logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.


4시 20분부터 제1과학관 31214 e+강의실에서 간단한 다과를 제공합니다.


아 래



Title: Single crystal growth of metal film and metal oxide film on different substrates and their various applications


Speaker: 정   세   영  교수님 (부산대학교)


Date & Time: May. 16. (Wed.) 2018 4:30 PM


Place: Natural Science 1,  Room No. 31214


Abstract: Copper thin films have been widely used as electrodes and interconnection wires in integrated electronic circuits, and more recently as substrates for the synthesis of graphene. However, many of the potential applications in the industries are limited by the serious oxidation and thus the deterioration of the conductivity. The ultra-high vacuum system required for high-quality Cu film fabrication, such as molecular beam epitaxy (MBE) and the limited size of the film cause the cost rise, which leads people to seek new materials. In this work, we demonstrate the growth and its mechanism of grain-free wafer-scale Cu thin films using a modified sputtering technique, not using MBE or ALD. Despite the low vacuum condition of 10-3 Pa, the resulting thin film was oxygen free. The Cu thin film is perfectly epitaxially grown on an Al2O3 (0001) substrate, but also shows high quality on polymer substrates such as PI, PC, PET and PDMS, which enables to apply to the region of flexible, stretchable and transparent devices. Moreover, the deposited film has much higher adhesion force than poly crystalline copper films. We applied the single crystal thin film to the flexible transparent conducting electrodes by making a micromesh/nanomesh structure using UV lithography and wet etching. The important advantage of the single crystal copper film is due to the natural oxide layer with a thickness of around 2nm, which protects further oxidation, so that the copper layer maintains clean even for 2-3 years without any capping layer. Another breakthrough application is the growth of Cu2O and CuO from the single crystal copper thin film, which are transparent and have p-type semiconducting property. Moreover, the color of the copper film can be controlled between transparent yellow and violet, between opaque gold and opaque metallic scarlet. In this presentation, I’d like to introduce also the growth of metal thin films such as copper and silver on various substrates such as sapphire, silicon and polymer and how we control oxidation of copper systematically.

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1079244
446 <10/13> 물리학과 저차원 스핀계 연구팀 초청 세미나 2006.10.11 92270
445 <2/15> Geometric distance-dependent percolations in networks on two-dimensional planes 2011.02.11 92171
444 <11/4 오후 3:30> Surface impurity induced self energy in bulk on a topological insulator 2013.10.23 91903
443 <Mar.27(Wed.)> Ultrafast Movie Maker for Photo-induced Dynamics: Ultrafast Electron Microscope 2019.03.20 91767
442 <2/11>Marginal Deformations For Lower Dimensional D-bran... 2008.02.05 91742
441 <9/19> Novel mechanical degree of freedom at nanoscales 2012.09.13 91559
440 <8/19(Mon) 13:30 ~ >Detection of cosmic rays in the PeV to EeV energy range file 2019.08.16 91305
439 <5/29> Study on the electronic interactions in solids under high magnetic fields 2013.05.23 91276
438 <4/2> Supersymmetric vacua of mass-deformed M2-brane theory 2010.03.29 91195
437 <Sep. 9(Wed.) 4:30 PM> Electronic structures of strongly-correlated systems 2015.09.03 91139
436 <6/10> Traffic Problem in Physics and Its Application 2008.06.10 91057
435 <5/7> Contribution of Internal and Surface Traps to Blinking Statistics in Colloidal Quantum Dots 2014.04.30 90914
434 <8/17> Is Quantum Criticality a Key to Unconventional Superconductivity? 2006.08.09 90724
433 <11/23> Hot/Dense QCD 2007.11.16 90719
432 <8/7> Scotch tape and spectroscopy: probing and manipulating the surface of a topological insulator 2012.07.27 90697
431 <3/21> 우주가속팽창의 원인 규명 2012.03.15 90534
430 <Oct.20(Tue) 10:00-12:00> Novel quantum transport in Weyl semimetals and double-Weyl semimetals 2015.10.23 90477
429 <5/3> APOLLO Program: Understanding Neutron-Rich Nuclei for r-Process Nucleosynthesis 2012.05.03 90340
428 <8/7> Scotch tape and spectroscopy: probing and manipulating the surface of a topological insulator 2012.07.27 90301
427 <2/16>Hamiltonian formalism 2011.02.11 90264