건국대 - 세종대 화학과
제 253 회 합동 세미나
◆ 일시 : 2007 년 9 월 13 일(목) 오후 5 시
◆ 장소 : 건국대학교 과학관 201 호
◆ 연사 : 김일두 박사
(한국과학기술연구원)
Multi-dimensional Integration of Nano Materials and Electronics,
Application towards: Sensor, Energy, and Flexible Electronics
Recently, much interest has been paid to the development of nano-structured materials
and devices designed to achieve increased surface-to-volume ratios and reduced cross
sections, thereby offering more effective modulation of the device performance. In this
study, we propose a novel processing strategy to produce multi-dimensional
nanostructures for the development of novel integrated electronics, i.e., ultrasensitive gas
sensors, high performance energy systems and flexible electronics. We developed quasiordered 2D nano-structure using colloidal template techniques combined with physical
and chemical vapor deposition offering flexible dimensional control, i.e., control of the
diameters, heights, wall thickness etc.[1,2] The ability to control the macroporous
structure of such films on different length scales from some tens of nanometers up to
several microns also enables systematic investigation of microstructure-property
correlations in different classes of materials.[2,3] In addition, New solution chemistries
and modified electrospinning techniquesfor the development of 1D nanowires and 3D
networks of nanowires will be discussed in this work, in particular, for applications in
chemical sensors[4] and energy systems.
[1] I. D. Kim, A. Rothschild, Byong-Hong Lee, Dong-Young Kim, Seong-Mu Jo, and Harry L. Tuller,"Ultra-sensitive
chemiresistors based on electrospun TiO2 nanofibers", Nano Lett. 6 (2006) 2009-2013.
[2] I. D. Kim, A. Rothschild, D. J. Yang, and H. L. Tuller, "Macroporous TiO2 thin film gas sensors obtained using colloidal
templates" Sens. Actuators B (In press, 2007).
[3] S. Y. Chung, I. D. Kim, and S. J. L. Kang, "Strong Nonlinear Current-Voltage Behavior in Perovskite-Derivative Titanate"
Nature Materials, 3 (2004) 774-778.
[4] I. D. Kim, A. Rothschild, T. Hyodo, and H. L. Tuller, "Microsphere Templating as Means of Enhancing Surface Activity and
Gas Sensitivity of CaCu3Ti4O12 Thin Films" Nano Lett. 6 (2006)193-198.
김일두 박사님 약력
2000. 10 - 2001. 1 Visiting Researcher, INM (Institute for New Materials), Germany
2002. Ph.D. in Department of Materials Science and Engineering, KAIST
2003. 3 - 2005. 4 Postdoc, Dept. of Mat. Sci. & Eng., MIT
2005. 6 ~
Senior Research Scientist, Center for Energy Materials Research, KIST