Journal of Materials Science

, Volume 46, Issue 17, pp 5732–5736 | Cite as

Synthesis and characterization of water-soluble l-cysteine-modified ZnS nanocrystals doped with silver

  • Fenghua HuangEmail author
  • Yaling Lan
  • Peifeng Chen


The water-soluble Ag+-doped ZnS nanocrystals surface capped with cysteine (expressed as ZnS:Ag/Cys) were synthesized in aqueous solution by using l-cysteine as surface modifier. The crystal structure, size, shape, component, and spectral properties of ZnS:Ag/Cys nanocrystals were characterized by X-ray power diffraction, transmission electron microscope, energy dispersive X-ray analysis, inductively coupled plasma atomic emission spectrometry, infrared spectrum, UV–Vis absorption spectrum, and photoluminescence spectrum. The results show that the spherical ZnS:Ag/Cys nanocrystals with an average diameter of 2.6 nm have good fluorescent characteristics, their fluorescence intensity is enhanced greatly after doped with Ag+. And the sulfur atoms in cysteine molecules are coordinated with metal ions on the surface of the nanocrystals, the cysteine modified on the surface of ZnS:Ag/Cys nanocrystals renders the nanocrystals water soluble and biocompatible. The ZnS:Ag/Cys nanocrystals have potential applications in molecular assembly and biological fluorescence analysis.


Inductively Couple Plasma Atomic Emission Spectrometry Ag2S Couple Plasma Atomic Emission Spectrometry Inductively Couple Plasma Atomic Emission Spectrometry Analysis Dope Nanocrystals 



This project is financially supported by the Nature Science Foundation of Fujian Province of China (2009J01022), and the Science Foundation of Department of Education of Fujian Province of China (JB07075).


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.College of Chemistry and Material ScienceFujian Normal UniversityFuzhouPeople’s Republic of China
  2. 2.Key Laboratory of Polymer Materials of Fujian ProvinceFuzhouPeople’s Republic of China

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