title: Tunability of the refractive index of gold nanoparticle dispersions.
abstract: 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.
authors.affiliation: Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors.forename: Shoichi
authors.initials: S
authors.lastname: Kubo
authors.forename: Andres
authors.initials: A
authors.lastname: Diaz
authors.forename: Yan
authors.initials: Y
authors.lastname: Tang
authors.forename: Theresa S
authors.initials: TS
authors.lastname: Mayer
authors.forename: Iam Choon
authors.initials: IC
authors.lastname: Khoo
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Mallouk
mesh_terms: 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
chemical_list: D000473:Alkanes; C007548:n-dodecane; D006046:Gold; D012822:Silicon Dioxide