Raman scattering for the size of CdSe and CdS nanocrystals and comparison with other techniques |
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| Authors: | Yung-Tang Nien Badruz Zaman In-Gann Chen Chii-Shyang Hwang Kui Yu |
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| Affiliation: | a Center for Micro/Nano Science and Technology, Department of Materials Science and Engineering, National Cheng Kung University, 1 Ta-Hsueh Road, Tainan 701, Taiwan
b Steacie Institute for Molecular Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa ON, Canada K1A 0R6 |
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| Abstract: | The sizes of the ensembles of CdSe regular nanocrystals (RNCs), CdSe magic-sized nanocrystals (MSNCs), and CdS RNCs were investigated by Raman scattering. The nanocrystal ensembles were synthesized via wet-chemistry approaches. The size distribution increases from CdSe MSNCs (2.26 nm), to CdSe RNCs (3.52 nm), and to CdS RNCs (3-8 nm and 4-10 nm). The sizes derived from Raman spectra are compared with those from other characterization tools such as UV/vis spectroscopy and transmission electron microscopy (TEM). The present study suggests that Raman scattering is an alternative and reliable technique for the determination of nanocrystal size and size distribution. |
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| Keywords: | Characterization methods Crystal growth Luminescence Nanomaterials Semiconductors |
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