model s heksagonalno mre zo - Raziskave - Univerza v Ljubljani

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Za pomoc in stevilne nasvete pri nastajanju tega dela se zahvaljujem svojemu mentorju, Slobodanu Zumru. Veliko so k pricujocemu delu prispevali tudi Victor M. Pergamenshchik, Giovanni Barbero in Anca L. Alexe-Ionescu, ki sem jim prav tako hvalezen. Hvala gre tudi mojim domacim in vsem ostalim, ki so me vseskozi podpirali.
smer studija: Fizika trdne snovi Povzetek V delu obravnavamo molekularno ureditev v blizini povrsine nematskega tekocega kristala. Posebna pozornost je posvecena elasticnim deformacijam ob povrsini in pojavu sidranja. Za preucevanje teh pojavov smo uporabili preprost mikroskopski model s heksagonalno mrezo in zanj ocenili tudi jakost sidranja. Na koncu smo v model vkljucili se spreminjanje gostote in stopnje urejenosti nematikablizupovrsine, da bi s tem jakost sidranja priblizali eksperimentalnim vrednostim. Kljucne besede: nematski tekoci kristal, elasticnost, ograditev, sidranje, heksagonalna mreza, povrsina, spreminjanje gostote, spreminjanje parametra urejenosti PACS: 61.30.Cz, 61.30.Gd Abstract This thesis deals with molecular ordering in a thin slab of nematic liquid crystal. Surface phenomena { like subsurface deformations and anchoring { have been studied in detail with a simple microscopic hexagonal lattice model which has also been used to estimate the anchoring strength. Finally, the analysis has been extended to density and order parameter variations close to the conning surface in order to achieve a better agreement of the estimated anchoring strength with experimental results. Keywords: nematic liquid crystal, elasticity, connement, anchoring, hexagonal lattice, surface, density variation, scalar order parameter variation PACS: 61.30.Cz, 61.30.Gd
Page 1: Univerza v Ljubljani Fakulteta za m
Page 5 and 6: 1 Uvod Tekoci kristali so anizotrop
Page 7 and 8: 2 Elasticnost ograjenih nematikov 2
Page 9 and 10: Elasticnost ograjenih nematikov 9 p
Page 11 and 12: Elasticnost ograjenih nematikov 11
Page 13 and 14: 3 Model s heksagonalno mrezo 3.1 Pr
Page 15 and 16: Model s heksagonalno mrezo 15 Razda
Page 17 and 18: Model s heksagonalno mrezo 17 model
Page 19 and 20: Model s heksagonalno mrezo 19 geome
Page 21 and 22: Model s heksagonalno mrezo 21 q je
Page 23 and 24: Model s heksagonalno mrezo 23 Slika
Page 25 and 26: Model s heksagonalno mrezo 25 Slika
Page 27 and 28: Model s heksagonalno mrezo 27 varia
Page 29 and 30: Spreminjanje gostote in parametra u
Page 37 and 38: Sklep 37 nematika upostevali le ani
Page 39 and 40: Literatura 39 [26] H. Yokoyama, Phy
Page 41: Izjava Izjavljam, da sem v magistrs

model s heksagonalno mre zo - Raziskave - Univerza v Ljubljani

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