Role of higher order plasmonic modes in one-dimensional nanogratings

Sohrabi, Foozieh; Hamidi, Seyedeh Mehri; Mohammadi, Ershad

doi:10.1007/s11082-019-1958-x

Cited by 2 publications

(1 citation statement)

References 34 publications

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“…There are many methods for optical detection, including fluorescence detection, chemiluminescence and bioluminescence detection, Raman spectroscopy, and surface plasmon resonance. 7 Among them, surface plasmon resonance is a proper candidate since it is a non-invasive, label-free and realtime technique for detecting the interaction between cells on the surface interface. 8,9 There are various methods such as spontaneous reasoning, electroporation, or surface functionalization of the micro/nanostructures, which provide the possibility of investigating the intracellular medium.…”

Section: And Other Typesmentioning

confidence: 99%

Detection of Nicotine Effect on Colon Cells in a Plasmonic Platform

et al. 2020

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Introduction: Smoking as one of the causes of various diseases has encouraged worldwide studies on its adverse pharmacological effects on different organs. Nicotine may influence the smooth muscles of the colon and subsequently the gut motility, which leads to a change in the moving rate of digested material through the gastrointestinal tract. Methods: Among various techniques, optical detection methods benefit from non-contact and highsensitivity for studying the early effect of nicotine on the cells. Thus, we used an optically ellipsometric method to get the fast and sensitive nicotine effect on the colon cell. Two-dimensional plasmonic platforms by gold deposition onto the polydimethylsiloxane polymer (PDMS) patterned substrate were used as the guest medium of the cell and the sample was excited by all of the visible region wavelengths at different exposure time and maintenance time. Results: Our results showed that the phase difference between each polarization increased by augmenting the exposure time of smoke over the cell at a fixed maintenance time and there was a general red-shift by increasing the maintenance time at a fixed exposure time. Conclusion: Using different exposure time to cigarette smoke, we optically showed that the cigarette containing the addicting chemical of nicotine had a direct effect on the cultured colon cells on our 2D biocompatible plasmonic chip. It demonstrated considerable changes in the amplitude and phase of the interacted light by injecting nicotine into the system with the aid of the label-free and non-invasive plasmonic technique

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Section: And Other Typesmentioning

confidence: 99%

Detection of Nicotine Effect on Colon Cells in a Plasmonic Platform

et al. 2020

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Biochemical sensing exploiting plasmonic sensors based on gold nanogratings and polymer optical fibers

et al. 2021

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In this work, we present a novel biochemical sensing approach based on a plasmonic sensor chip, combined with a specific receptor, excited and interrogated via a custom 3D-printed holder through a transmission-based experimental setup, exploiting polymer optical fibers. The setup is designed to measure a disposable plasmonic chip based on a gold nanograting fabricated on a polymethylmethacrylate substrate. The examined sensor configurations here presented are simulated, realized, and experimentally tested. More specifically, first, a numerical analysis is carried out by changing several sensor parameters, then an experimental optical characterization of different sensor configurations is reported. Finally, to test the biosensing capabilities of the proposed method, as a proof of concept, we deposit on the best sensor configuration a biomimetic receptor specific for bovine serum albumin detection. The experimental results demonstrate that the proposed sensor shows an ultra-low limit of detection, equal to about 37 pmol/L.

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Role of higher order plasmonic modes in one-dimensional nanogratings

Cited by 2 publications

References 34 publications

Detection of Nicotine Effect on Colon Cells in a Plasmonic Platform

Detection of Nicotine Effect on Colon Cells in a Plasmonic Platform

Biochemical sensing exploiting plasmonic sensors based on gold nanogratings and polymer optical fibers

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