korean english


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 2022학년도 1학기 콜로퀴움 일정 2022.01.10 26994
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 968459
225 <12/4> Shining light on the dark Universe 2013.11.29 76108
224 <4/10> Holographic Nucleons: In Search of a String Theoretical Solution to QCD 2009.04.06 76048
223 <9/5> Dark Matter and Dark Energy in Cosmology 2008.09.01 76016
222 <11/2>반도체성 나노구조 2007.11.01 75854
221 <11/17>의학에서의 치료음향 Therapeutic Sound in Medicine 2006.11.15 75486
220 <9/26> High Energy Physics as e-Science 2008.09.22 75292
219 <12/4> The "Physics" of Climate Change 2009.12.02 74994
218 <9/10> Low temperature graphene synthesis 2010.08.30 74809
217 <10/30> Nambu and the Standard Model 2009.10.27 74618
216 <11/10>한국원전중성미자실험(RENO) 2006.11.08 74599
215 <9/15> 2006.09.07 74559
214 2008학년도 1학기 콜로퀴움 일정 안내 2008.03.04 74423
213 <4/6> Introduction to Superconducting Quantum Electronics 2007.04.03 74265
212 <3/16> Introduction to Experimental Nuclear Astrophysics 2007.03.15 74080
211 콜로퀴움입니다. 2005.12.29 74060
210 <Nov. 30(Wed.) 4:30 PM> Chiral solitons for topological informatics 2016.11.23 73913
209 <11/21>Super B factory @ KEK 2008.11.19 73904
208 <4/17>고온초전도 2세대 선재 : 현황 및 전망 2009.05.06 73861
207 <5/16>모의실험을 이용한 물리학습 2008.05.13 73856
206 <5/15>강상관 전자계의 열전변환 응용 2009.05.08 73849