Synthesis of 1D Silica Nanostructures with Controllable Sizes Based on Short Anionic Peptide Self-Assembly

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• 作者：Shengjie Wang ; Qingwei Cai ; Mingxuan Du ; Junyi Xue ; Hai Xu
• 刊名：Journal of Physical Chemistry B
• 出版年：2015
• 出版时间：September 10, 2015
• 年：2015
• 卷：119
• 期：36
• 页码：12059-12065
• 全文大小：482K
• ISSN：1520-5207

文摘

Artificial synthesis of silica under benign conditions is usually achieved by using cationic organic matrices as templates while the anionic analogues have not received enough consideration, albeit they are also functioning in biosilica formation. In this work, we report the design and self-assembly of an anionic peptide amphiphile (I₃E) and the use of its self-assemblies as templates to synthesize 1D silica nanostructures with tunable sizes. We show that short I₃E readily formed long nanofibrils in aqueous solution via a hierarchical self-assembly process. By using APTES and TEOS as silica precursors, we found that the I₃E nanofibrils templated the production of silica nanotubes with a wide size distribution, in which the silica size regulation was achieved by tuning the interactions among the peptide template and silicon species. These results clearly illustrate a facile method for generating silica nanomaterials based on anionic matrices.