Biotemplated Synthesis of PZT Nanowires
PRINCETON UNIV NJ
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Piezoelectric nanowires are an important class of smart materials for next-generation applications including energy harvesting, robotic actuation, and bioMEMS. Lead zirconate titanate PZT, in particular, has attracted significant attention, owing to its superior electromechanical conversion performance. Yet, the ability to synthesize crystalline PZT nanowires with well-controlled properties remains a challenge. Applications of common nanosynthesis methods to PZT are hampered by issues such as slow kinetics, lack of suitable catalysts, and harsh reaction conditions. Here we report a versatile biomimetic method, in which biotemplates are used to define PZT nanostructures, allowing for rational control over composition and crystallinity. Specifically, stoichiometric PZT nanowires were synthesized using both polysaccharide alginate and bacteriophage templates. The wires possessed measured piezoelectric constants of up to 132 pmV after poling, among the highest reported for PZT nanomaterials. Further, integrated devices can generate up to 0.820 Wcm2 of power. These results suggest that biotemplated piezoelectric nanowires are attractive candidates for stimuli-responsive nanosensors, adaptive nanoactuators, and nanoscale energy harvesters.
- Inorganic Chemistry
- Electrical and Electronic Equipment