Patent ID: 11963450
Assignee: GUANGDONG UNIVERSITY OF TECHNOLOGY
Field: Micro-structural and nano-technology (Chemistry)
Classification: CPC H  B  Y | IPC B  H

Claim 0:
1. A method for manufacturing a core-shell coaxial gallium nitride (GaN) piezoelectric nanogenerator based on wet etching, the core-shell coaxial gallium nitride piezoelectric nanogenerator comprising a core-shell coaxial gallium nitride nanowire array and a flexible substrate; a first conductive layer being provided on a surface of the flexible substrate; the core-shell coaxial gallium nitride nanowire array being fixed to the flexible substrate; a top end of the core-shell coaxial gallium nitride nanowire array being provided with a second conductive layer; the first conductive layer and the second conductive layer being connected to an external circuit via a wire; and a nanowire of the core-shell coaxial gallium nitride nanowire array being covered with an alumina layer; and the method comprising:
covering a center part of a gallium nitride wafer with a mask; and providing a precious metal layer on a surface of the gallium nitride wafer;
removing the mask from the gallium nitride wafer; and performing an electrodeless photoelectrochemical etching on the gallium nitride wafer to form a primary gallium nitride nanowire array on the center part of the gallium nitride wafer;
removing the precious metal layer from the surface of the gallium nitride wafer; and depositing the alumina layer on the surface of the gallium nitride wafer by magnetron sputtering to cover the primary gallium nitride nanowire array to obtain the core-shell coaxial gallium nitride nanowire array; and
providing the first conductive layer on the surface of the flexible substrate; and transferring the core-shell coaxial gallium nitride nanowire array to the flexible substrate; and
providing the second conductive layer at the top end of the core-shell coaxial gallium nitride nanowire array; and connecting the second conductive layer with the external circuit through the wire to obtain the core-shell coaxial gallium nitride piezoelectric nanogenerator;
wherein the first conductive layer is deposited on the flexible substrate by magnetron sputtering; the second conductive layer comprises a metal bonding layer and a gold layer; the metal bonding layer is deposited on the top end of the core-shell coaxial gallium nitride nanowire array by magnetron sputtering; and the gold layer is deposited on the metal bonding layer by magnetron sputtering.