skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Shaping metal nanocrystals through epitaxial seeded growth

Abstract

Morphological control of nanocrystals has becomeincreasingly important, as many of their physical and chemical propertiesare highly shape-dependent. Nanocrystal shape control for both single andmultiple material systems, however, remains fairly empirical andchallenging. New methods need to be explored for the rational syntheticdesign of heterostructures with controlled morphology. Overgrowth of adifferent material on well-faceted seeds, for example, allows for the useof the defined seed morphology to control nucleation and growth of thesecondary structure. Here, we have used highly faceted cubic Pt seeds todirect the epitaxial overgrowth of a secondary metal. We demonstrate thisconcept with lattice matched Pd to produce conformal shape-controlledcore-shell particles, and then extend it to lattice mismatched Au to giveanisotropic growth. Seeding with faceted nanocrystals may havesignificant potential towards the development of shape-controlledheterostructures with defined interfaces.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE Director. Office of Science. Basic EnergySciences
OSTI Identifier:
926908
Report Number(s):
LBNL-63800
R&D Project: 508435; BnR: KC0203010
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Nature Materials
Additional Journal Information:
Journal Volume: 6; Related Information: Journal Publication Date: 09/2007
Country of Publication:
United States
Language:
English
Subject:
36; nanocrystal metal

Citation Formats

Habas, Susan E, Lee, Hyunjoo, Radmilovic, Velimir, Somorjai, Gabor A, and Yang, Peidong. Shaping metal nanocrystals through epitaxial seeded growth. United States: N. p., 2008. Web.
Habas, Susan E, Lee, Hyunjoo, Radmilovic, Velimir, Somorjai, Gabor A, & Yang, Peidong. Shaping metal nanocrystals through epitaxial seeded growth. United States.
Habas, Susan E, Lee, Hyunjoo, Radmilovic, Velimir, Somorjai, Gabor A, and Yang, Peidong. Sun . "Shaping metal nanocrystals through epitaxial seeded growth". United States. https://www.osti.gov/servlets/purl/926908.
@article{osti_926908,
title = {Shaping metal nanocrystals through epitaxial seeded growth},
author = {Habas, Susan E and Lee, Hyunjoo and Radmilovic, Velimir and Somorjai, Gabor A and Yang, Peidong},
abstractNote = {Morphological control of nanocrystals has becomeincreasingly important, as many of their physical and chemical propertiesare highly shape-dependent. Nanocrystal shape control for both single andmultiple material systems, however, remains fairly empirical andchallenging. New methods need to be explored for the rational syntheticdesign of heterostructures with controlled morphology. Overgrowth of adifferent material on well-faceted seeds, for example, allows for the useof the defined seed morphology to control nucleation and growth of thesecondary structure. Here, we have used highly faceted cubic Pt seeds todirect the epitaxial overgrowth of a secondary metal. We demonstrate thisconcept with lattice matched Pd to produce conformal shape-controlledcore-shell particles, and then extend it to lattice mismatched Au to giveanisotropic growth. Seeding with faceted nanocrystals may havesignificant potential towards the development of shape-controlledheterostructures with defined interfaces.},
doi = {},
journal = {Nature Materials},
number = ,
volume = 6,
place = {United States},
year = {2008},
month = {2}
}