| 研究概要 |
The original plan of this project was to study the self-assembly of DNA origami tiles on air-water interfaces using Langmuir-Blodgett technique. Through this research, we aimed to 1) construct DNA origami tiles into large superstructures which could be useful for practical applications, and 2) gain fundamental understanding on the self-assembly behavior of 2D nanomaterials on various interfaces. During the investigation, we changed the material of focus from DNA origami to graphene oxide (GO) nanosheets. This was because DNA origami tiles became easily deformed and aggregated when placed on water surfaces. In contrast, GO was very stable. Furthermore, GO has been an actively studied material, especially for energy related applications such as ultra-capacitors and battery electrode.
In FY2012, we developed a new method to assemble GO nanosheets on air-liquid and liquid-liquid interfaces by complexation with oppositely charged polyelectrolytes. This allowed the construction of nanosheets into various macroscopic structures such as films, fibers, and capsules. The result was published in ACS Nano.
During FY 2013, we discovered that by further adding diffusion of polyelectrolyte molecules to the previous system, it was possible to assembly GO nanosheets into porous foam-like structures. From this study, we were able to propose a novel assembly technique, which we named as “diffusion driven layer-by-layer assembly”. A manuscript based on this study was submitted to Nature Communication and is currently under revision.
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