Effects of the grafting on the fluorescence properties of CdTe nanocrystals

✍ Scribed by Fang Mei; Xi-Wen He; Wen-You Li; Yu-Kui Zhang

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 513 KB
• Volume: 24
• Category: Article
• ISSN: 1522-7235
• DOI: 10.1002/bio.1123

✦ Synopsis

Abstract

In this paper, we systematically investigated the influence of graft reagents having an amino or a carboxyl terminus with different chain lengths on the fluorescence properties of water‐soluble thioglycolic acid‐stabilized CdTe nanocrystals (TGA–CdTe). Strong enhancement effects of the grafting on the fluorescence intensity of TGA–CdTe were observed. The experiment results demonstrated that short‐chain‐length grafting can increase the fluorescence intensity of CdTe nanocrystals (NCs) better than long‐chain‐length grafting, and the grafting did not influence the emission wavelength of the CdTe NCs. The fluorescence intensity of the carboxyl‐grafted TGA–CdTe was more stable than that of the amino‐grafted TGA–CdTe at wide pH ranges (pH 5.1–10.0). Copyright © 2009 John Wiley & Sons, Ltd.