Open AccessAluminum Nanocrystals
Author(s) -
Michael J. McClain,
Andrea E. Schlather,
Emilie Ringe,
N. S. P. King,
Lifei Liu,
Alejandro Manjavacas,
Mark W. Knight,
Ish Kumar,
Kenton H. Whitmire,
Henry O. Everitt,
Peter Nordlander,
Naomi J. Halas
Publication year - 2015
Publication title -
nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.853
H-Index - 488
eISSN - 1530-6992
pISSN - 1530-6984
DOI - 10.1021/acs.nanolett.5b00614
Subject(s) - nanocrystal , materials science , dispersity , nanotechnology , chemical engineering , nanoparticle , ultraviolet , plasmon , icosahedral symmetry , oxide , nanoclusters , nanostructure , aluminum oxide , aluminium , optoelectronics , metallurgy , chemistry , crystallography , polymer chemistry , engineering
We demonstrate the facile synthesis of high purity aluminum nanocrystals over a range of controlled sizes from 70 to 220 nm diameter with size control achieved through a simple modification of solvent ratios in the reaction solution. The monodisperse, icosahedral, and trigonal bipyramidal nanocrystals are air-stable for weeks, due to the formation of a 2-4 nm thick passivating oxide layer on their surfaces. We show that the nanocrystals support size-dependent ultraviolet and visible plasmon modes, providing a far more sustainable alternative to gold and silver nanoparticles currently in widespread use.
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