Synthesis and Transformation of Zn-Doped PbS Quantum Dots
Document Type
Article
Publication Date
2012
Publication Title
The Journal of Physical Chemistry C
First page number:
22001
Last page number:
22008
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.
Keywords
Lead sulfide; Nanocrystals; Quantum dots; Zinc
Disciplines
Biological and Chemical Physics | Chemistry | Physical Chemistry | Physics
Language
English
Permissions
Use Find in Your Library, contact the author, or use interlibrary loan to garner a copy of the article. Publisher copyright policy allows author to archive post-print (author’s final manuscript). When post-print is available or publisher policy changes, the article will be deposited
Repository Citation
He, X.,
Demchenko, I. N.,
Stolte, W. C.,
van Buuren, A.,
Liang, H.
(2012).
Synthesis and Transformation of Zn-Doped PbS Quantum Dots.
The Journal of Physical Chemistry C
22001-22008.