Long-Range Proton Transport in Films from a Reflectin-Derived Polypeptide
Chengyi Xu1, Nabin Kandel2, Xin Qiao2
1Department of Materials Science and Engineering, University of California, Irvine, Irvine, California 92697, United States.
ACS Applied Materials & Interfaces
|May 3, 2021
Summary
Researchers developed reflectin-derived polypeptide films that achieve long-range proton transport, a rare feat for bioelectronic materials. These films show conductivity and structural properties relevant for future bioinspired proton conductor development.
Area of Science:
- Biomaterials Science
- Bioelectronics
- Protein Engineering
Background:
- Protein and peptide-based materials are crucial for biological processes and bioelectronic devices.
- Demonstrating long-range proton transport in these materials remains a significant challenge.
Purpose of the Study:
- To fabricate and characterize films from a reflectin-derived polypeptide for proton conductivity.
- To investigate the relationship between the polypeptide's structure and its electrical functionality.
Main Methods:
- Fabrication of films from a reflectin-derived polypeptide.
- Electrical interrogation of device-integrated films.
- Physical characterization of the polypeptide films.
Main Results:
- Proton conductivities of approximately 0.4 mS/cm were achieved.
- Proton transport was sustained over distances of approximately 1 mm.
- The polypeptide exhibited characteristics analogous to the parent protein class.
Conclusions:
- The study demonstrates a novel bioinspired material for sustained, long-range proton transport.
- Findings provide insights into structure-function relationships for solid-state bio-proton conductors.
- The research contributes to the development of reflectin-based materials and other bioinspired proton conductors.
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