Enhanced output of nanostructured piezoelectric arrays via controlled matrix/transducer interfacial interactions

摘要

Here we investigate the effects of interfacial interactions and the mechanical properties of the matrix on the piezoelectric output of vertically aligned ZnO nanowires (NWs) embedded in a polymer matrix. This matrix-assisted energy conversion platform allows non-mechanical energy sources to apply stress to the NWs, producing direct-current outputs. The slip conditions at the matrix/transducer interface were experimentally modified using adhesion promoters and different molecular weight matrices which were compared to finite element method simulations. The no-slip conditions showed a 2-fold enhancement in the output whereas a 72% increase in the matrix modulus resulted in a 2.5-fold enhancement.