Abstract
This paper describes a novel method for surface modification of water soluble CdTe quantum dots (QDs) by using poly(acrylic acid) grafted onto salep (salep‐g‐PAA) as a biopolymer. As‐prepared CdTe‐salep‐g‐PAA QDs were characterized by Fourier transform infrared (FT‐IR) spectrum, thermogravimetric (TG) analysis, and transmission electron microscopy (TEM). The absorption and fluorescence emission spectra were measured to investigate the effect of salep‐g‐PAA biopolymer on the optical properties of CdTe QDs. The results showed that the optical properties of CdTe QDs were significantly enhanced by using salep‐g‐PAA‐based biopolymer.
Highlights
CdTe quantum dots (QDs) are novel high-efficiency fluorescence materials with unique chemical and physical properties [1,2,3]
Water-soluble CdTe QDs can be synthesized through the selection of appropriate ligand molecules such as thioglycolic acid (TGA) and 3-mercaptopropionic acid, but low quantum yields (QYs) are typically obtained [15,16,17]
We present a novel strategy for surface modification of CdTe QDs by poly(acrylic acid) grafted onto salep (Scheme 1)
Summary
CdTe quantum dots (QDs) are novel high-efficiency fluorescence materials with unique chemical and physical properties [1,2,3]. Salep is a nontoxic and stable water-soluble polysaccharide extracted from dried tubers of certain natural terrestrial orchids possessing interesting gelling properties widely explored for a variety of life science applications. It is a biopolymer composed of a linear copolymer which consists of glucomannan (16–60%), starch (2.7%), nitrogenous substance (5%), moisture (12%), and ash (2.4%) [21,22,23]. We present a novel strategy for surface modification of CdTe QDs by poly(acrylic acid) grafted onto salep (salep-g-PAA) (Scheme 1) This new synthesis procedure was carried out in aqueous phase at low temperature conditions and can be a good candidate for wide applications in biological detection
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