Facile preparation and upconversion luminescence of graphene quantum dots |
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| Authors: | Shen Jianhua Zhu Yihua Chen Cheng Yang Xiaoling Li Chunzhong |
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| Affiliation: | Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China. |
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| Abstract: | A facile hydrazine hydrate reduction of graphene oxide (GO) with surface-passivated by a polyethylene glycol (PEG) method for the fabrication of graphene quantum dots (GQDs) with frequency upconverted emission is presented. And we speculate on the upconversion luminescence due to the anti-Stokes photoluminescence (ASPL), where the δE between the π and σ orbitals is near 1.1 eV. |
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