Electrospun fibers of polymer, composites, ceramics, metal, cellulose, etc. are all an interesting choice. But the one which could be piezoelectric is not so much mentioned.
Electrospun fibers of PVDF should be biocompatible, in order to use with human, medical applications etc. As far as I know its has never been tested if it is biodegradable or not. I might be wrong. Anyway, biodegradeble is different from biocompatible or not, or they are the same. ?
I've just realized that the electrospun fibers of piezoelectric lead-free ceramics have recently been reported. Thanks to my friend (in other topic) in the RG for guiding me this article : Fabrication of Ca, Zr, doped BaTiO3 ferroelectric nanofibers by electrospinning by A. Jalalian et al. 2012.
piezoelectric effect- when a compressive or tensile force acts on a piezoelectric material , it generates the electric signals in proportion to the magnitude of applied force.
If the piezoelectric effect generates the electric signal proportional to the magnitude of applied force, why most people do not fabricate electrospun piezoelectric fiber? Biocompatible fiber which is piezoelectric would be of help in medical applications more than electrospun ceramic fibers.
The shape and dimension of the piezoelectric materials play important role in how we want to implement them. In case of fiber-like piezoelectric material when it is stretched or deformed under applied stress , a small electrical energy could be generated. And it is anticipated to be useful in, for instance, bionanotechnology.