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Diphenylalanine Peptide Nanotube Energy Harvesters
Lee, Ju-Hyuck,Heo, Kwang,Schulz-Schö,nhagen, Konstantin,Lee, Ju Hun,Desai, Malav S.,Jin, Hyo-Eon,Lee, Seung-Wuk American Chemical Society 2018 ACS NANO Vol.12 No.8
<P>Piezoelectric materials are excellent generators of clean energy, as they can harvest the ubiquitous vibrational and mechanical forces. We developed large-scale unidirectionally polarized, aligned diphenylalanine (FF) nanotubes and fabricated peptide-based piezoelectric energy harvesters. We first used the meniscus-driven self-assembly process to fabricate horizontally aligned FF nanotubes. The FF nanotubes exhibit piezoelectric properties as well as unidirectional polarization. In addition, the asymmetric shapes of the self-assembled FF nanotubes enable them to effectively translate external axial forces into shear deformation to generate electrical energy. The fabricated peptide-based piezoelectric energy harvesters can generate voltage, current, and power of up to 2.8 V, 37.4 nA, and 8.2 nW, respectively, with 42 N of force, and can power multiple liquid-crystal display panels. These peptide-based energy-harvesting materials will provide a compatible energy source for biomedical applications in the future.</P> [FIG OMISSION]</BR>