Piezo‐Semiconductive Quasi‐1D Nanodevices with or without Anti‐Symmetry

• DOI: 10.1002/adma.201104588
• Publication Date: 2012-04-30T07:24:14Z
• Authors: Rodolfo Araneo; Giampiero Lovat; Paolo Burghignoli; Christian Falconi
• Keywords: Semiconductors; piezotronics; anti-symmetry; nanogenerators; nanowires; piezophototronics; energy harvesting; Settore ING-INF/01 - ELETTRONICA; Electric Conductivity; Nanotechnology; 02 engineering and technology; 0210 nano-technology; Mechanical Phenomena

The piezopotential in floating, homogeneous, quasi-1D piezo-semiconductive nanostructures under axial stress is an anti-symmetric (i.e., odd) function of force. Here, after introducing piezo-nano-devices with floating electrodes for maximum piezo-potential, we show that breaking the nature piezopotential-force relation, instance by using conical nanowires, can lead to better nanogenerators, piezotronic and piezophototronic devices.