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Article
Synthesis and Transformation of Zn-Doped PbS Quantum Dots
The Journal of Physical Chemistry C
  • Xingliang He, Texas A & M University
  • Iraida N. Demchenko, Polish Academy of Sciences
  • Wayne C. Stolte, University of Nevada, Las Vegas
  • Anthony van Buuren, Lawrence Livermore National Laboratory
  • Hong Liang, Texas A & M University
Document Type
Article
Publication Date
1-1-2012
Abstract

A micelle-assisted wet-chemistry route is developed to synthesize pure and Zn-doped lead sulfide (PbS) quantum dots (QDs) and nanocrystals (NCs) under microwave irradiation. The formation mechanism includes three major steps, initialization of π-bonded complex, transformation into a micelle structure, and the dissipation of nanoparticles (NPs). The micelle structure plays an important role in PbS NCs and QDs transformation and formation. X-ray absorption near-edge structure (XANES) analysis confirms the quantum confinement in PbS QDs. The Burstein–Moss effect is responsible for the blue-shift of the absorption induced by Zn doping. This research opens a new way to prepare NCs and QDs that enables high-resolution analysis in quantum refinement and electronic structures. The NCs and QDs produced here have strong potential in applications in optical and electronic communication.

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Citation Information
Xingliang He, Iraida N. Demchenko, Wayne C. Stolte, Anthony van Buuren, et al.. "Synthesis and Transformation of Zn-Doped PbS Quantum Dots" The Journal of Physical Chemistry C (2012) p. 22001 - 22008
Available at: http://works.bepress.com/wayne_stolte/30/