%0 Journal Article
%A Cortie, Michael B.
%A Liu, Fengguo
%A Arnold, Matthew
D.
%A Niidome, Yasuro
%D 2012
%T Multimode Resonances in
Silver Nanocuboids
%U https://acs.figshare.com/articles/journal_contribution/Multimode_Resonances_in_Silver_Nanocuboids/2512690
%R 10.1021/la300407u.s001
%2 https://ndownloader.figshare.com/files/4155619
%K suspension
%K nanoparticle
%K extinction peaks
%K order plasmon resonances
%K multimode resonances
%K nanorod
%K Anisotropic Silver Shell Formation
%K dipolar
%K Nanorod
%K parallopiped
%X A rich variety of dipolar and higher order plasmon resonances
have
been predicted for nanoscale cubes and parallopipeds of silver, in
contrast to the simple dipolar modes found on silver nanospheres or
nanorods. However, in general, these multimode resonances are not
readily detected in experimental colloidal ensembles, due primarily
to the usual variation of size and shape of the particles obscuring
or blending the individual extinction peaks. Recently, methods have
been found to prepare silver parallopipeds with unprecedented shape
control by nucleating the silver onto a tightly controlled suspension
of gold nanorods (Okuno, Y.; Nishioka, K.; Kiya, A.; Nakashima, N.;
Ishibashi, A.; Niidome, Y. Uniform and Controllable Preparation of
Au-Ag Core-Shell Nanorods Using Anisotropic Silver Shell Formation
on Gold Nanorods. Nanoscale 2010, 2, 1489–1493). The optical extinction spectra of
suspensions of such monodisperse particles are found to contain multiple
extinction peaks, which we show here to be due to the multimode resonances
predicted by theoretical studies. Control of the radius of the nanoparticle
edges is found to be an effective way to turn some of these modes
on or off. These nanoparticles provide a flexible platform for the
excitation, manipulation, and exploration of higher order plasmon
resonances.
%I ACS Publications