Colorimetry technique for scalable characterization of suspended graphene

TL;DR

This paper introduces a non-invasive colorimetry method using Newton rings interference to efficiently characterize suspended graphene membranes, enabling scalable and affordable analysis of their mechanical deformation.

Contribution

The study presents a novel colorimetry technique for parallel, non-invasive characterization of suspended graphene, improving scalability and reducing material impact compared to previous methods.

Findings

Filling the graphene drum with air is 2-5 times slower than purging.

Newton rings interference patterns effectively reveal membrane deformation.

The method allows for real-time analysis of deformation dynamics.

Abstract

Previous statistical studies on the mechanical properties of chemical-vapor-deposited (CVD) suspended graphene membranes have been performed by means of measuring individual devices or with techniques that affect the material. Here, we present a colorimetry technique as a parallel, non-invasive, and affordable way of characterizing suspended graphene devices. We exploit Newton rings interference patterns to study the deformation of a double-layer graphene drum 13.2 micrometer in diameter when a pressure step is applied. By studying the time evolution of the deformation, we find that filling the drum cavity with air is 2-5 times slower than when it is purged.