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미세유체칩 내 자기조립화된 나노입자로 이루어진 이온교환막을 이용한 역전기분해 에너지 발전
최은표(Eunpyo Choi),권길성(Kilsung Kwom),김대중(Daejoong Kim),박정열(Jungyul Park) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
This paper presents a novel microplatform for high power energy generation based on reverse electrodialysis. The ideal cation-selective membrane for power generations is realized using geometrically controlled in-situ self-assembled nanoparticles. Our proposed membranes can be constructed with simple and cost effective process using microdroplet control containing nanoparticles in microchannel. Another advantage in our system is that maximum powers and the energy conversion efficiency can be improved by changing the geometry of microchannel and proper selection of size and materials in nanoparticles. This proposed platform can be used to supply power sources to other microdevices and contribute a fundamental understanding of the ion transport behavior and the power generation mechanism.
미세유체칩 내 자기조립화된 나노입자로 이루어진 이온교환막을 이용한 역전기투석 에너지 발전
최은표(Eunpyo Choi),권길성(Kilsung Kwon),김대중(Daejoong Kim),박정열(Jungyul Park) 대한기계학회 2014 大韓機械學會論文集B Vol.38 No.5
본 논문은 미세유체 시스템에서 농도차에 의한 역전기투석을 이용하여 에너지발전을 할 수 있는 장치를 제안한다. 역전기투석을 위한 이온교환막은 미세유체칩의 적정 위치에 자기조립화된 나노입자 사이의 공극으로 이루어지며, 이는 마이크로 용량의 나노입자가 분산된 용액 방울을 제어함으로써 쉽고 저렴한 방법으로 제작이 가능하다. 본 제안 시스템은 미세유체칩의 형상을 변형하거나 나노입자의 사이즈, 혹은 나노입자의 종류를 손쉽게 바꿔가며 최대 파워와 에너지 변환 효율을 향상 시킬 수 있다는 장점이 있다. 앞으로, 본 연구에서 제안하는 디바이스는 랩온어칩 시스템에서 다른 미세장치로 에너지를 공급하는 매개체로 이용 될 수 있을 뿐 아니라 더 다양한 재료를 이용함으로써 이온 교환현상 및 에너지 발전의 기초 연구에 활용될 수 있을 것이라 기대한다. This paper presents a novel microplatform for high power generation based on reverse electrodialysis. The ideal cation-selective membrane for power generation was realized using geometrically controlled in situ self-assembled nanoparticles. Our proposed membranes can be constructed through a simple and cost-effective process that uses microdroplet control with nanoparticles in a microchannel. Another advantage of our system is that the maximum power and energy conversion efficiency can be improved by changing the geometry of the microchannel and proper selection of the nanoparticle size and material. This proposed platform can be used to supply power sources to other microdevices and contribute to a fundamental understanding of ion transport behavior and the power generation mechanism.
MEMS-Based Energy Harvesting System Using Self-Organized Heart Muscle Cells
Eunpyo Choi(최은표),Sung Q Lee(이성규),Tae Yun Kim(김태윤),Kyoung J. Lee(이경진),Jungyul Park(박정열) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
A novel hybrid MEMS-based energy harvesting system is developed using activation of heart muscle cell. Heart muscle cells from rats are cultured on the lead magnesium niobate-lead titanate(PMN-PT) single crystal diaphragm fabricated by MEMS technology. The mechanical stress induced by contraction forces from heart muscle cell is conversed into electrical power by piezoelectric effect. A PMN-PT materials exhibit extraordinary piezoelectric properties and are a kind of biocompatibility materials. This PMN-PT single crystal diaphragm has one-side interdigitated electrode design, which makes it possible that an external stress applied to the diaphragm results in output voltage by piezoelectric effect. After in vitro culture of heart muscle cell, we successfully measured the output signal of voltage from this hybrid MEMS power generator. This result shows the possibility that our power generator can be used as an alternative micropower source for the micro implantable systems or micro/nano-robots. Moreover, it can be applied to study a quantitative understanding of the mechanism of heart failure by measuring the contraction force from cardiomyocytes.