[기계전공대학원세미나] (11월 13일) Biomimetics in Bioengineering: Fractals in Nature and Human Technology

1. 제 목 : Biomimetics in Bioengineering:
Fractals in Nature and Human Technology

2. 일 시 : 2009년 11월 13일 (금) 16:30-17:30

3. 연 사 :
Dr. Marc Madou(UC Irvine)
Chancellor’s Professor UC Irvine
World Class University (WCU) Scholar UNIST

4. 장 소 : 301동 105호 강의실

5. 연사약력 :
Before joining UCI as the Chancellor’s Professor in Mechanical and Aerospace Engineering (MEA) , Dr. Madou was Vice President of Advanced Technology at Nanogen in San Diego, California. He specializes in the application of miniaturization technology to chemical and biological problems (BIO-MEMS). He is the author of several books in this burgeoning field he helped pioneer both in Academia and in Industry. He founded several micromachining companies and has been on the board of many more.

Many of his colleagues became well know in their own right in academia and through successful MEMS start-ups. Madou was the founder of the SRI International’s Microsensor Department, founder and President of Teknekron Sensor Development Corporation (TSDC), Visiting Miller Professor at UC Berkeley and Endowed Chair at the Ohio State University (Professor in Chemistry and Materials Science and Engineering). He has just started the third edition of “Fundamentals of Microfabrication,” an introduction to MEMS which has become known as the “bible” of micromachining.

Some of Dr. Madou’s recent research work involves artificial muscle for responsive drug delivery, a compact disc-based fluidic platform and a solid state pH electrode based on IrOx. To find out more about those recent research projects, visit www.biomems.net. At UCI, Dr. Madou works on carbon-MEMS, a CD based fluidic platform, solid state pH electrodes, artificial muscle for responsive drug delivery and integrating fluidics with DNA arrays as well as researching label-free assays for the Molecular Diagnostics platform of the future.

6. 내용요약 :
In biomimetics, one studies how nature, building atom by atom, i.e., through bottom-up manufacturing, through eons of evolution of life, developed materials, structures, processes and intelligence to inspire and improve the engineering and design of artificial materials, man-made structures and processes. Human manufacturing technology works in the opposite direction, i.e., it builds top-down; in most current manufacturing we tend to start with larger building blocks and use stiff materials (e.g., Si or stainless steel), whereas nature prefers small building blocks and mostly soft, low Young’s modulus materials (e.g., muscle or skin). Throughout history, biomimetics has been attempted but often with less-than-satisfactory results. Bird flight, for example, did not lead to aircraft, but mathematical expressions from aerodynamics did. As a consequence, from the middle of the eighteenth century to about 30 years ago, engineers were tempted to engineer around nature’s obstacles rather than be inspired by nature itself. Today though, in fields ranging from artificial intelligence to MEMS, NEMS and smart materials, the perceived advantages of bottom-up designs and manufacturing are convincing many scientists to research natural, biomimetic design, materials and manufacturing methods.
In this talk we will focus on the merit of using fractal designs in carbon for batteries, fuel cells and biosensors. Biomimetic fractal electrode designs are proposed for electrochemical devices such as miniature energy conversion devices and chemical sensors. A zeroth order approximation of fractal structure is analyzed and basic insights into the scaling laws of its electrical properties and surface to area ratio are derived. Fractal geometry is an optimal method of scaling electrochemical devices while minimizing internal resistance and maximizing surface to volume ratios. Recent advances in nanotechnology and Carbon-MEMS (C-MEMS) show great promise in facilitating the fabrication of fractal electrodes for electrochemical applications.

7. 문 의 : 기계항공공학부 전누리 교수(☏ 880-7111)