作者
Bidisha Tah, Prabir Pal, Mrityunjoy Mahato, GB Talapatra
发表日期
2011/7/7
期刊
The Journal of Physical Chemistry B
卷号
115
期号
26
页码范围
8493-8499
出版商
American Chemical Society
简介
Herein, we report the aggregation behavior of catanionic mixtures of the anionic surfactant sodium dodecyl sulfate (SDS) and the cationic surfactant cetyltrimethylammonium bromide (CTAB) in solution and at the air/water interface obtained by the Langmuir–Blodgett (LB) technique. We employed Fourier transform infrared spectroscopy, in situ phase-contrast inverted microscopy, scanning electron microscopy, and atomic force microscopy to characterize the systems in solution, at the air/water interface, and in LB films. We found spherical vesicles at the SDS/CTAB ratio of 35/65 in aqueous solution and an ordered aggregated morphology called surface micelles at SDS/CTAB ratios of 35/65 to 65/35 at the air/water interface. Other mixtures (SDS/CTAB = 90/10, 10/90) were found to contain mostly disordered aggregated microstructures. An in situ time-dependent study of surface micelle formation at the air/water …
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B Tah, P Pal, M Mahato, GB Talapatra - The Journal of Physical Chemistry B, 2011