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Systematic investigation of localized surface plasmon resonance of long-range ordered Au nanodisk arrays
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10.1063/1.2828146
/content/aip/journal/jap/103/1/10.1063/1.2828146
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/1/10.1063/1.2828146
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Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic of the nanodisk fabrication process. (b) A SEM image of hexagonal-arranged Au disk arrays on a glass substrate. (c) A histogram of disk diameter distribution obtained with an Able Image Analyzer (Mu Laboratories, Slovenia). The black curve represents results from Gaussian fitting.

Image of FIG. 2.
FIG. 2.

Evolution of mean disk diameter with RIE time. The inset shows typical AFM images of arrays after different etching times.

Image of FIG. 3.
FIG. 3.

(a) Measured extinction spectra of Au disk arrays with different diameters. The inset is a schematic of a unit of arrays. (b) Calculated extinction efficiency as a function of incident light wavelength for Au disks with different diameters. (c) Evolution of peak position of LSPR band as a function of disk diameter. The squares stand for experimental data, the triangles are calculated data for disks in air , and the circles are calculated data for disks in glass . (d) Evolution of FWHM of LSPR band as a function of disk diameter. The squares stand for experimental data, and the circles are calculated data for disks in air.

Image of FIG. 4.
FIG. 4.

(a) Calculated extinction spectra of Au disks with the following three configurations: Au, Au/glass, /glass. (b) Calculated extinction spectra of Au disks with different substrate configures to investigate the overetching effects. The insets show the cross-sectional schematics of the models.

Image of FIG. 5.
FIG. 5.

(a) Calculated extinction efficiency as a function of incident light wavelength for disks of different thickness. (b) Evolution of peak position and FWHM of LSPR band as a function of disk thickness. The inset is a schematic of disks with different thicknesses.

Image of FIG. 6.
FIG. 6.

(a) Extinction spectra of disk arrays before and after annealing. (b) a 3D AFM image of annealed disk arrays. (c) Experimental data on the evolution of LSPR peak position, before and after annealing, as a function of disk diameter. (d) Calculated results on the evolution of LSPR peak position as a function of diameter for both nanodisks and nanospheres.

Image of FIG. 7.
FIG. 7.

(a) Schematic of a plasmofluidic chip. (b) Extinction spectra recorded from the plasmofluidic chip when exposed to different fluids. (c) Calculated extinction efficiency as a function of wavelength for Au disk embedded in media with different refractive indices. (d) Evolution of LSPR peak position as a function of surroundings’ refractive index. The square and circle are for the disks of 140 and in diameter, respectively. The open and solid symbols stand for the experimental and DDA calculated data, respectively. The black lines are from linear fitting of the data.

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/content/aip/journal/jap/103/1/10.1063/1.2828146
2008-01-08
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Systematic investigation of localized surface plasmon resonance of long-range ordered Au nanodisk arrays
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/1/10.1063/1.2828146
10.1063/1.2828146
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