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||2021학년도 1학기 콜로퀴움 일정||2021.01.13||30848|
|공지||<12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생||2016.11.28||640159|
|441||<Oct.20(Tue) 16:00> Electromagnetic Response and Thermomagnetic Instabilities in Three-Dimensional Nanostructured Superconductors||2015.10.15||44086|
|440||<Oct.15(Thu) 16:30> Single-Molecule Approach to Homology Search & Strand Exchange in Homologous Recombination||2015.10.12||42661|
|439||<Oct. 14(Wed.) 4:30 PM> 국방과학기술과 물리학||2015.10.07||52438|
|438||<Oct. 20(Tue.) 2:00 PM> High-throughput Synthesis of Oxide Thin Films||2015.10.05||45416|
|437||<Oct. 7(Wed.) 4:30 PM> Observing Ultra High Energy Cosmic Rays with your Smartphone||2015.10.02||46545|
|436||학술세미나 개최 안내: Local Modes in Vibrational (and Rotational) Spectroscopy||2015.10.01||42249|
|435||<Sep. 30(Wed.) 4:30 PM>Local electronic structures of stacking grain boundary in bilayer graphene||2015.09.23||53237|
|»||<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||47552|
|433||<Sep. 18(Fri.) 4:00 PM> Special seminar||2015.09.16||43249|
|432||<Sep. 16(Wed.) 4:30 PM> Watching molecular targets in living bodies: the cutting edge in clinical medicine||2015.09.09||48272|
|431||<Sep. 9(Wed.) 4:30 PM> Electronic structures of strongly-correlated systems||2015.09.03||50155|
|430||<8/29(토)> 세미나 개최 안내||2015.09.01||44596|
|429||2015학년도 2학기 콜로퀴움 일정||2015.08.06||73321|
|428||<6/9(화)> 세미나 개최 안내||2015.06.09||43606|
|427||<6/10(수) 오후4:30분> Closing in on the Axion Dark Matter hypothesis||2015.06.03||46077|
|426||<6/2(화)> 세미나 개최 안내||2015.06.01||44639|
|425||<6/3(수) 오후4:30분> The Quest for Dark Matter: Discovering Its Nature Underground?||2015.05.28||45602|
|424||<5/26(화)> 세미나 개최 안내||2015.05.27||43382|
|423||<5/27(수) 오후4:30분>Controlling phases in epitaxial transition metal oxide thin films||2015.05.21||57947|
|422||<5/16(토)> 세미나 개최 안내||2015.05.18||123469|