EFEITO DA ESTRUTURA MOLECULAR DE LIGANTES DE SUPERFÍCIE EM PONTOS QUÂNTICOS DE CdTe DISPERSOS EM ÁGUA

EFEITO DA ESTRUTURA MOLECULAR DE LIGANTES DE SUPERFÍCIE EM PONTOS QUÂNTICOS DE CdTe DISPERSOS EM ÁGUA

Water-soluble CdTe quantum dots are synthesized to investigate how short-chain surface ligands bearing -SH, -COOH, and -NH2 groups interact with CdTe during nucleation/growth processes. Their optical properties and colloidal stability after the ligand exchange are also investigated. We then characte...

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Bibliographic Details
Main Authors: Brener R. C. Vale, Kayo O. Vieira, José C. L. Sousa, Jefferson L. Ferrari, Marco A. Schiavon
Format: Article
Language:English
Published: Sociedade Brasileira de Química 2015-01-01
Series:Química Nova
Subjects:
Quantum dots
CdTe
surface ligand
MEA
MPA
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000100022&lng=en&tlng=en
Description
Summary:Water-soluble CdTe quantum dots are synthesized to investigate how short-chain surface ligands bearing -SH, -COOH, and -NH2 groups interact with CdTe during nucleation/growth processes. Their optical properties and colloidal stability after the ligand exchange are also investigated. We then characterize the resulting CdTe by fluorescence, UV–Vis absorption, and infrared spectroscopies. The stability of the colloidal dispersions was determined by their Zeta potentials. The results show that in the synthesis of water-soluble CdTe, surface ligands with at least two functional groups are required and the hard/soft character of them is an important factor in the stability of CdTe.
ISSN:1678-7064

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