A facile low temperature growth of CdTe nanocrystals using novel dithiocarbamate ligands in aqueous solution

Autor:	Liqin Chen, Biqing Bao, Lianhui Wang, Freddy Yin Chiang Boey, Hua Zhang, Mei Hu, Lihui Yuwen, Yao He, Haoting Lu
Rok vydání:	2010
Předmět:	chemistry.chemical_classification Aqueous solution Photoluminescence Ligand Inorganic chemistry Nucleation Quantum yield General Chemistry Engineering::Materials [DRNTU] chemistry.chemical_compound Monomer chemistry Materials Chemistry Molecule Dithiocarbamate
Zdroj:	Journal of Materials Chemistry. 20:2788
ISSN:	1364-5501 0959-9428
DOI:	10.1039/b924579k
Popis:	Proline dithiocarbamic acid disodium salt (ProDTC) was first explored as a novel ligand, instead of the usual used thiols, for the synthesis of CdTe nanocrystals (NCs). Due to the weak bonding between Cd ions and ProDTC, CdTe NCs show rapid nucleation and growth at much lower temperature (30–50 ᵒC) compared to the traditional synthesis in an aqueous solution. Moreover, faster growth of ProDTC-CdTe NCs under lower pH value was observed, while the thiol-CdTe system has an opposite tendency. The distinct growth kinetics is ascribed to the different complex constants between ProDTC-Cd and thiol-Cd, which has significant influence on the monomer activity. Although the photoluminescence quantum yield (PLQY) of as-prepared NCs was relatively low, it can be easily increased up to about 50% after further treatment of ligand exchange by replacing the surface-binding ProDTC molecules with the mercaptopropionic acid. Accepted version
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89a8aa9b696c81d335d4625cf1cafd82 https://doi.org/10.1039/b924579k Zobrazit plný text záznamu