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

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 CO ₂ 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/cm ² , 38 mF/cm ² , and a high energy density of 2.42 mWh/cm ² , 0.05 mWh/cm ² 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.
Competing Interests: Declarations Competing interests Authors have no competing interests. Ethics declarations The plant sample used throughout this work was collected from within the university premises while following the university guidelines pertaining to environment conservation. Any activity that would harm the ecosystem, such as deforestation, has not been entertained throughout the duration of this work.
(© 2024. The Author(s).)