Home > 게시판 > 세미나
아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.
4시 20분부터 제1과학관 31214 e+강의실에서 다과를 준비하오니 많은 참석 부탁드립니다.
Title: Grain boundary effect in Metal : A journey of discovery from crystal to thin films without grain boundaries
Speaker: Prof. Se-Young Jeong ( Department of Cogno-mechatronics Engineering, Pusan National University )
Date & Time: Sep. 23 (Wed.) 2015, 4:30 PM
Place: Natural Science 1, Room No. 31214
Abstract: It is well known that the resistivity of a metal is governed by electron–phonon scattering at room temperature, and by electron-impurity scattering at low temperatures. However, questions remain regarding the quantitative grain-boundary (GB) effect on the resistivity at room temperature. Upon examination of metal single crystals, we determined the degree to which the resistivity of the metal could be reduced by the elimination of the GB effect. Moreover, the resistivity continued to decrease, finally reaching its minimum value with successive iterations of GB reduction. Our results indicated that this approach works not only in bulk single crystals but also in thin films.
Radio-frequency (RF) sputtering usually produces polycrystalline films with numerous GBs. However, we developed a new method to grow a thin metal film without GBs; the resulting film quality was comparable to that produced using molecular beam epitaxy (MBE). This proposed technique also enables the fabrication of micro/nano-mesh structures of Cu electrodes on polyimide substrates for flexible, transparent conducting electrode (TCE) fabrication via ultraviolet (UV)-lithography and wet over-etching techniques.
Copper may potentially provide an advantage over silver; however, many questions remain with regard to revealing its full potential. Single crystal study may resolve these questions and those related to new materials yet to be discovered. Thus, a great adventure opens up, as we continue to explore the world of single crystals.
|공지||<12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생||2016.11.28||1056534|
|681||2019학년도 2학기 콜로퀴움 일정||2019.07.17||424340|
|680||<12/3> Magnetic couplings, optical spectra, and spin-orbit exciton in 5d Mott insulator Sr2IrO4||2012.11.26||356832|
|679||<Mar.3(Wed.)>Scaling laws in Natural Language Processing||2021.02.25||314155|
|678||2017학년도 1학기 콜로퀴움 일정||2017.01.05||282453|
|677||<10/25> Wave properties of dipole-exchange spin waves in confined magnetic thin films||2006.10.25||263218|
|676||2020학년도 1학기 콜로퀴움 일정||2020.01.31||253120|
|675||<5/16> 물리학자가 바라 본 단백질: 왜, 어떻게 연구하는가?||2012.05.10||249441|
|674||<3/14>Adaptive Optics for the Human Eye and Ophthalmic Applications||2008.03.12||234260|
|673||<11/6> Graphene plasmon and Plasmonics||2013.10.31||232750|
|672||BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems||2011.10.28||229961|
|671||<8/30(Wed.)10:30>Technology convergence and applications of Large-Area Electronics, e-Textiles, bio-sensors and bio-electronics||2017.08.29||226792|
|670||<6/11> Advanced Physiological Optics and Its Ophthalmic Applications||2014.05.28||226375|
|669||<6/17> Oscillating Fuzzy Sphere and M5/anti M5 configurations in ABJM model||2009.06.16||224294|
|668||<12/21> Special Seminar by Professor Ilya Vekhter||2010.11.30||223036|
|667||<Jan.14(Thu.)>Oxygen sponge effects for epitaxial manganite thin film design||2021.01.11||212808|
|666||<5/16(토)> 세미나 개최 안내||2015.05.18||205402|
|665||<11/5(화)> 특별세미나 개최 안내||2013.11.01||198074|
|»||<Sep. 23(Wed.) 4:30 PM>Grain boundary effect in Metal : A journey of discovery from crystal to thin films without grain boundaries||2015.09.16||196605|
|663||<June.12(Wed.)> Ribocomputing: Cellular Logic Computation using RNA Devices||2019.06.07||195951|