SEMINAR LMGP - June 27, 2023 - Shruti SHARMA

Shruti SHARMA

PhD student
Université Grenoble Alpes, CNRS, Grenoble INP, LMGP

Abstract

An innovative and promising alternative for future electronics is the integration of semiconducting metal oxide nanonets in devices. Zinc Oxide possesses piezoelectric properties which are drastically enhanced in nano-dimensions. A lot of studies have been conducted on the piezoelectric properties of vertically aligned ZnO Nanowires but little knowledge of randomly aligned 2D nanowire networks (NN) are explored. Hence for my work, we have studied the piezotronic behaviour of ZnO nanowire networks by imparting varied orientation and magnitude of strain. Synthesis of ZnO NWs was conducted using hydrothermal method with varied diameters which were then employed for the formation of nanonets. Preliminary studies of piezoelectric behaviour of these semiconducting nanonets integrated on rigid substrate was conducted by using inverse piezoelectric effect. In a second step, fabrication of these nanonet based flexible resistors was conducted to study functional characteristics of both material and devices upon exposure to direct piezoelectric effect. The characteristic morphological behaviour of these semiconducting nanonets was studied using in situ-XRD and in situ-SEM under dynamic strain of increasing amplitude. Eventually, studies were conducted to determine the electrical behaviour of devices upon application of both static and dynamic strain under varied orientation and magnitude of strain. Finally, combining these morphological observations with electrical measurements under static and dynamic strains for various device geometries will give us better understanding of piezoelectric behaviour of the ZnO-nanonet based devices.