An Innovative Laser Decal transfer of ZnO Ceramic in LIG for advanced Hybrid Nanogenerator applications

Abstract

This study is focused on utilizing laser technology as a versatile energy source in device fabrication for energy harvesting applications. Dual utilization of CO2 laser is employed for graphene synthesis and selective deposition of ZnO piezo ceramic by laser μ-3D printing. A Piezo-Tribo hybrid nanogenerator is fabricated through selectively transferring ZnO ceramic onto porous laser-induced graphene followed by hydrothermal growth. The Laser decal transfer successfully yields uniform ZnO within porous graphene, facilitating the consistent growth of nanorods in pores. A FEP-ZnO-LIG device is fashioned, synergizing tribo-electricity from FEP-LIG and piezo-electricity due to the presence of ZnO, focusing on energy harvesting to consistently power sensors. ZnO piezo device demonstrates the least voltage and current output (9 V and 270 nA), while the FEP-LIG pair exhibits a higher output of 36 V voltage and 410 nA current. The combination of piezoelectric and electrostatic charge transfer mechanisms in a cascading fashion produces enhanced output voltage (75 V) and current (1.06 μA) compared to individual sum of piezo and tribo pairs. This enhanced performance is possibly attributed to synergistic interaction between ZnO nanostructures and graphene, enhancing charge flow during continuous contact and separation. This technique extends beyond its application for fine-tuning of functional performance in device fabrication. © 2024 Elsevier Ltd and Techna Group S.r.l.