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Emission Stability of Semiconductor Nanowires
SeGi Yu(유세기),Taewon Jeong(정태원),Sang Hyun Lee(이상현),Jungna Heo(허정나),Jeonghee Lee(이정희),Cheol Jin Lee(이철진),Jinyoung Kim(김진영),HyungSook Lee(이형숙),YoonPil Kuk(국윤필),J.M. Kim(김종민) 한국진공학회(ASCT) 2006 Applied Science and Convergence Technology Vol.15 No.5
열 화학기상법으로 만든 GaN와 GaP 나노와이어에서 전계 방출과, 산소와 아르곤 분위기에서 안정성에 대해 조사하였다. GaN 나노와이어의 경우 산소 분위기에서 전계 방출이 급격하게 줄었으나, GaP에서는 그렇지 않았다. 두 나노와이어 모두 아르곤 분위기에서는 큰 변화가 없었다. GaP 나노와이어의 외부에 존재하는 산화물 층이 전자 방출 안정성에 크게 기여한 것으로 생각된다. 나노와이어에서 방출된 전자의 에너지 분포를 통해 반도체 나노와이어는 탄소 나노튜브와 그 전계 방출 메카니즘이 다름을 유추할 수 있었다. Field emission of GaN and GaP nanowires, synthesized by thermal chemical vapor deposition, and their emission stabilities under oxygen and argon environments were investigated. The field emission current of GaN nanowires was seriously deteriorated under oxygen environment, while that of GaP was not. Both wires did not show any noticeable change under argon environment. The existence of oxide outer shell layers in the GaP nanowires was proposed to be a main reason for this emission stability behavior. Field emission energy distributions of electrons from these nanowires revealed that field emission mechanism of the semiconductor nanowires were different from that of carbon nanotubes.
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이연숙,이형숙 연세대학교 생활과학연구소 1997 生活科學論集 Vol.11 No.-
The purpose of this study was to analyze the characteristics of design guidelines for child-care space and present a systematic interior design guidelines to meet a developmentally appropriate child care. As an environmental affordance system, Murtha's user benefit criteria was employed to analyze the contents of the interior design guidelines in the 10 selected literatures about child-care space. The profile and trends of characteristics of these interior design guidelines were presented as a result of this content analysis. A set of comprehensive interior design guidelines which was systematically synthesized based on the Murtha's user benefit criteria was presented according to the specific spaces. The results of analysis showed that first, the general guidelines not the space-specific ones were popular. Second, the behavioral facilitation and physiological maintenance dimension, especially functional and support conformance sub-dimensions were emphasized, whereas seldom mentions appeared in relation to perceptual maintenance and social facilitation dimensions in the literatures.
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