Document Details

Document Type : Article In Journal 
Document Title :
Effect of Environment on the Preparation of CdSe Quantum Dots Capped with Mercaptoacetic Acid
Effect of Environment on the Preparation of CdSe Quantum Dots Capped with Mercaptoacetic Acid
 
Subject : physics 
Document Language : English 
Abstract : We report a preparation of CdSe quantum dots in the presence of capping molecules under ambient air and argon atmospheres. The growth of the quantum dots with applying an equimolar ratio of precursor of Cd2+ and Se-2 in the presence of a high percentage of the mercaptoacetic acid as capping molecules is studied. Quantum dots are characterized via EDX, transmission electron microscopy, Xray diffraction, thermogravimetric analysis (TGA), UV-Vis optical absorption, Raman and infrared spectroscopy. Combination of EDX and Raman spectroscopy showed a graded diffusion of sulfur on the surface of CdSe quantum dots for the sample prepared under argon atmosphere, while the sample prepared under ambient air atmosphere the sulfur isn't diffused into the CdSe core. In addition, the sample prepared under air revealed a formation of oxides on the surface of the quantum dots. On the other hand, we have studied the nature of capping and how the surface of the quantum dots core is terminated for the prepared samples. In addition, we have studied the acoustic and optical phonons of the quantum dots cores 
ISSN : 1533-4880 
Journal Name : JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 
Volume : 14 
Issue Number : 8 
Publishing Year : 1435 AH
2014 AD 
Article Type : Article 
Added Date : Monday, July 31, 2017 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
S WagehWageh, S InvestigatorDoctorate 
Anwer A HigazyHigazy, Anwer A ResearcherDoctorate 
A.A Al-Ghamdi,Al-Ghamdi, A.A ResearcherDoctorate 
Ahmed S HassounaHassouna, Ahmed S ResearcherDoctorate 

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