ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Cadmium selenide (CdSe) have been prepared by the reduction of mixed solution of cadmiumchloride (CdCl2), sodium selenosulfate (Na2SeSO3) and diethanolamine ((CH2CH2OH)2NH) at temperaturesof 80-200°C under Ar atmosphere. Characteristics of CdSe nanoparticles were analyzed usingtransmission electron microscopy (TEM), x-ray photoelectron spectroscopy (XPS) and x-ray diffraction(XRD) and UV-Vis absorption spectra. CdSe samples prepared at relatively low temperature of below100°C showed cubic structure while samples synthesized at temperature above 100°C showed hexagonalphase. The increased reaction temperature caused the particle size increase as well as the agglomerationof particles to form a hollow sphere. UV-Vis absorption spectra also showed a red-shift as increasingreaction temperatures due to the gradual growth of CdSe nanoparticles in the solution. The relativelysharp absorption band from samples synthesized at 80 and 100°C can be attributed to homogeneousparticle size distribution compared with those of prepared at elevated temperatures. This paper willmainly discuss the phase stability of CdSe nanoparticles as well as the hollow sphere formation
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2030.pdf
