Quantitative Reconstructions of 3D Chemical Nanostructures in Nanowires.
basic_science · Level V
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- Record sourced from PubMed, PMID 26837636.
- Also identified by DOI 10.1021/acs.nanolett.5b04489.
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Abstract
Energy dispersive X-ray spectrometry is used to extract a quantitative 3D composition profile of heterostructured nanowires. The analysis of hypermaps recorded along a limited number of projections, with a preliminary calibration of the signal associated with each element, is compared to the intensity profiles calculated for a model structure with successive shells of circular, elliptic, or faceted cross sections. This discrete tomographic technique is applied to II-VI nanowires grown by molecular beam epitaxy, incorporating ZnTe and CdTe and their alloys with Mn and Mg, with typical size down to a few nanometers and Mn or Mg content as low as 10%.