Title

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

Identifier

DOI: 10.1021/jp304728u

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