2026-09-23T17:00:14Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/82752022-01-13T07:54:41Zcom_1721.1_7582com_1721.1_7581col_1721.1_131022
Robert J. Birgeneau.
Park, Sungil, 1967-
Massachusetts Institute of Technology. Dept. of Physics.
Massachusetts Institute of Technology. Department of Physics
2005-08-23T18:48:59Z
2005-08-23T18:48:59Z
2001
2001
http://hdl.handle.net/1721.1/8275
50407138
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2001.
Includes bibliographical references (p. 127-130).
Octylcyanobiphenyl (8CB) embedded in silica aerosil gels have been studied by means of high resolution X-ray scattering experiments. The silica particles form a hydrogen-bonded fractal gel network that introduces quenched disorder. As a result, the nematic to smectic-A transition is replaced by the growth of static short range smectic correlations. The X-ray scattering profile has two contributions: a thermal fluctuation term which resembles that of the pure liquid crystal and a static fluctuation term due to the random field that becomes important at low temperatures. The decrease of the smectic correlations with increasing silica density is consistent with theory and other experiments.
by Sungil Park.
Ph.D.
130 p.
7871755 bytes
7871513 bytes
application/pdf
application/pdf
eng
Massachusetts Institute of Technology
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http://dspace.mit.edu/handle/1721.1/7582
Physics.
Physics of liquid crystals embedded in silica gels
Thesis
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