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http://dx.doi.org/10.4150/KPMI.2008.15.3.210

Preparation and Characteristics of Elongated CdSe nanoparticles  

Kim, Shin-Ho (School of Materials Science and Engineering, Pusan National University)
Park, Myoung-Guk (Korea Institute of Energy Research, Solar Cells Research Center)
Kim, Yang-Do (School of Materials Science and Engineering, Pusan National University)
Publication Information
Journal of Powder Materials / v.15, no.3, 2008 , pp. 210-213 More about this Journal
Abstract
Elongated CdSe nanoparticles with a diameter of 3-7nm have been successfully synthesized using two surfactants of trioctylphospine (TOP) and hexadecylamine (HDA) at $160^{\circ}C$. The formation of elongated CdSe nanoparticles is possibly due to the cooperative effects from both the different binding capability of two surfactants (TOP and HDA) and intrinsically anisotropic crystal structure of the CdSe. The electron diffraction pattern of CdSe nanoparticles revealed the formation of wurzite phase. The CdSe samples showed red-shifted wavelength from 560 to 580nm with increasing the refluxing time due to the gradual growth of CdSe nanoparticles. The relatively broad absorption band can be attributed to the surface state of CdSe nanoparticles. The possible formation mechanism of elongated CdSe nanoparticles was proposed and the characteristics of CdSe have been discussed as well.
Keywords
Cadmium selenide; Elongated structure; Hexadecylamine (HDA);
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