Open Access Nano Express

In situ preparation of fluorescent CdTe quantum dots with small thiols and hyperbranched polymers as co-stabilizers

Yunfeng Shi1*, Zhimin Ma1, Ningning Cui1, Yanli Liu1, Xiaoyu Hou1, Weimin Du1*, Lin Liu1* and Tong Gangsheng2

Author Affiliations

1 School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People's Republic of China

2 Instrumental Analysis Center, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China

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Nanoscale Research Letters 2014, 9:121  doi:10.1186/1556-276X-9-121

Published: 17 March 2014

Abstract

A new strategy for in situ preparation of highly fluorescent CdTe quantum dots (QDs) with 3-mercaptopropionic acid (MPA) and hyperbranched poly(amidoamine)s (HPAMAM) as co-stabilizers was proposed in this paper. MPA and HPAMAM were added in turn to coordinate Cd2+. After adding NaHTe and further microwave irradiation, fluorescent CdTe QDs stabilized by MPA and HPAMAM were obtained. Such a strategy avoids the aftertreatment of thiol-stabilized QDs in their bioapplication and provides an opportunity for direct biomedical use of QDs due to the existence of biocompatible HPAMAM. The resulting CdTe QDs combine the mechanical, biocompatibility properties of HPAMAM and the optical, electrical properties of CdTe QDs together.

Keywords:
Hyperbranched poly (amidoamine) s; Quantum dots; Nanocomposites; Photoluminescence