Microscopic piezoelectric response of poly (3-hydroxybutyrate-co-3-hydroxyhexanote) fiber

Abstract

Abstract Microscopic piezoelectric response of a poly (3-hydroxybutyrate-co-3-hydroxyhexanote) (PHBH) fiber, a polymer more biodegradable than poly (lactic acid) (PLA), are observed. The crystallization of PHBH fibers is enhanced by the annealing, and a strong piezoelectric response is observed in the particles. Different positive and negative piezoelectric responses are observed within a single PHBH fiber particle by lateral piezoresponse force microscopy. The piezoelectric response of PHBH fiber is suggested to be due to piezoelectricity, since the molecular chain of PHBH fiber has a helical structure similar to that of PLA and cellulose. In addition, the deformation is confirmed to be a displacement corresponding to particles of 100–300 nm in diameter.