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Magic size InP and InAs clusters: synthesis, characterization and shell growth
1Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel. uri.banin@mail.huji.ac.il.
Chemical Communications (Cambridge, England)
|February 15, 2017
Summary
Synthesized magic-sized semiconductor nanoclusters transform with heating, enabling size control. Shell growth on Indium Phosphide (InP) nanoclusters achieved blue fluorescence, though defects limited quantum yield.
Area of Science:
- Materials Science
- Nanotechnology
- Semiconductor Physics
Background:
- Magic-sized nanoclusters exhibit unique quantum confinement effects.
- Controlling nanocluster size is crucial for tuning optical and electronic properties.
- Semiconductor nanoclusters are promising for optoelectronic applications.
Purpose of the Study:
- To synthesize magic-sized III-V semiconductor nanoclusters.
- To investigate the size transformation of nanoclusters upon heating.
- To functionalize Indium Phosphide (InP) nanoclusters with shells for enhanced fluorescence.
Main Methods:
- Synthesis of magic-sized III-V semiconductor nanoclusters.
- Absorption spectroscopy to monitor spectral transitions during heating.
- Shell growth (ZnS and ZnSe) on Indium Phosphide (InP) nanoclusters.
Main Results:
- Observed non-continuous spectral shifts indicating size transformations upon mild heating.
- Demonstrated successful shell growth on InP nanoclusters.
- Achieved blue fluorescence, but quantum yield was limited by interfacial defects in thick ZnS shells.
Conclusions:
- Magic-sized nanoclusters can undergo controlled size transformations.
- Surface functionalization of InP nanoclusters is feasible for optoelectronic applications.
- Interfacial defect management is critical for optimizing quantum yield in core-shell nanostructures.
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