Cation exchange mediated synthesis of bright Au@ZnTe core–shell nanocrystals
Open Access
- 16 October 2020
- journal article
- research article
- Published by IOP Publishing in Nanotechnology
- Vol. 32 (2), 025603
- https://doi.org/10.1088/1361-6528/abbb02
Abstract
The synthesis of heterostructured core-shell nanocrystals has attracted significant attention due to their wide range of applications in energy, medicine and environment. To further extend the possible nanostructures, non-epitaxial growth is introduced to form heterostructures with large lattice mismatches, which cannot be achieved by classical epitaxial growth techniques. Here, we report the synthetic procedure of Au@ZnTe core-shell nanostructures by cation exchange reaction for the first time. For that, bimetallic Au@Ag heterostructures were synthesized by using PDDA as stabilizer and shape-controller. Then, by addition of Te and Zn precursors in a step-wise reaction, the zinc and silver cation exchange was performed and Au@ZnTe nanocrystals were obtained. Structural and optical characterization confirmed the formation of the Au@ZnTe nanocrystals. The optimization of the synthesis led to the bright nanocrystals with a photoluminescence quantum yield up to 27%. The non-toxic, versatile synthetic route, and bright emission of the synthesized Au@ZnTe nanocrystals offer significant potential for future bio-imaging and optoelectronic applications.Keywords
Funding Information
- European Research Council (European Union’s Horizon 2020)
This publication has 37 references indexed in Scilit:
- A model for the recombination and radiative lifetime of trions and biexcitons in spherically shaped semiconductor nanocrystalsApplied Physics Letters, 2013
- Mechanisms in photoluminescence enhancement of ZnO nanorod arrays by the localized surface plasmons of Ag nanoparticlesApplied Surface Science, 2012
- Four-Fold Enhancement of the Activation Energy for Nonradiative Decay of Excitons in PbSe/CdSe Core/Shell versus PbSe Colloidal Quantum DotsThe Journal of Physical Chemistry Letters, 2010
- l-Cysteine-Assisted Growth of Core−Satellite ZnS−Au Nanoassemblies with High Photocatalytic EfficiencyLangmuir, 2009
- Versatile Strategy for Precisely Tailored Core@Shell Nanostructures with Single Shell Layer Accuracy: The Case of Metallic ShellNano Letters, 2009
- Utilizing the Lability of Lead Selenide to Produce Heterostructured Nanocrystals with Bright, Stable Infrared EmissionJournal of the American Chemical Society, 2008
- Structural Basis for Near Unity Quantum Yield Core/Shell NanostructuresNano Letters, 2006
- Selective Growth of Metal Tips onto Semiconductor Quantum Rods and TetrapodsScience, 2004
- Epitaxial Growth of Highly Luminescent CdSe/CdS Core/Shell Nanocrystals with Photostability and Electronic AccessibilityJournal of the American Chemical Society, 1997
- Hard and Soft Acids and BasesJournal of the American Chemical Society, 1963