受生物启发的纳米管分级自组装成多维和多尺度结构。

Bio-inspired hierarchical self-assembly of nanotubes into multi-dimensional and multi-scale structures.

机构信息

School of Chemistry & Chemical Technology, State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200240, China.

出版信息

Nanoscale. 2012 Jan 7;4(1):224-30. doi: 10.1039/c1nr11151e. Epub 2011 Nov 10.

DOI:10.1039/c1nr11151e

PMID:22075963

Abstract

As inspired from nature's strategy to prepare collagen, herein we report a hierarchical solution self-assembly method to prepare multi-dimensional and multi-scale supra-structures from the building blocks of pristine titanate nanotubes (TNTs) around 10 nm. With the help of amylose, the nanotubes was continuously self-assembled into helically wrapped TNTs, highly aligned fibres, large bundles, 2D crystal facets and 3D core-shell hybrid crystals. The amyloses work as the glue molecules to drive and direct the hierarchical self-assembly process extending from microscopic to macroscopic scale. The whole self-assembly process as well as the self-assembly structures were carefully characterized by the combination methods of (1)H NMR, CD, Hr-SEM, AFM, Hr-TEM, SAED pattern and EDX measurements. A hierarchical self-assembly mechanism was also proposed.

摘要

受自然界制备胶原蛋白策略的启发，我们在此报告了一种分级溶液自组装方法，可从原始钛酸盐纳米管（TNTs）构建块中制备具有多维和多尺度的超结构，其直径约为 10nm。在直链淀粉的帮助下，纳米管连续自组装成螺旋包裹的 TNTs、高度取向的纤维、大束、二维晶体面和三维核壳混合晶体。直链淀粉作为胶黏分子，驱动和指导从微观到宏观尺度的分级自组装过程。通过（1）H NMR、CD、高分辨 SEM、AFM、高分辨 TEM、SAED 图案和 EDX 测量等组合方法，对整个自组装过程和自组装结构进行了仔细的表征。还提出了一种分级自组装机制。