抗凝血生物材料研究 Ⅵ. 聚乙烯的表面肝素化

通过聚乙烯膜表面的臭氧活化及其随后与甲基丙烯酸环氧丙酯（ＧＭＡ）的接枝共聚、α，ω 二氨基聚氧乙烯（ＪｅｆａｍｉｎｅＥＤ ６００、ＥＤ ９００、ＥＤ ２００１）的亲核开环反应以及在碳二亚胺（ＥＤＣ）缩合剂存在下与肝素的缩合反应，可对聚乙烯膜表面进行高效的肝素共价固定化，其中ＪｅｆａｍｉｎｅＥＤ ６００所固定的肝素浓度可高达１３６μｇ／ｃｍ２，材料抗凝血性也最好     

一类含硅亚苯结构的新有机硅预聚体

一类含硅亚苯结构的新有机硅预聚体车波王安锋周彩华傅辛福林思聪（南京大学高分子科学与工程系生物材料分子工程和控制释放分子工程室南京２１００９３）关键词有机硅预聚体，对 硅亚苯硅氧烷，热稳定性，合成与表征，开环共聚从分子工程的角度看，以聚有机...     

An n—n type heterojunction enabling highly efficientcarrier separation in inorganic solar cells

Carrier separation in a solar cell usually relies on the p—n junction. Here we show that an n—n type inorganic semiconductor heterojunction is also able to separate the exciton for efficient solar cell applications. The n—n type heterojunction was formed by hydrothermal deposition of Sb₂(S,Se)₃ and thermal evaporation of Sb₂Se₃. We found that the n—n junction is able to enhance the carrier separation by the formation of an electric field, reduce the interfacial recombination and generate optimized band alignment. The device based on this n—n junction shows 2.89% net efficiency improvement to 7.75% when compared with the device consisted of semiconductor absorber—metal contact. The study in the n—n type solar cell is expected to bring about more versatile materials utility, new interfacial engineering strategy and fundamental findings in the photovoltaic energy conversion process.