Multipole plasmon resonances in gold nanorods.
The optical properties of gold rods electrochemically deposited in anodic aluminum oxide templates have been investigated. Homogeneous suspensions of rods with an average diameter of 85 nm and varying lengths of 96, 186, 321, 465, 495, 578, 641, 735, and 1175 nm were fabricated. The purity and dimensions of these rod nanostructures allowed us to observe higher-order multipole resonances for the first time in a colloidal suspension. The experimental optical spectra agree with discrete dipole approximation calculations that have been modeled from the dimensions of the gold nanorods.
Payne
Emma Kathryn
EK
Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA.
Shuford
Kevin L
KL
Park
Sungho
S
Schatz
George C
GC
Mirkin
Chad A
CA
D000537:Aluminum Oxide / Q000737:chemistry; D003102:Colloids / Q000737:chemistry; D004563:Electrochemistry; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D020349:Surface Plasmon Resonance / Q000379:methods; D013499:Surface Properties; D013816:Thermodynamics
D003102:Colloids; D006046:Gold; D000537:Aluminum Oxide