Tunability of the refractive index of gold nanoparticle dispersions.
Alkanethiol-capped gold nanoparticles dispersed in n-dodecane were studied by spectroscopic ellipsometry and were modeled using Mie scattering theory. The refractive index in the visible and near-infrared depended on the volume fraction of gold nanoparticles, in good agreement with the theoretical expectation that such dispersed plasmonic nanoparticles can act as low or tunable refractive index materials at specific optical wavelengths.
Kubo
Shoichi
S
Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Diaz
Andres
A
Tang
Yan
Y
Mayer
Theresa S
TS
Khoo
Iam Choon
IC
Mallouk
Thomas E
TE
D000473:Alkanes / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods; D004583:Electrons; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D015233:Models, Statistical; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D012031:Refractometry; D012822:Silicon Dioxide / Q000737:chemistry; D013053:Spectrophotometry
D000473:Alkanes; C007548:n-dodecane; D006046:Gold; D012822:Silicon Dioxide