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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 2. predavanje iz sklopa "Kolokviji na IJS" v letu 2016/17, ki bo <strong><span style='color:red'>v torek, 27. septembra 2016, 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><span lang=EN-US style='mso-fareast-language:ZH-CN'>prof. dr. Paul Muralt<o:p></o:p></span></b></p><p class=MsoNormal><i><span lang=EN-US style='mso-fareast-language:ZH-CN'>Ecole Polytechnique Fédérale de Lausanne, Lozana, Švica<o:p></o:p></span></i></p><p class=MsoNormal><b><span style='font-size:14.0pt'><o:p> </o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span lang=EN-US style='font-size:16.0pt'>Izbolj</span></b><b><span style='font-size:16.0pt'>š</span></b><b><span lang=EN-US style='font-size:16.0pt'>evanje učinkovitosti elektromehanskih tankih plasti<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='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'>Ob nastopu četrte industrijske revolucije je pred nami pretežno robotizirani svet. Analogne elektromehanske naprave, ki so nujne za omenjeno revolucijo, omogočajo dodatne funkcije zaznavanja, aktuacije, komunikacije in izdelave. Piezoelektrični pojav ima pomembno vlogo pri kateri koli elektromehanski pretvorbi, zaradi česar ga izkoriščamo na primer pri ultrazvočnem slikanju in mobilni telefoniji. Zaradi vse večjega pomena miniaturizacije elektronskih naprav potrebujemo piezoelektrične tanke plasti z izboljšanimi lastnostmi. V predavanju bomo najprej predstavili osnove elektromehanske sklopitve: elektrostrikcijo, piezoelektričnost in njeno povezavo s feroelektričnostjo. Predstavili bomo najpomembnejše tankoplastne piezoelektrične materiale, izzive in dosežke na področjih rasti, integracije in lastnosti. Medtem ko tanke plasti svinec-cirkonijevega titanata izkazujejo veliko piezoelektrično napetost, zaradi česar so primerne za mikroaktuatorje, so tanke plasti aluminijevega nitrida odlične za uporabo v GHz območju zaradi visokega faktorja kvalitete. Nedavno so pokazali, da imajo zlitine s skandijevim nitridom precej večji piezoelektrični koeficient. Izmerjene lastnosti AlScN bomo primerjali z modeliranjem ab initio. Predavanje bomo zaključili z napovedjo preostalih izzivov in možnosti uporabe. <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'>Predavanje bo v angleščini.<o:p></o:p></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><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><span style='font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:SL'><br clear=all style='page-break-before:always'></span><p class=MsoNormal><span style='color:black'>We invite you to the 2nd Institute colloquium in the academic year 2016/17. The colloquium will be held </span><b><span style='color:red'>on Tuesday September 27, 2016 at 1 PM</span></b><span style='color:red'> in <b>the main Institute lecture hall</b></span><span style='color:black'>, Jamova 39, Ljubljana. To read the abstract click </span><span style='color:#1F497D'><a href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>. </span><span style='color:black'>Past colloquia are posted on</span><span style='color:#1F497D'> <a href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'>********************************************<b><o:p></o:p></b></p><p class=MsoNormal><b><span lang=EN-US>prof. dr. Paul Muralt<o:p></o:p></span></b></p><p class=MsoNormal><i><span lang=EN-US>Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland<o:p></o:p></span></i></p><p class=MsoNormal><b><span style='font-size:16.0pt;mso-fareast-language:ZH-CN'><o:p> </o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span lang=EN-US style='font-size:16.0pt'>Pushing the performance of electro-mechanical thin films<o:p></o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>We are witnessing the advent of the 4<sup>th</sup> industrial revolution, and are heading towards a largely robotized world. A lot of analogue electro-mechanical devices for sensing, actuation, communication, and fabrication are necessary ingredients for such revolution. Piezoelectricity plays an important role in any electro-mechanical conversion, and is used for instance in ultrasonic imaging and mobile phone communication. The necessary drive for miniaturization will result in a strong demand for piezoelectric thin films with improved, optimized properties. The talk will first introduce basic phenomena of electro-mechanical coupling: electrostriction, piezoelectricity, and its relation to ferroelectricity. The most important thin film piezoelectric materials are presented. Challenges and achievements in growth, integration, and properties will be reviewed. Results on performance issues such as achievable piezoelectric stress, aging and imprint will be discussed for lead-zirconate-titanate (PZT) thin films. While these are good for microactuators, aluminum nitride is superior at GHz frequency applications because of its higher mechanical quality factor. A recent discovery shows that alloying with scandium nitride leads to much larger piezoelectric coefficients. Most recent results on AlScN properties will be compared with ab initio calculations. The talk will finish with an outlook on remaining challenges, and potential applications. <o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Cordially invited!<o:p></o:p></p><p class=MsoNormal>Vabimo vas na 1. predavanje iz sklopa "Kolokviji na IJS" v letu 2016/17, ki bo <b><span style='color:red'>v sredo, 14. septembra 2016, ob 13. uri </span></b><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><span lang=EN-US style='mso-fareast-language:ZH-CN'>prof. dr. Seok-Hyun Yun<o:p></o:p></span></b></p><p class=MsoNormal><i><span lang=EN-US style='mso-fareast-language:ZH-CN'>Univerza Harvard, Združene države Amerike<o:p></o:p></span></i></p><p class=MsoNormal><b><span style='font-size:14.0pt'><o:p> </o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span lang=EN-US style='font-size:16.0pt'>Biofotonika<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='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'><span lang=EN-US>Svetloba kot del elektromagnetnega spektra od daljnje modre do bližnje infrardeče svetlobe nudi vsestranske načine vizualizacije bioloških vzorcev, zaznavanja bolezni in lajšanja zdravstvenih težav. V predavanju bomo pregledali temeljne prednosti svetlobe in povzeli načela delovanja vključno s fototermičnim in fotokemičnim pojavom, pregledali uspešno klinično uporabo svetlobe in se dotaknili možnosti, ki jih nudijo nove tehnologije kot so celični laserji.<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'>Predavanje bo v angleščini.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><b><span style='font-family:"Calibri",sans-serif;color:red'>Lepo vabljeni!</span></b><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><span style='font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:SL'><br clear=all style='page-break-before:always'></span><p class=MsoNormal><span style='color:black'>We invite you to the 1st Institute colloquium in the academic year 2016/17. The colloquium will be held </span><b><span style='color:red'>on Wednesday September 14, 2016 at 1 PM</span></b><span style='color:red'> in <b>the main Institute lecture hall</b></span><span style='color:black'>, Jamova 39, Ljubljana. To read the abstract click </span><span style='color:#1F497D'><a href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>. </span><span style='color:black'>Past colloquia are posted on</span><span style='color:#1F497D'> <a href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'>********************************************<b><o:p></o:p></b></p><p class=MsoNormal><b><span lang=EN-US>prof. dr. Seok-Hyun Yun<o:p></o:p></span></b></p><p class=MsoNormal><i><span lang=EN-US>Harvard University, United States of America<o:p></o:p></span></i></p><p class=MsoNormal><b><span style='font-size:16.0pt;mso-fareast-language:ZH-CN'><o:p> </o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span lang=EN-US style='font-size:16.0pt'>Biophotonics<o:p></o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>Light, spanning the electromagnetic spectrum from far blue to near infrared, offers versatile approaches to visualize biological specimens, detect diseases and treat health problems. Here, we revisit the fundamental advantages of light and summarize the principles of operation including photothermal and photochemical effects, overview the successful clinical utilities of light, and discuss the promises of new technologies such as cell lasers. <o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Cordially invited!<o:p></o:p></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>