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Wonseok Kim(김원석),Sungmin Park(박성민),Kihong Kim(김기홍),Gun Yong Sung(성건용),Sung Jae Kim(김성재) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
This paper reported a rigorous experimental analysis of ion concentration distributions near a nanoporous membrane in a micro/nanofluidic platform. The distribution was highly polarized due to ion concentration polarization (ICP) phenomenon. While previous studies had reported most of co- and counter-ions were rejected from ICP layer, we showed that, for the first time, most of cations were transported through a cathodic side and anions were consumed by electrode reactions. From this complete picture, we discretionarily collected samples from (1) the brine stream for inkdesalter without the loss of ink molecules, (2) the purified stream for recycling a used dialysate, or (3) the buffer stream for collecting small cationic species.
펄스 레이저를 이용한 절연물 위 실리콘 박막의 결정화에 관한 투과전자현미경 연구
남기수,김진혁,이정용,성건용 대한금속재료학회(대한금속학회) 1994 대한금속·재료학회지 Vol.32 No.7
A transmission electron microscopy study of the pulsed laser beam crystallized silicon thin film, deposited on SiO₂ at 520℃ by low pressure chemical vapor deposition, has been carried out. It has been shown that the amorphous silicon thin film irradiated by a pulsed laser beam was crystallized by an explosive crystallization process. The resulting polycrystalline matrix contained crystals which had either a diamond cubic or a hexagonal crystal structure. In the interior of the grains which have a hexagonal crystal structure, dislocations, extrinsic type stacking faults, and intrinsic type stacking faults were observed, but the defect density was apparently decreased compared with that in the grains crystallized by a soild phase crystallization. It is thought that the hexagonal crystal structure and many defects were formed by high temperature gradients at the liquid/solid interfaces and the growth breakdown.