Highly conducting Laser-Induced Graphene-Ag nanoparticle composite as an effective supercapacitor electrode with anti-fungal properties

Abhishek Prakash; Sowmya R Holla; Subbalaxmi Selvaraj; Ramakrishna Nayak; Shounak De; Mohammad Saquib; M Selvakumar

doi:10.1038/s41598-024-79382-3

Highly conducting Laser-Induced Graphene-Ag nanoparticle composite as an effective supercapacitor electrode with anti-fungal properties

Sci Rep. 2024 Nov 13;14(1):27849. doi: 10.1038/s41598-024-79382-3.

Authors

Abhishek Prakash¹, Sowmya R Holla², Subbalaxmi Selvaraj³, Ramakrishna Nayak⁴, Shounak De¹, Mohammad Saquib⁵, M Selvakumar⁵

Affiliations

¹ Department of Electronics & Communication Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, 576104, India.
² Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, 576104, India. sowmya.achar@manipal.edu.
³ Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, 576104, India. subbalaxmi.s@manipal.edu.
⁴ Department of Humanities and Management, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
⁵ Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, 576104, India.

Abstract

This study presents a simple and an environmentally friendly approach to make Laser-Induced Graphene (LIG) based supercapacitor electrodes anchored with abundant Silver Nanoparticles (AgNPs). LIG, was synthesized using a CO₂ laser writing technique on polyimide substrate. The LIG-Ag composite was prepared using two techniques, drop-coating, and screen-printing. Ag nanoparticles prepared using the plant extract of Swietenia Macrophylla was utilized to drop-coat AgNP on LIG substrate. Screen-printing was done by using a commercial Ag-ink and a suitable mesh. The supercapacitor made from screen-printed electrodes and supercapacitor made form drop-coated electrodes showed a high specific capacitance of 118 mF/cm², 38 mF/cm², and a high energy density of 2.42 mWh/cm², 0.05 mWh/cm² respectively. The screen-printed composite of LIG and AgNP was further studied for its anti-fungal properties and proved to be effective against Candida sp.

Keywords: Antifungal agent; Green-synthesis; Laser-Induced Graphene; Microsupercapacitor; Silver Nanoparticles.