Journal
NANO LETTERS
Volume 8, Issue 8, Pages 2490-2496Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl8015126
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Funding
- National Science Foundation [CHE-9876674]
- Advanced Prototype and Processing Center [AP2C: DARPA HR00011-06-1-0005]
- Office of Naval Research [N000N-05-1-0857]
- Air Force Research Laboratory [FA8650-07-2-5061]
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Colloidal nanorods with linear CdTe/CdSe/CdTe heterojunctions were synthesized by sequential reactant injection. After CdTe deposition at the ends of initially formed CdSe nanorods, continued heating in solution leads to Se-Te interdiffusion across the heterojunctions and coalescence to decreased aspect ratio. The Se-Te interdiffusion rates were measured by mapping the composition profile using nanobeam energy dispersive X-ray spectroscopy (EDS) along the lengths of individual nanorods aged in hot solvent for different amounts of time. The rate of nanorod coalescence was also measured and compared to model predictions using a continuum viscous flow model, which appears to provide a reasonable estimate of the coalescence rate.
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