Coalescence and Interface Diffusion in Linear CdTe/CdSe/CdTe Heterojunction Nanorods
Bonil Koo
Brian A. Korgel
10.1021/nl8015126.s001
https://acs.figshare.com/articles/journal_contribution/Coalescence_and_Interface_Diffusion_in_Linear_CdTe_CdSe_CdTe_Heterojunction_Nanorods/2921710
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.
2008-08-13 00:00:00
composition profile
nanorod coalescence
CdSe nanorods
heterojunction
sequential reactant injection
CdTe deposition
EDS
coalescence rate
aspect ratio
model predictions
Interface Diffusion
flow model
interdiffusion