title: Ultraviolet nanoplasmonics: a demonstration of surface-enhanced Raman spectroscopy, fluorescence, and photodegradation using gallium nanoparticles.
abstract: Self-assembled arrays of hemispherical gallium nanoparticles deposited by molecular beam epitaxy on a sapphire support are explored as a new type of substrate for ultraviolet plasmonics. Spin-casting a 5 nm film of crystal violet upon these nanoparticles permitted the demonstration of surface-enhanced Raman spectra, fluorescence, and degradation following excitation by a HeCd laser operating at 325 nm. Measured local Raman enhancement factors exceeding 10(7) demonstrate the potential of gallium nanoparticle arrays for plasmonically enhanced ultraviolet detection and remediation.
authors: Department of Physics, Duke University, Durham, North Carolina 27708, USA.
authors: Yang
authors: Y
authors: Yang
authors: John M
authors: JM
authors: Callahan
authors: Tong-Ho
authors: TH
authors: Kim
authors: April S
authors: AS
authors: Brown
authors: Henry O
authors: HO
authors: Everitt