NDLI: Dark-field microscopy studies of polarization-dependent plasmonic resonance of single gold nanorods: rainbow nanoparticles

Content Provider	Royal Society of Chemistry (RSC)
Author	Huang, Youju Kim, Dong-Hwan
Copyright Year	2011
Abstract	Orientation sensors require the monitoring of polarization-dependent surface plasmons of single nanoparticles. Herein, we present both the longitudinal and transverse surface plasmonic resonance from a single gold nanorod (AuNR) using conventional dark-field microscopy. The relative peak intensities of the transverse and longitudinal surface plasmons of a single AuNR can be successfully tuned by polarized excitation, which is an important step towards the use of transverse plasmon resonance of single AuNRs without photo-induced reshaping of nanoparticles. More interestingly, compared with AuNRs with small diameters, unique optical properties from AuNRs with diameters greater than 30 nm are revealed. As a result, optical images with different colors, rainbow nanoparticles (sea green, brown, red, yellow and green), depending on the polarization angle, can be revealed by a single AuNR. This result holds great promise for polarization-controlled colorimetric nanomaterials and single particle tracers in living cells and microfluidic flows.
Starting Page	3228
Ending Page	3232
Page Count	5
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	3
Issue Number	8
Journal	Nanoscale
DOI	10.1039/c1nr10336a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Dark field microscopy Nanomaterials Resonance Surface plasmon resonance
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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