由横向连接的纳米棒分层自组装形成的可切换螺旋结构。

Switchable helical structures formed by the hierarchical self-assembly of laterally tethered nanorods.

作者信息

Nguyen Trung Dac, Glotzer Sharon C

机构信息

Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.

出版信息

Small. 2009 Sep;5(18):2092-8. doi: 10.1002/smll.200900168.

DOI:10.1002/smll.200900168

PMID:19479922

Abstract

The formation of helical scrolls formed by self-assembly of tethered nanorod amphiphiles and their molecular analogs are investigated. A model bilayer sheet assembled by laterally tethered nanorods is simulated and shown that it can fold into distinct helical morphologies under different solvent conditions. The helices can reversibly transform from one morphology to another by dynamically changing the solvent condition. This model serves both to inspire the fabrication of laterally tethered nanorods for assembling helices at nanometer scales and as a proof-of-concept for engineering switchable nanomaterials via hierarchical self-assembly.

摘要

研究了由拴系纳米棒两亲物及其分子类似物自组装形成的螺旋卷轴的形成过程。模拟了由横向拴系纳米棒组装而成的模型双层片，并表明它在不同的溶剂条件下可以折叠成不同的螺旋形态。通过动态改变溶剂条件，螺旋可以从一种形态可逆地转变为另一种形态。该模型既有助于启发用于在纳米尺度上组装螺旋的横向拴系纳米棒的制造，也作为通过分级自组装工程化可切换纳米材料的概念验证。