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A Facile Method to Synthesize CdSe-Reduced Graphene Oxide Composite with Good Dispersion and High Nonlinear Optical Properties

Institute of Micro/Nano Photonic Materials and Applications, School of Physics and Electronics, Henan University, Kaifeng 475004, China
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Nanomaterials 2019, 9(7), 957; https://doi.org/10.3390/nano9070957
Received: 29 May 2019 / Revised: 16 June 2019 / Accepted: 18 June 2019 / Published: 30 June 2019
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Abstract

CdSe-reduced graphene oxide (CdSe/RGO) composites were synthesized by a hydrothermal method. CdSe/RGO composites with different mass ratios were prepared. The structure and morphology of CdSe/RGO composites were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The synthesis of CdSe/RGO complexes was successfully demonstrated by Fourier infrared (FT-IR) and Raman spectra. CdSe nanoparticles in the CdSe/RGO composite were uniformly dispersed on the graphene surface. The study found that oxygen-containing functional groups such as hydroxyl (-OH) and carboxyl (-COOH) groups in graphene played a decisive role in the dispersion of CdSe. The third-order nonlinear optical properties of CdSe/RGO composites were measured by a single beam Z-scan technique. The experimental results showed that composites exhibited two-photon absorption and self-focusing nonlinear refraction properties. Additionally, the third-order nonlinear susceptibility of the composite material was obviously enhanced, which was mainly due to the good dispersion of CdSe nanoparticles on graphene. View Full-Text
Keywords: CdSe/RGO nanocomposites; carboxyl groups; third-order nonlinear optical property; Z-scan technique; good dispersion CdSe/RGO nanocomposites; carboxyl groups; third-order nonlinear optical property; Z-scan technique; good dispersion
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Li, P.; Zhu, B.; Li, P.; Zhang, Z.; Li, L.; Gu, Y. A Facile Method to Synthesize CdSe-Reduced Graphene Oxide Composite with Good Dispersion and High Nonlinear Optical Properties. Nanomaterials 2019, 9, 957.

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