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Micropipette for Dispensing Sub-nanoliter Volume in Discrete Manner
이성준(Sungjun Lee),신재하(Jaeha Shin),김윤호(Yunho Kim),이정훈(Junghoon Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
We report a microdispenser that can meter and mix sub-nanoliter liquids in a discrete quantity. Our device is based on the structural stopping valve used in passive dispensers. A vent channel was proposed, designed for the autonomous pausing of a metered liquid segment and the seamless joining of the subsequent segments. While the previous microfluidic devices could meter only a single drop [2-4], lacking in mixing multiple segments, our approach enables the metering/mixing of different liquids in a discrete ratio. This module will find applications in bio-engineering and pharmaceutical research including large-scale cell differentiation experiment and drug discovery platforms.
50㎚ Thickness Gold Membrane Transducer
김형철(Hyungchul Kim),최준규(Junkyu Choi),김윤호(Yunho Kim),이성준(Sungjun Lee),신재하(Jaeha Shin),차미선(Misun Cha),이정훈(Junghoon Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
This work deals with ultra-thin metal-based nano-mechanical transducers that have potentials for extraordinary sensitivity. This nano membrane transducer (NMT) consists of a flat thin film of gold with 30-60 ㎚ thickness freely suspended over large square openings with the side dimensions of 50-500 ㎛. This work involves the fabrication process and the testing method to obtain pressure sensitivity.