세미나 및 이벤트
Stabilizing and Driving MEMS/Microfluidic Devices with
세미나 날짜
2001-08-31
작성자
손문숙
작성일
2001-08-31
조회
942
1. 제 목 : Stabilizing and Driving MEMS/Microfluidic Devices with
Surface Tension
2. 연 사 : Professor Chang-Jin “CJ” Kim
Mechanical and Aerospace Engineering Department
University of California, Los Angeles (UCLA)
3. 일 시 : 2001년 6월 20일 (수) 17:00 – 18:00
4. 장 소 : 301동 1512호
5. 내 용 : The research in the Micromanufacturing Laboratory at UCLA is geared to:
1) advance understanding of physical phenomena in microscale, 2) advance
and broaden micromachining technologies, and 3) develop new micromechanical
devices. A typical research project has all three aspects above intertwined with each
other. Effort is made to conceive the design ideas on the most fundamental level, so
that the devices being designed not only use the miniaturization technologies of
MEMS but also utilize (or avoid) the unique physics of being in microscale.
Some of the projects that utilize surface tension as a useful force for MEMS will be
presented. Droplet ejection mechanism using bubble check valve, pumping with
sequential bubbles in microchannel, electrostatic switching of liquid-metal droplet
demonstrate how surface tension attenuates liquid movement so effectively in
microscale. Moving droplets or bubbles under thermal gradient or electric potential
gradient demonstrates that surface tension can even pump liquids. Three different
types of electrowetting mechanisms are introduced: continuous electrowetting
(CEW), electrowetting (EW), and electrowetting on dielectrics (EWOD). The
efficiencies of these microactuation methods are unprecedented. CEW boasts low
voltage (only 1-2 V), low power (only ~10 mW), and high speed (100 mm/s). A CEW-
based liquid micromotor is demonstrated. EWOD covers much wider choices of
liquid but with higher driving voltage. Manipulation of droplets with EWOD and its
applications will be presented.
6. 문 의 : 기계항공공학부 고 상 근 교수 (☏ 880-7115)
Surface Tension
2. 연 사 : Professor Chang-Jin “CJ” Kim
Mechanical and Aerospace Engineering Department
University of California, Los Angeles (UCLA)
3. 일 시 : 2001년 6월 20일 (수) 17:00 – 18:00
4. 장 소 : 301동 1512호
5. 내 용 : The research in the Micromanufacturing Laboratory at UCLA is geared to:
1) advance understanding of physical phenomena in microscale, 2) advance
and broaden micromachining technologies, and 3) develop new micromechanical
devices. A typical research project has all three aspects above intertwined with each
other. Effort is made to conceive the design ideas on the most fundamental level, so
that the devices being designed not only use the miniaturization technologies of
MEMS but also utilize (or avoid) the unique physics of being in microscale.
Some of the projects that utilize surface tension as a useful force for MEMS will be
presented. Droplet ejection mechanism using bubble check valve, pumping with
sequential bubbles in microchannel, electrostatic switching of liquid-metal droplet
demonstrate how surface tension attenuates liquid movement so effectively in
microscale. Moving droplets or bubbles under thermal gradient or electric potential
gradient demonstrates that surface tension can even pump liquids. Three different
types of electrowetting mechanisms are introduced: continuous electrowetting
(CEW), electrowetting (EW), and electrowetting on dielectrics (EWOD). The
efficiencies of these microactuation methods are unprecedented. CEW boasts low
voltage (only 1-2 V), low power (only ~10 mW), and high speed (100 mm/s). A CEW-
based liquid micromotor is demonstrated. EWOD covers much wider choices of
liquid but with higher driving voltage. Manipulation of droplets with EWOD and its
applications will be presented.
6. 문 의 : 기계항공공학부 고 상 근 교수 (☏ 880-7115)
