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Projects / Programmes source: ARIS

Colloidal particles in 2D ferroelectric liquid crystalline films

Research activity

Code Science Field Subfield
1.02.00  Natural sciences and mathematics  Physics   

Code Science Field
P250  Natural sciences and mathematics  Condensed matter: structure, thermal and mechanical properties, crystallography, phase equilibria 
P260  Natural sciences and mathematics  Condensed matter: electronic structure, electrical, magnetic and optical properties, supraconductors, magnetic resonance, relaxation, spectroscopy 
Keywords
colloidal particles, smectic liquid crystals, free-standing films
Evaluation (rules)
source: COBISS
Researchers (5)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  21506  PhD Matej Bažec  Physics  Researcher  2005 - 2007  53 
2.  19165  PhD Marjetka Conradi  Physics  Researcher  2004 - 2007  158 
3.  09089  PhD Igor Muševič  Physics  Head  2004 - 2007  750 
4.  18142  PhD Andreja Šarlah  Physics  Researcher  2004 - 2007  95 
5.  07110  PhD Slobodan Žumer  Physics  Researcher  2004 - 2007  1,026 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  90,600 
2.  1554  University of Ljubljana, Faculty of Mathematics and Physics  Ljubljana  1627007  34,059 
Abstract
The research interest of the proposed project is in colloid-colloid interactions and stability of colloidal structures in 2D dispersions, formed by micro and nanoscale inclusions in two-dimensional ferroelectric liquid-crystalline films. We are interested in the effect of either surface-adsorbed or membrane-included colloidal particles on the liquid crystalline ordering. Depending on the size and surface properties of the particles, either increase or decrease of the nematic-like order is expected, as well as the distortion of the 2D nematic director field. We expect that new kind of structural forces are likely to be observed in such systems, which may significantly influence the colloidal stability. Due to 2D ferroelectricity, we expect important force contributions from the 2D elasticity, the 2D dipolar field, as well as strong influence of the 2D fluctuations of the nematic field, which is of Goldstone character. Of particular interest is here possible enhancement of the range of intercolloidal interactions due to the possible divergent dipolar field, resulting in long range Coulomb interaction. Several advanced experimental methods will be used, such as polarization microscopy with digital image capturing for tracking colloidal motion, spectrophotometry, static and quasielastic light scattering and ellipsometry. The experiments will be fully supported with theoretical analysis.
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