R.; Ratna, B. R.; Nair, G. G.; Krishna Prasad, S. Phys. Rev. Lett. 1988, 61, 547-549
30. A caveat regarding the R1-R5 transition is the following: While the tilt order parameter is the same, one difference between the smectic-A-smectic-C and R1-R5 transitions is that in the former case the layers are 2D liquids and the azimuthal direction is a locally continuous variable while in the latter there are only three inequivalent directions since the lattice already has crystalline order.
31. See, e.g., Chandrasekhar, S. Liquid Crystals; Cambridge University Press: Cambridge, 1992.
32. Ocko, B. M.; Wu, X. Z.; Sirota, E. B.; Sinha, S. K.; Gang, O.; Deutsch, M. Phys. Rev. E 1997, 55, 3164-3182