MEMS Seminar: Thursday, December 18th, Guided Self-Assembly & Artificial Structural Colors for Smart Scalable Systems, 2-3pm CISX-101

Roozbeh Parsa rparsa at
Mon Dec 15 14:08:58 PST 2008

MEMS Seminar Announcement:

Thursday, December 18th, 2008
2:00 – 3:00 pm 

Guided Self-Assembly & Artificial Structural Colors for Smart Scalable Systems

Prof. Sunghoon Kwon
Seoul National University, Korea

There are two different fabrication methods for building complex micro devices: top-down and bottom-up. The top-down approach, based on conventional photolithography, has given us amazing CMOS manufacturing capabilities but it’s facing a fundamental limit in it's downward scalability. Recently, various bottom-up manufacturing technologies have gained notice for their ability to overcome limits of top-down manufacturing. Breakthroughs will result from marrying top-down technique such as lithography and bottom-up technique such as self-assembly.
Moving past the mundane introduction, what I really want to talk about is ‘Smart Scalable Systems’, a radical bottom-up point of view for building complex systems.  It seeks to construct a complex system by self-assembly of many simpler components, like a mosaic or a collage in art. Instead of building a system monolithically, it scalably assembles lots of small parts that are manufactured separately in large quantity to build up complex systems such as biosensors, energy sources, and displays. In this seminar optofluidic maskless lithography will be presented as a first step for smart particle generation. Secondly, various fluidic self-assembly technologies such as railed microfluidics will be discussed as a smart particle assembly method. Then I will give a road map of application examples such as encoded particle based scalable biosensors, LED chip packaging, scalable energy sources and scalable displays. Finally, I will end with an innovative method of artificially mimicking nature’s various structural colors as a first step to scalable display. By creatively combining OFML and magnetic self-assembly, we demonstrated full color printing of artificial structural color using a single material.

Sunghoon Kwon was born and raised in Seoul, Korea. He received his BS from Seoul National University in Electrical Engineering in 1998. Fascinated by MRI and CT, he decided to study biomedical engineering and got his MS in BME from SNU. His passion for sailing motivated him to move to the Bay area for his advanced degree. In 2004, he got his Ph.D in Bioengineering at UC Berkeley completing his thesis work on MEMS confocal microscopes with Professor Luke Lee. He then worked on various nanofabrication and nanoscience problems with Professor Jeff Bokor at the Molecular Foundry at Lawrence Berkeley National Laboratory. He also founded SPS Microsystems, a company working on commercialization of a MEMS projector for cell phone. In 2006 he arrived back to Korea and joined SNU EE as a faculty member. His research group, the Biophotonics and Nano Engineering Laboratory (BINEL), is now working on various topics such as guided self assembly, scalable biosensors, and artificial structural colors.
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