아래와 같이 세미나가 진행될 예정이오니 학생들의 많은 참여 부탁드립니다.

1. 제 목 : Micro/Nanomanufacturing for Small Scale Characterization of Thermal Systems

2. 연 사 : Professor Tae-Youl Choi
      Department of Mechanical and Energy Engineering, University of North Texas

3. 일 시 : 2011년 7월 5일(화) 오전 11:00

4. 장 소 : 301동 1512-2호

5. 내 용: Small scale engineering, as will be presented in this talk, provides not only a characterization methodology at micro/nanoscale but also excellent opportunities to build useful devices such as micro and nanoelectronics components and ultra-sensitive sensors. I would like to introduce a few approaches in small scale characterization of thermal systems, e.g., one-dimensional and two-dimensional nanostructures, and nanofluids. The first approach is related to nanomanufacturing of a measurement platform to characterize thermoelectric properties of one-dimensional nanosystems such as carbon nanotubes and nanowires. This approach focuses on in situ measurements of thermal and electrical conductivity and Seebeck coefficient in one single measurement platform. To this end, a microfabricated device which is subsequently tailored by focused ion beam (FIB) is used to place a single nanowire across the designated metal electrodes. Nanomanufacturing by FIB was implemented to provide a platform for nanoscale measurement. In the second approach, we have demonstrated a novel technology to obtain few-layers of graphene through a mechanical exfoliation method. The technology originally developed inside the vacuum chamber (in Dual FIB) is currently being developed in an open-air environment, which shows a great potential in top-down scalable nanomanufacturing of high-quality graphene. Lastly, a microsensing technology has been adopted to characterize 2-dimensional nanostructures (e.g., carbon nanotube films) and carbon nanotube nanofluids. This technology will further be applicable to other nanostystems and microsystems including nuclear reactor materials and biological systems, as will be introduced as future research topics.

6. 약 력 : Dr. Choi is an assistant professor of Mechanical and Energy Engineering Department at the University of North Texas. He has earned his BS and MS from Seoul National University. And he is awarded PhD from University of California, Berkeley in 2002. He was a lecturer at the Department of Mechanical and Process Engineering at ETH Zurich, Switzerland before he joined UNT in 2006.

7. 문 의 : 기계항공공학부 이준식 교수 (☏880-7123 )