GB/T 43341-2023Nanotechnology—Measurement of defect concentration of graphene—Raman spectroscopy method (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

Introduction

Graphene is composed of a single layer of carbon atoms arranged in a hexagonal honeycomb lattice. Due to its excellent electrical, optical, mechanical and thermal properties, such as Such as high mobility, high transmittance, good flexibility and high thermal conductivity, it has broad application prospects in many fields. Defect concentration as an evaluation It is an important parameter for estimating the quality of graphene and has an important impact on its mobility, thermal conductivity, mechanical properties, etc. Therefore, the defect concentration of graphene is The measurement can not only reveal its intrinsic properties from a scientific perspective, but also provide technical guidance for the production and application of graphene.

Raman spectroscopy technology has the advantages of high efficiency, accuracy, non-destructiveness, simple sample preparation, and the ability to measure large areas, and has been widely used.

In quality testing of graphene. Raman spectroscopy technology can measure various properties of graphene, such as the number of layers, doping levels, stress levels and Defect concentration, etc. Under a specific excitation light energy, the defect concentration of graphene is directly related to the peak area ratio of the D mode and G mode of its Raman spectrum.

Therefore, the defect concentration of graphene can be measured through Raman spectroscopy.

Defect concentration measurements in nanotechnology graphene Raman spectroscopy Warning: This document involves the use of lasers, which may cause irreversible damage to the eyes. It is recommended to wear when using laser Wear corresponding laser protective glasses to avoid looking directly at the laser, which may cause the laser to be reflected by the optical components and enter the eyes. It is also recommended that operators take Receive relevant safety training.

1 Scope

This document describes the method of measuring graphene defect concentration using Raman spectroscopy, including principles, instrument parameter requirements, sample preparation, and test testing steps and data analysis and processing.

This document is applicable to the point defect concentration measurement of single-layer graphene with a lateral size of not less than 2 µm, uniform physical properties, and clean surface.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 33252 Nanotechnology Laser Confocal Raman Microscope Performance Test

JJF1544 Raman spectrometer calibration specifications

3 Terms and definitions

The following terms and definitions apply to this document.