1 Estimation of Young’s Modulus of Graphene by Raman Spectroscopy Jae-Ung Lee, Duhee Yoon, and Hyeonsik Cheong* Department of Physics, Sogang University, Seoul 121-742, Korea. AUTHOR EMAIL ADDRESS: [email protected]; [email protected]; and [email protected] CORRESPONDING AUTHOR FOOTNOTE: E-mail: [email protected]; TEL: 82-2-705-8434; Fax: 82-2-717-8434. ABSTRACT: The Young’s modulus of graphene is estimated by measuring the strain applied by a pressure difference across graphene membranes using Raman spectroscopy. The strain induced on pressurized graphene balloons can be estimated directly from the peak shift of the Raman G band. By comparing the measured strain with numerical simulation, we obtained the Young’s modulus of graphene. The estimated Young’s modulus values of single- and bi-layer graphene are 2.4±0.4 TPa and 2.0±0.5 TPa, respectively. KEYWORDS: Graphene, Raman spectroscopy, Young’s modulus, strain, graphene balloon The mechanical properties of graphene are interesting research subjects because its Young's modulus and strength are known to be extremely high. Owing to these properties, graphene is a promising
Estimation of Young’s Modulus of Graphene by Raman Spectroscopy
Jun 21, 2023
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