X-ray diffraction and optical studies of Langmuir-Blodgett films formed from azobenzene derivatives |
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| Affiliation: | 1. Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan;2. Canon Machinery Inc., 85, Minami Yamada-cho, Kusatsu, Shiga 525-8511, Japan;3. Department of Electrical and Materials Science, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan;1. The University of Queensland, School of Dentistry, Herston, QLD 4006, Australia;2. Istanbul University, Faculty of Dentistry, Department of Periodontology, Istanbul 34116, Turkey;1. Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;2. BIOMATCELL, VINN Excellence Center of Biomaterials and Cell Therapy, Gothenburg, Sweden;3. Chemistry, Materials and Surfaces, SP Technical Research Institute of Sweden, Borås, Sweden;4. Department of Oral and Maxillofacial Surgery, Sahlgrenska Academy, University of Gothenburg, Sweden;1. Department of Applied Physics, University of Extremadura, Avda de Elvas s/n, 06006 Badajoz, Spain;2. Department of Biomedical Sciences, University of Extremadura, Avda de Elvas s/n, 06006 Badajoz, Spain;3. Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), University of Extremadura, Avda de Elvas s/n, 06006 Badajoz, Spain |
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| Abstract: | X-ray diffraction data were used to construct the electron density profiles of Langmuir-Blodgett films formed from two azobenzene derivatives, before and after annealing at moderate temperatures. The annealing process caused phase changes to occur that were apparent in the changes in optically observed textures and X-ray diffraction patterns. Consideration of these changes led us to conclude that, before annealing, the Langmuir-Blodgett films possessed smectic liquid crystal A phases and, after annealing, one compound had a tilted, layered crystal phase and the other a tilted liquid crystal phase. |
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