Strain-driven self-rolling of hybrid organic–inorganic microrolls: interfaces with self-assembled particles

2012年7月20日 NPG Asia Materials 4, e7 (2012) doi:10.1038/am.2012.40

ハイブリッド材料: 薄膜を巻く


Masahide Takahashi, Cristiana Figus, Luca Malfatti, Yomei Tokuda, Kazuyuki Yamamoto, Toshinobu Yoko, Takuya Kitanaga, Yasuaki Tokudome & Plinio Innocenzi

Hybrid materials: Thin film on a roll
Researchers from Japan and Italy have devised a one-step strategy to roll single-layer films into microtubes. Films of materials ranging from metals to semiconductors to polymers have previously been rolled up. They typically consist of two or more mismatched layers, so that the scrolling process relies on the strain between layers. The researchers have now prepared a self-rolling single-layer film by ‘sol–gel’ synthesis of a glycidoxy-organosilane derivative in basic conditions, spin-coating of the product obtained on a silica substrate and subsequent drying. The bottom part of the film formed, less condensed than its upper counterpart, takes up water preferentially. Simply dipping it in water creates a strain that is sufficient to provoke scrolling. Species such as molecules or particles can be trapped within the resulting microtubes, whose diameters are controlled by adjusting the processing conditions. This simple and convenient method may facilitate preparation of rolls for functional materials.


NPG Asia Materials ISSN 1884-4049(Print) ISSN 1884-4057(Online)