Synthesis and Transformation of Zn-Doped PbS Quantum Dots
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- 作者：Xingliang He ; Iraida N. Demchenko ; W. C. Stolte ; Anthony van Buuren ; Hong Liang
- 刊名：The Journal of Physical Chemistry C
- 出版年：2012
- 出版时间：October 18, 2012
- 年：2012
- 卷：116
- 期：41
- 页码：22001-22008
- 全文大小：526K
- 年卷期：v.116,no.41(October 18, 2012)
- ISSN：1932-7455
文摘
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 蟺-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鈥揗oss 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.