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MPNIM结构光致变电容效应
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作者 朱长纯 刘君华 j.m.xu 《Journal of Semiconductors》 EI CAS CSCD 北大核心 1989年第6期419-425,共7页
木文报告了作者之一首先发现的MPNIM(金属-P型半导体-N型半月比-绝缘体-金属)结构的光致变电容效应。基于该效应已研制出新器件:半导体双向光控变容器.新器件的电容值与入射光强的关系,光谱响应特性,频率特性,C-V特性,温度特性已被研究.
关键词 光致变电容 光敏元件 MPNIM 结构
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HIGHLY DISPERSED MULTI-WALLED CARBON NANOTUBES IN WATER/ETHANOL AND ITS APPLICATION FOR PVA COMPOSITE 被引量:1
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作者 X.Y.Tao j.m.xu +1 位作者 F.Liu G.L.Xu 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2005年第3期389-396,共8页
Two carboxylation processes were carried out to modify multi-walled carbon nanot ube bundles (m-MWNTs). The results showed that both of the m-MWNTs could be high ly dispersed in water with the concentration up to 25 a... Two carboxylation processes were carried out to modify multi-walled carbon nanot ube bundles (m-MWNTs). The results showed that both of the m-MWNTs could be high ly dispersed in water with the concentration up to 25 and 15mg/mL in ethanol wit hout obvious deposition or conglomeration over 6 months. FTIR, Raman, TGA and TE M characterizations of the m- MWNTs showed that hydroxyl and carboxyl groups hav e been attached with MWNTs, and that the nanotube structure was only damaged a l ittle after modification treatments in mixed acids over 24h. Above prepared nano tube suspensions in water were successfully used as a filler of thermoplastic PV A composite to enhance its electrical conductivity. The results showed that the addition of m-MWNTs greatly improved the conductivity and the threshold of mass fraction was about 5wt%. The results also proved that purification process was n ot needed because of high purity of the raw MWNTs prepared in our group. 展开更多
关键词 carbon nanotube polyvinylalcohol composite CONDUCTIVITY
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