KMITL
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Item type:Publication, Analysis of effects of surface roughness on sensing performance of surface plasmon resonance detection for refractive index sensing application(2021-09-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Performance analysis of non‐interferometry based surface plasmon resonance microscopes(2021-08-01); Pechprasarn, SuejitSurface plasmon microscopy has been of interest to the science and engineering commu-nity and has been utilized in broad aspects of applications and studies, including biochemical sensing and biomolecular binding kinetics. The benefits of surface plasmon microscopy include label‐free detec-tion, high sensitivity, and quantitative measurements. Here, a theoretical framework to analyze and com-pare several non‐interferometric surface plasmon microscopes is proposed. The scope of the study is to (1) identify the strengths and weaknesses in each surface plasmon microscopes reported in the literature; (2) quantify their performance in terms of spatial imaging resolution, imaging contrast, sensitivity, and measurement accuracy for quantitative and non‐quantitative imaging modes of the microscopes. Six types of non‐interferometric microscopes were included in this study: annulus aperture scanning, half annulus aperture scanning, single‐point scanning, double‐point scanning, single‐point scanning, at 45 degrees azimuthal angle, and double‐point scanning at 45 degrees azimuthal angle. For non‐quantitative imaging, there is a substantial tradeoff between the image contrast and the spatial resolution. For the quantitative imaging, the half annulus aperture provided the highest sensitivity of 127.058 rad/μm<sup>2</sup> RIU<sup>−1</sup>, followed by the full annulus aperture of 126.318 rad/μm<sup>2</sup> RIU<sup>−1</sup>. There is a clear tradeoff between spatial resolution and sensitivity. The annulus aperture and half annulus aperture had an optimal resolution, sensitivity, and crosstalk compared to the other non‐interferometric surface plasmon resonance micro-scopes. The resolution depends strongly on the propagation length of the surface plasmons rather than the numerical aperture of the objective lens. For imaging and sensing purposes, the recommended mi-crofluidic channel size and protein stamping size for surface plasmon resonance experiments is at least 25 μm for accurate plasmonic measurements. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Silver thin film and water dielectric SPR sensor experimental and simulation characteristics(2019-01-01); Chittayasothorn, SuphamitThis research project is the study of the Surface Plasmon Resonance (SPR) at the interface between silver thin film and the water dielectric layer. The purpose is to find the suitable thickness of the silver thin film layer which produces SPR and is suitable for SPR sensor applications. Both physical experiments and simulations are conducted using the Kretschmann Configuration. In the physical experiments, BK7 prisms are coated with silver thin films with the thickness of 60Â nm, 80Â nm, and 100Â nm. The light source is p-polarized He-Ne Laser with the wavelength of 632.8Â nm. Hawkeye laser detectors are used to detect the laser light intensity of reflected light for each desired angle. In the simulations, results of SPR signals are analyzed using the finite element method. The simulated results are found to agree with the results from the physical experiments.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optical absorptivity enhancement of SiO2 thin film by Ti and Ag additive(2013-01-01)