Preparation of Doped Graphene Quantum Dots with Bright and Excitation-Independent Blue Fluorescence

Abstract:

Highly bright-fluorescent N (nitrogen), S (sulfur) co-doped graphene quantum dots (GQDs) were synthesized through an modified hydrothermal method. The doped GQDs are smaller than 10 nm in size in average and stable in aqueous solution. Unlike many reports on graphene oxide (GO), the as-synthesized doped GQDs exhibit bright blue photoluminescence (PL) emission and the emission wavelength is excitation-independent. The intriguling results indicate that GQDs may have great potential in the optic and optoelectronic applications.

• Periodical: Advanced Materials Research (Volume 950)
• Pages: 44-47
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.950.44
• Online since: June 2014
• Authors: Hui Li*, Hai Ping He, Zhi Zhen Ye
• Keywords: Doping, Fluorescence, GQDs

References

[1] A. K. Geim, K. S. Novoselov. Nature Mater., Vol. 6 (2007), p.183.

[2] K. S. Novoselov, V. I. Fal'ko, L. Colombo, P. R. Gellert, M. G. Schwab, K. Kim. Nature, Vol. 490 (2012), p.192.

DOI: 10.1038/nature11458

[3] K. S. Novoselov, A. K. Geim, S. V. Morozov, D. Jiang, Y. Zhang, S. V. Dubonos, I. V. Grigorieva, A. A. Firsov, Vol. 306 (2004), p.666.

DOI: 10.1126/science.1102896

[4] X. Sun, Z. Liu, K. Welsher, J. T. Robinson, A. Goodwin, S. Zaric, H. Dai, Vol. 1 (2008), p.203.

[5] D. Pan, J. Zhang, Z. Li, M. Wu, Adv. Mater., Vol. 22 (2010), p.734.

[6] K. J. Jeon, Z. Lee, E. Pollak, L. Moreschini, A. Bostwick, C. M. Park, R. Mendelsberg, V. Radmilovic, R. Kostecki, T. J. Richardson, E. Rotenberg. ACS Nano, Vol. 5 (2011), p.1042.

DOI: 10.1021/nn1025274

[7] Q. Mei, K. Zhang, G. Guan, B. Liu, S. Wang, Z. Zhang. Chem. Comm., Vol. 46 (2010), p.7319.

[8] H. Tetsuka, R. Asahi, A. Nagoya, K. Okamoto, I. Tajima, R. Ohta, A. Okamoto. Adv. Mater., Vol. 24 (2012), p.5333.

DOI: 10.1002/adma.201201930

[9] S. Zhu, J. Zhang, C. Qiao, S. Tang, Y. Li, W. Yuan, B. Li, L. Tian, F. Liu, R. Hu, H. Gao, H. Wei, H. Zhang, H. Sun, B. Yang. Chem. Comm. Vol. 47 (2011), p.5333.

[10] Y. Li, Y. Hu, Y. Zhao, G. Shi, L. Deng, Y. Hou, L. Qu. Adv. Mater., Vol. 23 (2011), p.776.

[11] Q. Liu, B. Guo, Z. Rao, B. Zhang, J. R. Gong. Nano. Lett., Vol. 13 (2013), p.2436.

[12] L. L. Li, J. Ji, R. Fei, C. Z. Wang, Q. Lu, J. R. Zhang, L. P. Jiang, J. J. Zhu. Adv. Funct. Mater., Vol. 22 (2012), p.2971.

[13] Y. Dong, H. Pang, H. Yang, C. Guo, J. Shao, Y. Chi, C. Li, T. Yu. Angew. Chem. Int. Ed., Vol. 52 (2013), p.7800.

[14] J. Liang, Y. Jiao, M. Jaroniec, S. Z. Qiao. Angew. Chem. Int. Ed., Vol. 51 (2012), p.11496.

[15] N. I. Kovtyukhova, P. J. Ollivier, B. R. Martin, T. E. Mallouk, S. A. Chizhik, E. V. Buzaneva, and A. D. Gorchinskiy, Chem. Mater., Vol. 11 (1999), p.771.

DOI: 10.1021/cm981085u

[16] R. Liu, D. Wu, S. Liu, K. Koynov, W. Knoll, Q. Li. Angew. Chem. Int. Ed. Vol. 48 (2009), p.4598.

[17] S. K. Cushing, M. Li, F. Huang, N. Wu. ACS Nano, Vol. 8 (2014), p.1002.