Electromechanical properties of freestanding graphene functionalized with tin oxide (SnO2) nanoparticles

TL;DR

This study investigates how functionalizing freestanding graphene with SnO2 nanoparticles alters its electromechanical properties, revealing significantly increased out-of-plane movement and proposing a nanoparticle encapsulation model.

Contribution

It introduces a detailed functionalization process and uses advanced microscopy techniques to analyze electromechanical changes in graphene with SnO2 nanoparticles.

Findings

Tenfold increase in out-of-plane movement compared to pristine graphene

Successful uniform functionalization with SnO2 nanoparticles

Proposed nanoparticle encapsulation model

Abstract

Freestanding graphene membranes were functionalized with SnO2 nanoparticles. A detailed procedure providing uniform coverage and chemical synthesis is presented. Elemental composition was determined using scanning electron microscopy combined with energy dispersive X-ray analysis. A technique called electrostatic-manipulation scanning tunneling microscopy was used to probe the electromechanical properties of functionalized freestanding graphene samples. We found ten times larger movement perpendicular to the plane compared to pristine freestanding graphene, and propose a nanoparticle encapsulation model.