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In this paper, a numerical model of halloysite nano-tubes (HNTs) modified surface plasmon resonance sensor is established and optimized. The simulations investigate the effect of HNTs size parameters on the SPR sensor performance. From this study we can find that the optimal design for halloysite modified SPR sensor.
In this paper, a reduced graphene oxide/maghemite (rGO/ $\gamma{-}\text{Fe}_{2}\text{O}_{3}$) nanocomposite film was used as the sensing layer using surface plasmon resonance (SPR) technique. The fabricated SPR sensor was based on a trilayer structure in which the rGO/ $\gamma{-}\text{Fe}_{2}\text{O}_{3}$ nanocomposite layer was sandwiched between two gold layers. The SPR sensor was tested with...
Retinal-modified SAM-coated nanoslit array thin gold film was used for ultra-sensitive (picomolar) detection of a ligand protein (β-Lactoglobulin) with a transmission SPR mode. The transmission spectra of nanoslit arrays with varying periods were evaluated for nanostructure optimization with respect to primary peak position, shape and sensitivity. Sensitivity of this method, as measured in water,...
We demonstrate increased radiative coupling in periodic arrays of metal nanorods embedded below the substrate surface. The radiative interactions are observed to lead to sharp resonances associated with diffraction.
We aim to develop a molecular-machine-driven nanoplasmonic switch for its use in future nanophotonic integrated circuits (ICs) that have applications in optical communication, information processing, biological and chemical sensing. Experimental data show that an Au nanodisk array, coated with rotaxane molecular machines, switches its localized surface plasmon resonances (LSPR) reversibly when it...
Surfac plasmon sensors use transverse magnetic (TM) polarized waves to probe minor refractive index (RI) changes occurring at an interface between a metal film and a dielectric medium. For optical microscopy, SPR phenomena may be taken advantage of to increase the signal- to-noise ratio so as to benefit to the spatial resolution in imaging applications. This paper presents a demonstration performed...
Simulation work on a novel phase-sensitive surface plasmon resonance sensor based on the extraordinary optical transmission (EOT) is presented. Arrays of nanoholes in a gold film can be used to monitor the binding of organic and biological molecules to the metallic surface. This structure is well suited for dense integration in a sensor chip. Furthermore, the optical geometry is collinear, which simplifies...
Surface Plasmon Resonance (SPR) is a powerful technique for directly sensing in biological studies, chemical detection and environmental pollution monitoring. In this paper, we present polymer optical fiber application in SPR sensors, including wavelength interrogation SPR sensor and surface enhanced Raman scattering (SERS) probe. Polymer optical fiber (POF) is used to effectively couple the incident...
Polarization dependent SPR-based sensing is demonstrated using a biaxial nanohole array. This enables increased spectral diversity and sensitivity with single line excitation. Towards further optofluidic integration, a flow- through array detection scheme is evaluated computationally.
A sensitive biosensor based on localized surface plasmon resonance of gold nanorods is fabricated to detect streptavidin. Gold nanorods are immobilized on glass through BSA-biotin instead of chemisorbed method. The detection limit is 1 muM.
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