FRET controlled photoluminescence in β-In2S3 microflower—Au nanoparticle ensemble. (17th June 2016)

• Record Type: Journal Article
• Authors: Warrier, Anita R; Parameswaran, Chithra; Bingi, Jayachandra; Vijayan, C
• Is Part Of: Materials research express. Volume 3:Number 6(2016)
• Publication Date: 2016-06-17
• Subjects: plasmons -- FRET -- photoluminescence; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/3/6/065016
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: We report on the exciton–plasmon interaction and fluorescence resonance energy transfer controlled photoluminescence quenching and switching in β -In2 S3 microflowers dispersed in Au nanoparticle colloid. The strong resonant interaction of excited β -In2 S3 microflowers with the surface plasmons of Au nanoparticles (∼520 nm) lead to shift in the excitonic binding energy (2.4 eV) with a magnitude of ∼50 meV. In the proximity of Au nanoparticles, the broad emission spectrum of β -In2 S3 microflowers with prominent peak at wavelength of ∼540 nm is quenched and the peak switches to wavelength of ∼600 nm. We demonstrate that the quenching and switching of emission band depends on the rate of fluorescence resonance energy transfer, extent of spectral overlap and β -In2 S3 microflowers (donor)- Au nanoparticles (acceptor) distance. This study opens the wide possibility of fabricating sensors and photonic devices with tunable optical properties.