Bioinspired Supramolecular Packing Enables High Thermo-Sustainability.

Angewandte Chemie
Kai TaoEhud Gazit

Abstract

Bottom-up self-assembled bioinspired materials have attracted increasing interest in a variety fields. The use of peptide supramolecular semiconductors for optoelectronic applications is especially intriguing. However, the characteristic thermal unsustainability limits their practical application. Here, we report the thermal sustainability of cyclo-ditryptophan assemblies up to 680 K. Non-covalent interactions underlie the stability mechanism, generating a low exciton-binding energy of only 0.29 eV and a high thermal-quenching-activation energy of up to 0.11 eV. The contributing forces comprise predominantly of aromatic interactions, followed by hydrogen bonding between peptide molecules, and, to a lesser extent, water-mediated associations. This thermal sustainability results in a temperature-dependent conductivity of the supramolecular semiconductors, showing 93 % reduction of the resistance from 320 K to 440 K. Our results establish thermo-sustainable peptide self-assembly for heat-sensitive applications.

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Nov 18, 2017·Science·Kai TaoEhud Gazit
Feb 2, 2019·Advanced Materials·Kai TaoEhud Gazit
Apr 12, 2019·Science Advances·Marie JakešováEric Daniel Głowacki
Nov 14, 2019·Materials Today·Kai TaoEhud Gazit
Jan 25, 2020·Energy & Environmental Science·Kai TaoEhud Gazit
Apr 8, 2020·Advanced Functional Materials·Kai TaoEhud Gazit

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Citations

Nov 10, 2020·Advances in Colloid and Interface Science·Jia KongZhimin He

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