Mesoporous Silica Coating on Carbon Nanotubes: Layer-by-Layer Method

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• 作者：Xiaoyong Deng ; Ping Qin ; Man Luo ; Erlei Shao ; Hui Zhao ; Xing Yang ; Yanwen Wang ; Haifa Shen ; Zheng Jiao ; Minghong Wu
• 刊名：Langmuir
• 出版年：2013
• 出版时间：June 11, 2013
• 年：2013
• 卷：29
• 期：23
• 页码：6815-6822
• 全文大小：518K
• 年卷期：v.29,no.23(June 11, 2013)
• ISSN：1520-5827

文摘

It is of great interest to develop a simple, general, and easy-handling procedure for mesoporous silica coating. A facile, single-step method to coat iron oxide nanoparticles has been reported by Hyeon鈥檚 group. However, up to present, this method only successfully applied to those zero-dimensional nanostructures heavily capped by cetyltrimethyl ammonium bromide (CTAB); no others are reported. It is unknown how this simple method is feasible in coating those nanostructures not capped by CTAB. Herein, using carbon nanotubes (CNTs) as the model, through an analogous layer-by-layer assembly method, many more CTAB molecules were found to anchor to CNTs, on which uniform mesoporous silica shells can successfully be formed by Hyeon鈥檚 coating method. We believe that this contribution will pave the way for advancing the single-step method to become a general protocol in the mesoporous silica coating field.