Regularly assembled structures in a controlled manner lead notable excellent properties with great potentials in many fields, including nanotechnology and material science. Especially, biomolecular-based assemblies exhibit the better control due to their monodispersity, and are utilized in diverse material fields. Among various biomolecules, recent studies have demonstrated that filamentous M13 bacteriophages (M13 phages, Figure) act as components to construct bioinspired materials. Established surface modification of M13 phages through genetic engineering and synthetic chemical methods is useful for the construction. We have developed genetically engineered M13 phage-based soft materials with liquid crystalline properties. To widen the applicability of virus-based materials, the control of phage assemblies is an essential requirement. Herein, we demonstrate solid films composed of regularly assembled M13 phages with high thermal diffusivities.<br/>We prepared phage films with various assembled structures and their thermal diffusivities were measured by temperature wave analysis. The oriented structures of the phages in the films were characterized by the polarized optical microscopy and the atomic force microscopy. It was revealed that the thermal diffusivity of liquid crystalline films with oriented structures prepared by the flow-induced method was higher than that with the non-oriented structure. The correlation between the thermal diffusivity and the orientation suggests that phage-oriented structures were essential for the thermal diffusivity. The results indicated that thermophysical property of phage films could be controlled by their assembly.

Thermal conductive molecular hierarchical assemblies composed of filamentous viruses

2019 Fall National Meeting

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