AI Article Synopsis
- The study introduces a new growth method for semiconductor nanowires called solid-solid-vapor (SSV) growth, which involves cation exchange during heating.
- As PbSe-CdSe nanodumbbells are heated in a transmission electron microscope (TEM), PbSe nanocrystals grow by consuming CdSe materials as Cd evaporates.
- High-resolution TEM analysis and atomistic simulations suggest that the growth mechanism is facilitated by the presence of vacancies in the materials.
Article Abstract
Here, we show a novel solid-solid-vapor (SSV) growth mechanism whereby epitaxial growth of heterogeneous semiconductor nanowires takes place by evaporation-induced cation exchange. During heating of PbSe-CdSe nanodumbbells inside a transmission electron microscope (TEM), we observed that PbSe nanocrystals grew epitaxially at the expense of CdSe nanodomains driven by evaporation of Cd. Analysis of atomic-resolution TEM observations and detailed atomistic simulations reveals that the growth process is mediated by vacancies.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4055051 | PMC |
| http://dx.doi.org/10.1021/nl501441w | DOI Listing |
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