C96H30 tailored single-layer and single-crystalline graphene quantum dots

Biao Yuan; Xingming Sun; Jun Yan; Zheng Xie; Ping Chen; Shuyun Zhou

doi:10.1039/C6CP03453E

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C₉₆H₃₀ tailored single-layer and single-crystalline graphene quantum dots†

Biao Yuan,^ab Xingming Sun,^a Jun Yan,^a Zheng Xie,*^a Ping Chen^a and Shuyun Zhou*^a

Author affiliations

* Corresponding authors

^a Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Haidian District, Beijing, China
E-mail: zhengxie@mail.ipc.ac.cn, zhou_shuyun@mail.ipc.ac.cn

^b University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing, China

Abstract

By controllable synthesis of a carbon precursor and with a suitable preparation routine, a series of single-layer and single-crystalline graphene quantum dots (GQDs) with uniform size distribution were prepared from C₉₆H₃₀. It was found that the absorption, photoluminescence (PL) and two-photon photoluminescence (TPPL) show a high size-dependent effect with a redshift that occurs as the size grows. Two-photon absorption (TPA) properties of GQDs were measured at 800 nm under a femtosecond pulse laser. Two-photon bioimaging of HeLa cells was carried out to determine TPA properties. Most significantly, the as-prepared GQDs showed potential in a practical application in two-photon cell bioimaging due to their high contrast TPPL. In addition, the superior nonlinear absorption, stable TPPL and excellent solubility were beneficial to the optical limiting (OL) properties.

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Article information

DOI: https://doi.org/10.1039/C6CP03453E
Article type: Paper
Submitted: 20 May 2016
Accepted: 05 Aug 2016
First published: 11 Aug 2016

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Phys. Chem. Chem. Phys., 2016,18, 25002-25009

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C₉₆H₃₀ tailored single-layer and single-crystalline graphene quantum dots

B. Yuan, X. Sun, J. Yan, Z. Xie, P. Chen and S. Zhou, Phys. Chem. Chem. Phys., 2016, 18, 25002 DOI: 10.1039/C6CP03453E

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