Structure direction of II-VI semiconductor quantum dot binary nanoparticle superlattices by tuning radius ratio.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 19206340.
- Also identified by DOI 10.1021/nn800129s.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
We report a nanoparticle radius ratio dependent study of the formation of binary nanoparticle superlattices (BNSLs) of CdTe and CdSe quantum dots. While keeping all other parameters identical in the system, the effective nanoparticle radius ratio, gamma(eff), was tuned to allow the formation of five different BNSL structures, AlB(2), cub-NaZn(13), ico-NaZn(13), CaCu(5), and MgZn(2). For each structure, gamma(eff) is located close to a local maximum of its space-filling factor, based on a model for space filling principles. We demonstrate the ability to select specific BNSLs based solely on gamma(eff), highlighting the role of entropic forces as a driver for self-assembly.
Medical subject headings
- Cadmium Compounds
- Crystallization
- Models, Chemical
- Nanostructures
- Quantum Dots
- Selenium Compounds
- Semiconductors
- Tellurium