播种
肺表面活性物质
阳离子聚合
介孔材料
化学工程
介孔二氧化硅
材料科学
纳米纤维
溴化物
棒
硅酸盐
产量(工程)
纳米技术
化学
有机化学
高分子化学
复合材料
催化作用
工程类
替代医学
航空航天工程
病理
医学
作者
Longping Zhou,Guosong Hong,Limin Qi,Yunfeng Lu
出处
期刊:Langmuir
[American Chemical Society]
日期:2009-05-08
卷期号:25 (11): 6040-6044
被引量:37
摘要
Helical mesoporous silica nanofibers with parallel nanochannels were synthesized in high yield via a novel seeding-growth method by using the achiral cationic surfactant cetyltrimethylammonium bromide (CTAB) as template without auxiliary additives. A general entropy-driven model taking into account the icelike structure water due to the hydrophobic effect was proposed to explain the formation of helical mesoporous silica nanofibers. It was indicated that helical silica mesostructures could result from a thick layer of highly ordered icelike water around thin silicate seed rods with a proper concentration, which was verified by the effect of various anions and organic additives on the formation of helical mesoporous silica.
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