Comparative Study of Mixed Monolayers of a Calixarene with a Fatty Acid and a Non-Amphiphilic Nematic Liquid Crystal |
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| Authors: | F. Nannelli V. S. U. Fazio Y. Matsuzawa L. Komitov K. Ichimura |
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| Affiliation: | 1. Department of Microelectronics and Nanoscience , Liquid Crystal Physics, Chalmers University of Technology &2. G?teborg University , S-41296 , G?teborg, Sweden;3. Research Laboratory of Resources Utilization, Tokyo Institute of Technology , Nagatsuta, Midori-ku, Yokohama , 226-8303 , Japan |
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| Abstract: | Abstract Many nematic liquid crystals (NLCs) lack a polar headgroup and thus are not able to form stable monolayers at the air/water (a/w) interface. A way to obtain monomolecular films of these compounds is to incorporate them into host monolayers of amphiphilic molecules. We report a comparative investigation of mixed films of Calix[4]resorcinarene O-octacarboxymethylated (CRO) with the non-amphiphilic NLC MBBA and with the amphiphilic stearic acid (SA). The comparative study is useful for a better understanding of the characteristics of the CRO-MBBA mixed films. Surface-pressure and surface-potential measurements on the monolayers at a/w interface, as well as ellipsometric and spectroscopic measurements on transferred Langmuir-Blodgett (LB) films, confirm that MBBA is additively incorporated into CRO films. |
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| Keywords: | Langmuir-Blodgett monolayers amphiphilic compounds mixed monolayers incorporation |
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