20.500.12556/DKUM-38022 Temperaturno induciran fazni prehod nematičnega tekočega kristala Temperature induced phase transition of nematic liquid crystals V diplomskem seminarju obravnavamo dogajanje ob temperaturno induciranem faznem prehodu tekočega kristala med nematično ter izotropno fazo. V ta namen smo sintetizirali tekoči kristal MBBA ter z invertnim polarizacijskim mikroskopom opazovali dogajanje ob faznem prehodu. Vzorec smo izpostavili hitri ter počasni temperaturni spremembi ter opazovali fazni prehod ter rast domenskih struktur pri prehodu. Pri hitri podhladitvi smo izmerili korelacijske dolžine domenskih struktur ter hitrost naraščanja le-teh. Dogajanje ob prehodu smo opisali z Landau – de Gennesovim fenomenološkim modelom. In this thesis we study the Isotropic – Nematic phase transition. For this purpose we have synthesized the liquid crystal MBBA. The phase transition in the MBBA cell was observed under a polarizing microscope. We have studied the development of the domain pattern at the Isotropic – Nematic phase transition in the case of slow and fast continuous temperature reduction. In the case of a fast temperature reduction we measured the correlation length of the domain patterns and their expansion speed. The phase transition is described by the Landau – de Gennes phenomenological model. tekoči kristal nematik I – ¬N fazni prehod Landau – de Gennesov fenomenološki model nenadno spreminjanje temperature ob faznem prehodu rast domenskih struktur meritve korelacijske dolžine. liquid crystal nematic I – N phase transition Landau – de Gennes phenomenological model domain pattern growth measurement of the correlation length. true true false [J. Jagodič] Slovenski jezik Angleški jezik Delo diplomskega seminarja/zaključno seminarsko delo/naloga 2012-09-15 09:42:38 2012-09-27 14:01:29 2022-04-25 23:06:49 2021-04-19 03:21:25 2012 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 53(043.2) 19348744 URN:SI:UM:DK:XJHFL58K UNI_Jagodic_Uros_2012.pdf UNI_Jagodic_Uros_2012.pdf 1 C90F167D2F172212A1EFBB4B44FF228D 24a3f3fb1d40cafeab90b032df42e005ea316519c422fa9088c03475a5cd2121 64eed03b-7c08-11eb-bb7a-00155d0001ca 20.500.12556/dkum/8109379d-daba-402d-8241-1c305df01600 https://dk.um.si/Dokument.php?lang=slv&id=50580 Fakulteta za naravoslovje in matematiko 0 0 0