Strong piezoelectricity in bioinspired peptide nanotubes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 20131852.
- Also identified by DOI 10.1021/nn901327v.
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Abstract
We show anomalously strong shear piezoelectric activity in self-assembled diphenylalanine peptide nanotubes (PNTs), indicating electric polarization directed along the tube axis. Comparison with well-known piezoelectric LiNbO(3) and lateral signal calibration yields sufficiently high effective piezoelectric coefficient values of at least 60 pm/V (shear response for tubes of approximately 200 nm in diameter). PNTs demonstrate linear deformation without irreversible degradation in a broad range of driving voltages. The results open up a wide avenue for developing new generations of "green" piezoelectric materials and piezonanodevices based on bioactive tubular nanostructures potentially compatible with human tissue.
Medical subject headings
- Biomimetic Materials
- Electricity
- Nanotubes
- Phenylalanine
- Stress, Mechanical