Self-assembly of uniform nanoporous silica fibers
Self-assembly of uniform nanoporous silica fibers
复制标题
均匀纳米多孔二氧化硅纤维的自组装
DOI：
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发表时间：
2005
影响因子：
2.4
通讯作者：
Igor M. Sokolov
中科院分区：
文献类型：
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作者：
Y. Kievsky;Igor M. Sokolov
纳米多孔二氧化硅形状的自组装对于现代纳米技术具有极大的兴趣，因为其具有均匀的孔径、简单性和低的生产成本。然而，有两个主要问题阻碍了自组装过程的广泛应用。首先，该过程带来了太广泛的各种组装的形状。其次，所需形状的产率远不是100%。在这里，我们描述了一种二氧化硅形状的酸性自组装过程，该过程不存在这两个问题。所描述的工艺实际上产生了100%非常均匀的纤维。每个纤维具有约2 μ m/s的六边形横截面和约5 μ m/s的长度。周期性为3.8 nm的高度均匀的孔沿纤维沿着是单向的。这些新纤维可用于色谱、药物输送、制造纳米线、用于“一维”化学的纳米反应器等。
Self-assembly of nanoporous silica shapes is of great interest for modern nanotechnology because of uniform pore size, simplicity, and low cost of production. However, there are two major problems that prevent broad use of the self-assembly process. First, the process brings too broad a variety of the assembled shapes. Secondly, the yield of the desired shapes is far from 100%. Here, we describe a process of acidic self-assembly of silica shapes that is free of both of these problems. The process described results in virtually a 100% of very uniform fibers. Each fiber has a hexagonal cross section of approximately 2 /spl mu/m and a length of approximately 5 /spl mu/m. The highly uniform pores with periodicity of 3.8 nm are unidirectional along the fiber. These new fibers can be used in chromatography, drug delivery, manufacturing nanowires, nanoreactors for "one-dimensional" chemistry, etc.