Fluorescence Enhancement on Large Area Self‐Assembled Plasmonic‐3D Photonic Crystals. Issue 9 (5th January 2017)

• Record Type: Journal Article
• Authors: Chen, Guojian; Wang, Dongzhu; Hong, Wei; Sun, Lu; Zhu, Yongxiang; Chen, Xudong
• Is Part Of: Small. Volume 13:Issue 9(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-01-05
• Subjects: fluorescence enhancement -- hybrid structures -- localized surface plasmon resonance -- photonic crystals; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201602612
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract : Discontinuous plasmonic‐3D photonic crystal hybrid structures are fabricated in order to evaluate the coupling effect of surface plasmon resonance and the photonic stop band. The nanostructures are prepared by silver sputtering deposition on top of hydrophobic 3D photonic crystals. The localized surface plasmon resonance of the nanostructure has a symbiotic relationship with the 3D photonic stop band, leading to highly tunable characteristics. Fluorescence enhancements of conjugated polymer and quantum dot based on these hybrid structures are studied. The maximum fluorescence enhancement for the conjugated polymer of poly(5‐methoxy‐2‐(3‐sulfopropoxy)‐1, 4‐phenylenevinylene) potassium salt by a factor of 87 is achieved as compared with that on a glass substrate due to the enhanced near‐field from the discontinuous plasmonic structures, strong scattering effects from rough metal surface with photonic stop band, and accelerated decay rates from metal‐coupled excited state of the fluorophore. It is demonstrated that the enhancement induced by the hybrid structures has a larger effective distance (optimum thickness ≈130 nm) than conventional plasmonic systems. It is expected that this approach has tremendous potential in the field of sensors, fluorescence‐imaging, and optoelectronic applications. Abstract : Plasmonic‐3D photonic crystals are synthesized by silver sputtering deposition on top of hydrophobic 3D photonic crystals and exhibit strong localized surface plasmon resonance induced by 3D photonic stop band. Such large area hybrid structures present nearly two orders of fluorescence enhancement with a wide range of effective distance, providing numerous possibilities for "photon management" applications.