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</o:shapelayout></xml><![endif]--></head><body lang=SL link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Vabimo vas na 17. predavanje iz sklopa "Kolokviji na IJS" v letu 2012/13, ki bo <strong><span style='color:red'>v sredo, 24. aprila 2013, ob 13. uri </span></strong><span style='color:red'>v Veliki predavalnici Instituta »Jožef Stefan«</span> na Jamovi cesti 39 v Ljubljani. Napovednik predavanja najdete tudi na naslovu <a href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>, posnetke preteklih predavanj<span style='color:blue'> </span>pa na <a href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>. <o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<o:p></o:p></p><p class=MsoNormal><b>prof. dr. Boštjan Zalar<o:p></o:p></b></p><p class=MsoNormal><i>Institut Jožef Stefan<o:p></o:p></i></p><p class=MsoNormal style='mso-margin-top-alt:auto;text-align:justify'><b><span style='font-size:14.0pt;mso-fareast-language:SL'><o:p> </o:p></span></b></p><p class=MsoNormal style='text-align:justify'><b><span style='font-size:14.0pt'>Tekočekristalni elastomeri: v iskanju »morphing« plastike<o:p></o:p></span></b></p><p class=MsoNormal style='text-align:justify'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='text-align:justify'>Tekočekristalni elastomeri (TKE) so binarne mehke snovi, sestavljene iz zamreženih polimernih verig in mezogenih molekul, pripetih na te verige. Sklopitev med entropično elastičnostjo polimernega podsistema in spontanim orientacijskim urejanjem mezogenih molekul privede do obrnljivega termomehanskega obnašanja, to je do spreminjanja oblike vzorca s temperaturo. Možnosti uporabe teh materialov v tehnologiji “lab-on-a-chip”, MEMS in NEMS naprav so nesporne. Žal pa je trenutno edini uporaben način za aktuacijo teh snovi s spreminjanjem temperature. Alternativni načini vzbujanja, npr. z UV obsevanjem v sistemih z azo-molekulami ali pa z urejanjem v zunanjih poljih (v mrežah s feroelekričnimi molekulami ali v kompozitih, ki vsebujejo feroelektrične ali feromagnetne delce), so še v zgodnji fazi razvoja. V predavanju bomo obravnavali tako osnovno fiziko in kuharske recepte za pripravo kot tudi najnovejše aplikacije TKE sistemov.<i><o:p></o:p></i></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'>Predavanje bo v slovenščini.<span style='mso-fareast-language:SL'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><strong><span style='font-family:"Calibri","sans-serif";color:red'>Lepo vabljeni!</span></strong><strong><span style='font-weight:normal'><o:p></o:p></span></strong></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div></body></html>