Ag-protein plasmonic architectures for surface plasmon-coupled emission enhancements and Fabry-Perot mode-coupled directional fluorescence emission

Badiya, Pradeep Kumar; Patnaik, Sai Gourang; Srinivasan, Venkatesh; Reddy, Narendra; Manohar, Chelli Sai; Vedarajan, Raman; Mastumi, Noriyoshi; Belliraj, Siva Kumar; Ramamurthy, Sai Sathish

doi:10.1016/j.cplett.2017.07.056

Cited by 16 publications

(28 citation statements)

References 48 publications

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“…Conventional SPCE studies carried out with the use of AgNPs in spacer interface, as presented in the bar diagram of Figure a, yielded a 60-fold emission enhancement. Ramamurthy and co-workers at STAR laboratory have pioneered the work on engineering the radiative decay lifetime of emitter dipoles with a variety of nanohybrids: Ag–CNT, single-layer graphene oxide (SLGO)/Ag, Ag–protein, DNA–metal, Pd–Ag, TiCN, Fe–C–MF, Ag–lignin, to understand their plasmonic and waveguide response in spacer, cavity, and extended-cavity nanointerfaces (presented for comparison in the bar diagram of Figure a). It is to be noted that different templates such as SLGO, CNT, protein, DNA, and palladium have been explored in conjugation with primary plasmonic materials such as silver.…”

Section: Resultsmentioning

confidence: 99%

Bloch Surface Waves and Internal Optical Modes-Driven Photonic Crystal-Coupled Emission Platform for Femtomolar Detection of Aluminum Ions

et al. 2020

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The intrinsically lossy nature of plasmonic-based detection platforms necessitates the use of alternative nanophotonic platforms such as one-dimensional photonic crystals (1DPhCs) to exploit properties pertaining to photonic stop band (PSB), Bloch surface waves (BSWs), microcavity, and band-edge modes. We present a highly desirable confinement of internal optical modes (IOMs) and large surface electromagnetic (EM) field due to BSWs on a plasmon-free, metal template-free, photonic crystal-coupled emission (PCCE) platform ensuing 44-fold emission enhancements of the, otherwise, omnidirectionally emitting radiating dipoles. The effect of dielectric thickness in the PCCE platform has also been explored, and the optimized thicknesses for enhanced coupling of both BSWs and IOMs with the radiating dipoles have been obtained. Cavity engineering involving quantum emitters sandwiched in hot spots between 1DPhCs and Ag nanoparticles (AgNPs) has delivered ∼200-fold emission enhancements on account of the improved local density of states (LDOS) via exceptional EM field trapping by BSWs, IOMs, and localized surface plasmon resonance (LSPR) of plasmonic nanoparticles. Experimental results that are in strong agreement with the numerically calculated data validate this augmentation in enhancements due to the amplified coupling between the radiating dipoles and modes supported by 1DPhCs. Moreover, the tightly entrapped optical energy within the hot spots between AgNPs and 1DPhCs was adopted for sensing environmentally hazardous Al 3+ ions at a 0.21 parts per quadrillion (ppq) limit of detection in drinking water samples with reliable and reproducible results, opening new avenues for investigating distinctive photonic crystal nanoarchitectures as a robust, practical, and user-friendly technology for multiplexed diagnostic fluorescence assays.

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Section: Resultsmentioning

confidence: 99%

Bloch Surface Waves and Internal Optical Modes-Driven Photonic Crystal-Coupled Emission Platform for Femtomolar Detection of Aluminum Ions

et al. 2020

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“…Dissimilar materials1D and 2D carbon substrates, cermet nanocavities, gold-decorated SiO 2 nanohybrids, DNA thin films, and palladium–carbon plasmonic nanocavities in the spacer and cavity configurations has led to interesting advances in plasmonics with wide applications. In this regard, it is to be noted that the use of AgNPs assembled/decorated on different nanotemplates, such as carbon nanotube (CNT), graphene, protein, and low-dimensional carbon, resulted in amplified emission enhancements on the SPCE platform. However, these nanoarchitectures are template-dependent and require advanced tools to differentiate the independent contribution from templates and metal NPs toward the overall EM-field confinement.…”

Section: Introductionmentioning

confidence: 99%

Silver Soret Nanoparticles for Femtomolar Sensing of Glutathione in a Surface Plasmon-Coupled Emission Platform

Bhaskar

Moronshing

Srinivasan

et al. 2020

ACS Appl. Nano Mater.

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Surface plasmon-coupled emission (SPCE) has emerged as an interdisciplinary, versatile sensing platform because of its highly directional, solid-state, and polarized emission. Here, we report the distinct properties rendered by silver Soret colloids (Ag-SCs) such as nanovoids and nanocavities to observe 104-fold enhancement in the emission intensity of omnidirectionally radiating emitter dipoles. Unlike earlier reports utilizing templated silver nanoparticles (AgNPs) in spacer or cavity architectures, here we employ template-free, linker-less Ag-SCs. The Purcell factor (maximum of 120.6) obtained using the finite-difference time-domain simulations for Soret nanocavities is in excellent agreement with the trend in emission enhancements obtained experimentally. The thermal gradient created by adiabatic cooling of AgNPs drives their thermodiffusion, resulting in monodisperse nanoparticle assemblies (Ag-SCs). In addition, we report an extended-cavity architecture with Ag-SCs, as a novel pseudo-metal–dielectric–metal (MDM) interface, for achieving 80-fold SPCE. This study also features the unique properties of Ag-SCs as interfacial nanomaterials on the SPCE platform to achieve femtomolar detection of glutathione (GSH). The quenching of fluorescence from the Alizarin Red S–boric acid (ARS–BA) complex upon the addition of Cu2+ ions and the dequenching upon the GSH addition studied with Ag-SCs as the spacer layer remarkably increased the sensitivity of the analyte. The uniform and intense electromagnetic-field confinement provided by these intricate architectures and hybrid interfaces, along with their ease of fabrication and versatility for a variety of analytes, is critical to achieving augmented SPCE. This is accomplished without compromising the reliability of detection, as demonstrated with the use of a cellphone camera, Commission Internationale de l’Eclairage color space, and luminosity plots for turn-on fluorescence. The emission images were acquired using an android-phone camera by aligning it with its angular emission, making it amenable for point-of-care diagnostics.

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“…The silver nanoparticle is also reported as a powerful plasmonic intermediate in an SPCE-based assay to enhance fluorescence . Thereafter, a silver nanoparticle (AgNP)-decorated protein is developed to improve the fluorescence performance in a polymer-assisted immunoassay. , Moreover, it has been demonstrated that the silver polymer-based SPCE can reach the sensitivity and specificity requirements for analyzing clinical samples. , Besides silver nanoparticles, gold nanoparticles are also adopted in a polymer-based SPCE . Additionally, the nanoparticles with a different morphology, for example, gold nanoparticles (AuNPs, diameter = 20 nm), gold nanorods (AuNRs, length/width = 80/40 nm; 90/30 nm), and gold nanobipyramids (AuNBPs, length/width = 80/40 nm) are reviewed in polymer-based SPCE measurements …”

Section: Practical Application Of Surface Plasmon-assisted Fluorescencementioning

confidence: 99%

“…123 Thereafter, a silver nanoparticle (AgNP)decorated protein is developed to improve the fluorescence performance in a polymer-assisted immunoassay. 124,125 Moreover, it has been demonstrated that the silver polymer-based SPCE can reach the sensitivity and specificity requirements for analyzing clinical samples. 126,127 Besides silver nanoparticles, gold nanoparticles are also adopted in a polymer-based SPCE.…”

Section: Practical Application Of Surface Plasmon-assisted Fluorescencementioning

confidence: 99%

Surface Plasmon-Assisted Fluorescence Enhancing and Quenching: From Theory to Application

Jiang

Gou

et al. 2021

ACS Appl. Bio Mater.

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The integration of surface plasmon resonance and fluorescence yields a multiaspect improvement in surface fluorescence sensing and imaging, leading to a paradigm shift of surface plasmonassisted fluorescence techniques, for example, surface plasmon enhanced field fluorescence spectroscopy, surface plasmon coupled emission (SPCE), and SPCE imaging. This Review aims to characterize the unique optical property with a common physical interpretation and diverse surface architecture-based measurements. The fundamental electromagnetic theory is employed to comprehensively unveil the fluorophore−surface plasmon interaction, and the associated surfacemodification design is liberally highlighted to balance the surface plasmon-induced fluorescence-enhancement efforts and the surface plasmon-caused fluorescence-quenching effects. In particular, all types of surface structures, for example, silicon, carbon, protein, DNA, polymer, and multilayer, are systematically interrogated in terms of component, thickness, stiffness, and functionality. As a highly interdisciplinary and expanding field in physics, optics, chemistry, and surface chemistry, this Review could be of great interest to a broad readership, in particular, among physical chemists, analytical chemists, and in surface-based sensing and imaging studies.

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Ag-protein plasmonic architectures for surface plasmon-coupled emission enhancements and Fabry-Perot mode-coupled directional fluorescence emission

Cited by 16 publications

References 48 publications

Bloch Surface Waves and Internal Optical Modes-Driven Photonic Crystal-Coupled Emission Platform for Femtomolar Detection of Aluminum Ions

Bloch Surface Waves and Internal Optical Modes-Driven Photonic Crystal-Coupled Emission Platform for Femtomolar Detection of Aluminum Ions

Silver Soret Nanoparticles for Femtomolar Sensing of Glutathione in a Surface Plasmon-Coupled Emission Platform

Surface Plasmon-Assisted Fluorescence Enhancing and Quenching: From Theory to Application

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