title: Core-shell triangular bifrustums.
abstract: Au(core)-Ag(shell) triangular bifrustum nanocrystals were synthesized in aqueous solution using a seed-mediated approach. The formation of the Ag layer on the Au nanoprism seeds leads to structures with highly tunable dipole and quadrupole surface plasmon resonances. Discrete dipole approximation calculations show that it is the geometry of these novel structures rather than the addition of a new element that leads to the plasmon tunability. The structure and composition of these novel nanocrystals have been investigated by transmission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and energy-dispersive spectrometry.
authors: Department of Chemistry and the International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, USA.
authors: Hyojong
authors: H
authors: Yoo
authors: Jill E
authors: JE
authors: Millstone
authors: Shuzhou
authors: S
authors: Li
authors: Jae-Won
authors: JW
authors: Jang
authors: Wei
authors: W
authors: Wei
authors: Jinsong
authors: J
authors: Wu
authors: George C
authors: GC
authors: Schatz
authors: Chad A
authors: CA
authors: Mirkin