Synthesis and Transformation of Zn-Doped PbS Quantum Dots
| Autor: | W.C. Stolte, Anthony van Buuren, Xingliang He, Hong Liang, I. N. Demchenko |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Materials science
chemistry.chemical_element Nanoparticle Nanotechnology Zinc Micelle XANES Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy chemistry Nanocrystal Quantum dot Lead sulfide Physical and Theoretical Chemistry Absorption (electromagnetic radiation) |
| Zdroj: | The Journal of Physical Chemistry C. 116:22001-22008 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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