Document Details

Document Type : Article In Journal 
Document Title :
Aqueous synthesis and characterization of CdTe@Co(OH)2 (core-shell) composite nanoparticles
Aqueous synthesis and characterization of CdTe@Co(OH)2 (core-shell) composite nanoparticles
 
Subject : Biological 
Document Language : English 
Abstract : Multi-functional CdTe@Co(OH)2 core-shell nanoparticles were synthesized in aqueous solution by a seed-mediated growth approach. Initially, CdTe nanocrystals were synthesized with bi-functional molecule mercaptoacetic acid as a stabilizer. The Co2+ in the form of Co(NO3) 2 was added to CdTe nanocrystals in aqueous solution and slowly hydrolyzed to deposit a layer of hydroxide (Co(OH)2) onto the luminescent CdTe nanocrystals as a core in the presence of stabilizer at pH ≈ 11.2. The synthesized CdTe@Co(OH)2 core-shell composite nanoparticles were characterized with XRD, EDAX, TEM, FT-IR, Raman, EPR, and thermal analysis (TG/DTG curves). The effect of refluxing time and the concentration of Co2+ on the optical properties of these samples were evaluated using UV-Visible absorption and photoluminescence analysis. The emission peak of the (CdTe@Co(OH)2) composite nanoparticles shifted to 626 nm from 605 nm (CdTe seed). The sizes of CdTe and CdTe@Co(OH)2 composite nanoparticles averaged about 3.43 nm and 6.12 nm, respectively. 
ISSN : 0254-0584 
Journal Name : Materials Chemistry and Physics 
Volume : 124 
Issue Number : 1 
Publishing Year : 1431 AH
2010 AD 
Article Type : Article 
Added Date : Saturday, October 29, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
M S Abd El-SadekAbd El-Sadek, M SResearcherDoctorateel_sadek_99@yahoo.com
J Ram KumarKumar, J RamResearcherDoctorate 
S Moorthy BabuBabu, S MoorthyResearcherDoctorate 
سالم محمود الحميديEl-Hamidy, Salim MResearcherDoctorate 

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