PbSe Nanocrystals Synthesized by an Ultrasonic Electrochemical Method

Abstract:

Lead selenide (PbSe) is quite an important semiconductor material with several superior physical properties, e.g. optical and electrical ones. In this paper, PbSe nanocrystals (NCs) with different morphologies such as sphere, rod and hexagon were successfully prepared by an ultrasonic electrochemical method, using sodium citrate as the coordination agent, at room temperature. The crystal structure and the morphology of the as-prepared PbSe NCs were confirmed by means of the Transmission Electron Microscopy (TEM) and X-ray diffractometer (XRD). The ultraviolet-visible Spectrophotometer (UV) was performed to analyze the optical properties of the PbSe NCs. Results show that the nanospheres were about 60 nm in diameter, and the nanorods were 20 nm in diameter with a slenderness ratio of 25. The possible mechanism for the nanorods growth was discussed. The energy gap of the PbSe NCs deduced from the UV-visible spectra was much larger than their bulk counterparts, due to the quantum size effect.

• Periodical: Advanced Materials Research (Volumes 194-196)
• Pages: 545-548
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.194-196.545
• Online since: February 2011
• Authors: Wen Ran Feng, Hai Zhou
• Keywords: Electrochemical (EC), Nanocrystal, PbSe, TEM

References

[1] Y. Xie, H.L. Su, B. Li and Y.T. Qian: Materials Research Bulletin Vol. 35 (2000), p.459.

[2] R.N. Mulik, C.B. Rotti, B.M. More, D.S. Sutrave, G.S. Shahane, K.M. Garadkar, L.P. Deshmukh and P.P. Hankare: Indian J. Pure Appl. Phys. Vol. 34 (1996), p.903.

[3] M.T. Trinh, A.J. Houtepen, J.M. Schins, T. Hanrath, J. Piris, W. Knulst, A.P.L.M. Goossens and L.D.A. Siebbeles: Nano Lett. Vol. 8 (2008), p.1713.

DOI: 10.1021/nl0807225

[4] J.J. Zhu, O. Palchik, S.G. Chen and A. Gedanken: J. Phys. Chem. B Vol. 104 (2000), p.7344.

[5] J.J. Zhu, H. Wang, S. Xu and H.Y. Chen: Langmuir Vol. 18 (2002), p.3306.

[6] U.K. Gautam and R. Seshadri: Materials Research Bulletin Vol. 39 (2004), p.669.

[7] K.S. Cho, D.V. Talapin, W. Gaschler and C.B. Murray: J. Am. Chem. Soc. Vol. 127 (2005), p.7140.

[8] N. Wang, H.L. Su, Q. Dong, D. Zhang and Y.J. Lai: J. Inorganic Materials Vol. 22 (2007), p.209.

[9] W. Zhu, W.Z. Wang and J.L. Shi: J. Phys. Chem. B Vol. 110 (2006), p.9785.

[10] W.Z. Wang, Y. Geng, Y.T. Qian, M.R. Ji and X.M. Liu: Adv. Mater. Vol. 10 (1998), p.1479.

[11] J. Reisse, H. Francois, J. Vandercammen, O. Fabre, M.A. Kirsch-de, C. Maerschalk and J.L. Delplancke: Electrochimica Acta Vol. 39 (1994), p.37.

DOI: 10.1016/0013-4686(94)85008-9

[12] Y. Zhou and G.H. Wu: Material analysis and measurement technology (Ha Erbin Institute of Technology Publication, Ha Erbin, 2001).

[13] H.P. Klug and L.E. Alexander: X-ray Diffraction Procedures for Polycrystalline and Amorphous Materials (Wiley Publication, New York, 1974).

[14] JCPDS No. 6-354.

[15] C. Pacholski, A. Kornowski and H. Weller: Angew. Chem., Int. Ed. Vol. 41 (2002), p.1188.

[16] J.C. Manifacier, J. Gasiot and J.P. Fillard: J. Phys. E Vol. 9 (1976), p.1002.

[17] J. Tauc, R. Grigorovic and A. Vancu: Phys. Status Solidi Vol. 15 (1966), p.627.

[18] E.A. Streltsov, N.P. Osipovich, L.S. Ivashkevich, A.S. Lyakhov and V.V. Sviridov: Electrochim. Acta Vol. 43 (1998), p.869.

DOI: 10.1016/s0013-4686(97)00213-2

[19] L.D. Zhang and J.M. Mu: Nanomaterials and Nanostructures (first ed. Science Publication, Beijing, 2002).