Paper Title:
Poly(4-vinylpyridine) Coated CdTe Core/Shell Quantum Dots
  Abstract

A kind of novel quantum dots (QDs) with poly(4-vinylpyridine) (PVPy) as shell and CdTe QDs as core was presented in this work. This core/shell ODs can conjugate DNA easily because the surface pyridyl exist on QDs, and which has potential application in DNA biosensors field. CdTe QDs were prepared in aqueous solution with 3-mercaptopropionic acid (MPA) as stabilizer. It was found that the fluorescent intensity of QDs was depended the reflux time. Following the increase of reflux time, the fluorescent intensity of QDs reached the maximum at 10 h with about 10 nm in diameters. And the fluorescent intensity of QDs was also increased. When the reflux time was 10 h, the diameter of QDs would increase to about 10 nm. After adjusted the pH of QDs solution system to 7.0, the MPA stabled QDs were purified by ultracentrifugation and freeze-drying respectively. The polymerization was performed in water when 4-vinylpyridine (VPy) used as monomer, N,N’-methylene-bisacrylamide (MBAAm) as crosslinker, potassium persulphate (PPS) as initiator and MPA stabled QDs as seeds. The surface carboxyl of MPA on QDs could promote the form of PVPy coated CdTe QDs. It was shown that the fluorescent intension of core/shell QDs was decreased following the polymerization and the diameter of QDs could increase to 20-30 nm.

  Info
Periodical
Advanced Materials Research (Volumes 60-61)
Edited by
Xiaohao Wang
Pages
114-118
DOI
10.4028/www.scientific.net/AMR.60-61.114
Citation
Z. Dai, P. Li, J. M. Zhang, S. C. Xu, N. Guo, G. Zheng, B. Sun, "Poly(4-vinylpyridine) Coated CdTe Core/Shell Quantum Dots ", Advanced Materials Research, Vols. 60-61, pp. 114-118, 2009
Online since
January 2009
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Young Joo Na, Sang Joon Park, Ji Hyeon Kim, Jong Sung Kim
Abstract:The core-shell structure of dye-silica nanoparticle has been prepared. The dye-silica nanoparticle can be used as a substitute of...
651
Authors: Chang Ni Wu, Yang Chen
Chapter 2:Materials Science and Bioengineering
Abstract:Macromolecular polymer polyethylenimine (PEI) modified by many luminescent lanthanide complexes was prepared and purified. The spectral...
212
Authors: Datchanee Kraisiri, Nuanphun Chantarasiri, Vimolvan Pimpan
Chapter 1: Materials Behavior
Abstract:Fluorescent acrylamide water soluble macromer was synthesized from dimethylaminopropylmethacrylamide-9-(chloromethyl)anthracene quaternary...
216
Authors: Miao Wang, Si Yuan Xu, Yong Xin She, Mao Jun Jin, Fen Jin, Hua Shao, Jing Wang
Chapter 5: Optical/Electronic/Magnetic Materials
Abstract:A simple and convenient method to make a novel material of DNA-coated magnetic-fluorescent composite particles was presented in this article....
669
Authors: Jing Liu
Chapter 2: Materials Science and Engineering
Abstract:Series of the triazene-cinnamic acid polymeric fluorescent brighteners were synthesized through three-step condensation reactions and...
868