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강준모(Junmo Kang),김형근(Hyeongkeun Kim),박영철(Young Chul Park),김주동(Joo Dong Kim),최성(Sung Choi),홍병희(Byung Hee Hong),김영진(Young-Jin Kim),최재붕(Jae-Boong Choi) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
We demonstrate the application of graphene coated heat pipe, showing high thermal transfer and corrosion resistant by water environment. The graphene coating layer was directly synthesized on both the inside and the outside of Cu pipe using chemical vapor deposition (CVD) method. The surface properties of Cu pipe exposed to water were investigated by optical and Raman spectroscopy. The heat transfer property of Cu pipe was tested by using hot water flows, showing improved heat transfer effect on the graphene coated heat pipe. This suggested that the graphene coated heat pipe would be very useful for the corrosion resistant coating and high thermal conductive material.
유전영동을 기반으로 하는 탄소 나노구조의 선택적인 분리
강준모(Junmo Kang),홍승현(Seunghyun Hong),최재붕(Jae-Boong Choi),김영진(Young-Jin Kim),백승현(Seunghyun Baik) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Dielectrophoretic behavior of semiconducting single-walled carbon nanotubes(SWNT) was investigated theoretically and experimentally. The surface conductance of nanotubes was modulated using anionic and cationic surfactant mixtures. The experimental results indicate that dielectrophoretic behavior of SWNT highly depends on the procedure of mixing two opposite-charged surfactants. Clausius-Mossotti factor was calculated by measuring zeta potentials and solution conductivity. Raman spectroscopy was used to characterize the dielectrophoretically deposited nanotubes arrary. We found that metallic nanotubes were selectively separated from the nanotubes suspension, resulting from modulation of surface conductance of semiconducting SWNT.