logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

4시 20분부터 제1과학관 31214 e+강의실에서 다과를 준비하오니 많은 참석 부탁드립니다.


아 래


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.

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1090726
36 <April 7(Wed.)> Mid-scale facilities for condensed matter research: high magnetic field and neutron scattering 2021.03.31 155175
35 <10/8>"Einstein was wrong?"--Two-proton spin- correlation measurement for EPR paradox. 2010.10.04 157417
34 <10/27> 'Brain dynamics underlying human decision-making' 2006.10.21 157651
33 <11/27> Energy Amplifier Systems:Simulation and Experiments in the Field 2009.11.23 158690
32 <5/22> Computer-based Mathematical Analysis and Applications to Physics (컴퓨터 기반 수리해석과 물리학에의 응용) 2013.05.15 162203
31 <Dec.5(Wed.)> 두 펄사 이야기 2018.11.28 162787
30 <5/22> Semiconductor Nanomaterials for Unusual Format Electronics 2009.05.18 164257
29 <4/18> 삼중항 여기자를 이용한 유기광전소자 연구 2012.04.05 166940
28 <9/25> 청각의 물리학: 어떻게 노이즈를 극복하는가? 2013.09.16 167683
27 <11/2> Color Science for Reflective mode Optical Shutter 2011.10.27 168024
26 2020학년도 2학기 콜로퀴움 일정 2020.07.16 169177
25 <5/23> 나노구조 산화물 재료의 기능성-용매화전자에서 전자화합물까지... 2012.05.17 174347
24 <11/13> Manmade Elements 2009.11.10 175440
23 <11/7> On-Film Formation of Bi Nanowires with Extraordinary Electron Mobility 2008.11.03 177210
22 <12/5> Fluerenes with diversed structures and their applications 2008.12.02 177235
21 <9/19> Downscaling of self-aligned, all-printed polymer thin-film transistors 2008.09.16 179346
20 <4/2> Radio Detection of Ultra High Energy Cosmic Rays and Neutrinos in Antarctica 2014.03.26 185322
19 <12/4> Shining light on the dark Universe 2013.11.29 185692
18 <Nov. 18(Wed.) 4:30 PM> Single-molecule chemistry and spectroscopy on ultrathin insulating films 2015.11.11 188450
17 <3/13> Probing hidden magnetism and quantum criticality in unconventional superconductors 2009.03.06 195675