title: Tunable infrared absorption and visible transparency of colloidal aluminum-doped zinc oxide nanocrystals.
abstract: Plasmonic nanocrystals have been attracting a lot of attention both for fundamental studies and different applications, from sensing to imaging and optoelectronic devices. Transparent conductive oxides represent an interesting class of plasmonic materials in addition to metals and vacancy-doped semiconductor quantum dots. Herein, we report a rational synthetic strategy of high-quality colloidal aluminum-doped zinc oxide nanocrystals. The presence of substitutional aluminum in the zinc oxide lattice accompanied by the generation of free electrons is proved for the first time by tunable surface plasmon absorption in the infrared region both in solution and in thin films.
authors.affiliation: The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 67R4110, Berkeley, California 94720, United States.
authors.forename: Raffaella
authors.initials: R
authors.lastname: Buonsanti
authors.forename: Anna
authors.initials: A
authors.lastname: Llordes
authors.forename: Shaul
authors.initials: S
authors.lastname: Aloni
authors.forename: Brett A
authors.initials: BA
authors.lastname: Helms
authors.forename: Delia J
authors.initials: DJ
authors.lastname: Milliron
mesh_terms: D000042:Absorption; D000535:Aluminum / Q000737:chemistry*; D003102:Colloids / Q000737:chemistry; D007259:Infrared Rays; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012031:Refractometry; D012542:Scattering, Radiation; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D003102:Colloids; D000535:Aluminum; D015034:Zinc Oxide