Synthesis and characterization of ZnxHg1xSe yS1y quantum dots

Guo Yu Lan, Yang-Wei Lin, Zong Hong Lin, Huan Tsung Chang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This article describes the synthesis of highly water-soluble Zn xHgISeyS1-y quantum dots (QDs) in aqueous solution through a simple photoassisted reaction between ZnSe QDs and mercury(I) nitrate dihydrate [Hg2(NO3)2.2H2O]. In order to deduce the optimal synthesis conditions, we varied several parameters, including the concentrations of mercaptosuccinic acid (MSA) and Hg 2(NO3)22H2O, the illumination time, and the reaction temperature. When irradiated at temperatures below 80 °C, the ZnSe QDs reacted with the S2- ions formed rapidly from MSA and the Hg22+ ions formed from Hg22+ Ions to form ZnxHg1-xSeyS1-y QDs through a process ofphoto-etching and surface combination. Under different conditions, we prepared a series of ZnxHg1-x SeyS1-y QDs that emit fluorescence at the maximum wavelengths ranging from 405 to 760 nm. Inductively coupled plasma-mass spectrometry and transmission electron microscopy/energy dispersive spectrometry revealed that the content of Hg in the ZnxHg1-xSey S1-y QDs was greater when the synthesis was conducted at higher temperature. The Zn0.88Hg 0.12Se0.44 S0.56 QDs exhibit improved photostability than crude ZnSe QDs and possess long lifetimes (τ1 ∼ 38 ns and τ2 ∼ 158 ns).

Original languageEnglish
Pages (from-to)1377-1388
Number of pages12
JournalJournal of Nanoparticle Research
Volume12
Issue number4
DOIs
Publication statusPublished - 2010 May 1

Fingerprint

Quantum Dots
Semiconductor quantum dots
quantum dots
Synthesis
synthesis
Ions
Inductively coupled plasma mass spectrometry
ions
acids
Acids
Mercury
inductively coupled plasma mass spectrometry
Nitrate
Mass Spectrometry
Transmission Electron Microscopy
Etching
Nitrates
Fluorescence
Temperature
Spectrometry

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Lan, Guo Yu ; Lin, Yang-Wei ; Lin, Zong Hong ; Chang, Huan Tsung. / Synthesis and characterization of ZnxHg1xSe yS1y quantum dots. In: Journal of Nanoparticle Research. 2010 ; Vol. 12, No. 4. pp. 1377-1388.
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Synthesis and characterization of ZnxHg1xSe yS1y quantum dots. / Lan, Guo Yu; Lin, Yang-Wei; Lin, Zong Hong; Chang, Huan Tsung.

In: Journal of Nanoparticle Research, Vol. 12, No. 4, 01.05.2010, p. 1377-1388.

Research output: Contribution to journalArticle

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