Formation of asymmetric one-sided metal-tipped semiconductor nanocrystal dots and rods

Taleb Mokari*, Claudia G. Sztrum, Asaf Salant, Eran Rabani, Uri Banin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

483 Scopus citations

Abstract

The formation of asymmetric one-sided metal-tipped semiconductor nanocrystal dots and rods, was studied. The one-sided growth was found to be preceded by two-sided growth and was observed in different particle shapes. Theoretical modeling in a lattice-gas model and experimental analysis show that a ripening process drives gold from one end to the other, transforming two-sided growth to one-sided growth. It was shown that the ripening on the nanostructure lead to a phase-segregated structure.

Original languageAmerican English
Pages (from-to)855-863
Number of pages9
JournalNature Materials
Volume4
Issue number11
DOIs
StatePublished - Nov 2005

Bibliographical note

Funding Information:
We thank I. Popov from the Center for Nanoscience and Nanotechnology for the HRTEM measurement. We thank A. Willenz from the Electron Microscopy Lab, the Life Sciences Institute, for assistance in TEM measurements. This work was supported in part by the EU under the program SA-NANO and by the US–Israel Binational Science Foundation. T.M. acknowledges support of the Ministry of Science, Israel. Correspondence and requests for materials should be addressed to E.R. or U.B. Supplementary Information accompanies this paper on www.nature.com/naturematerials.

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