Fabrication methods of plasmonic and magnetoplasmonic crystals: a review

Sohrabi, Foozieh; Hamidi, Seyedeh Mehri

doi:10.1140/epjp/i2017-11294-2

Cited by 18 publications

(7 citation statements)

References 292 publications

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“…In order to investigate the combinatory effect of SPP and LSP on plasmonic band gap, we used inexpensive and large-scale method of soft lithography to pattern one-dimensional plasmonic crystal [11]. Using this method, 0.6 gr poly (dimethylsiloxane) (PDMS) and 0.06 gr curing agent (Sylgard® 184 silicone elastomer kit) were weighted (10:1 ratio) and mixed.…”

Section: Fabrication Methodsmentioning

confidence: 99%

Adjustable Plasmonic Bandgap in One-Dimensional Nanograting Based on Localized and Propagating Surface Plasmons

Sohrabi

Hamidi

2019

IJOP

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Compared to the long history of plasmonic gratings, there are only a few studies regarding the bandgap in the propagation of plasmonic surface waves. Considering the previous studies on interpretation of plasmonic bandgap formation, we discuss this phenomenon using the effect of both surface plasmon polariton (SPP) and localized surface plasmon (LSP) for our fabricated onedimensional metallic-polymeric grating. This structure is composed of metallic grating on the surface of PDMS with different concentration of embedded gold nanoparticles. By sweeping the incident angles, we have seen that the SPP, LSP and their coupling cause two gaps in reflection regime which are originated from SPP supported by thin film gold film and LSP supported by gold nanoparticles. The first gap is attributed to the patterned metallic film because it vanishes by increasing the nanoparticles which may destroy the pattern while the second gap can be formed by embedded nanoparticles because it becomes more considerable by raising the incubation time. Therefore, the drowning time of patterned samples (e. g. 24h, 48h, and 72h) in HAuCl4 plays the key role in adjustability of plasmonic bandgap. Notably, the interaction between SPP and LSP can be the origin of the shift in gap center from 300 to 550. To best of over knowledge, this study is the first study on the plasmonic band gap as a function of both SPP and LSP.

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Section: Fabrication Methodsmentioning

confidence: 99%

Adjustable Plasmonic Bandgap in One-Dimensional Nanograting Based on Localized and Propagating Surface Plasmons

Sohrabi

Hamidi

2019

IJOP

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“…Plasmonics focuses on the confinement and manipulation of the electromagnetic field of the incident light at the interface of a metal and a dielectric [ 16 , 17 ]. Surface plasmons (SPs) are the coherent electron oscillations at metal and dielectric interface, which decay exponentially with the distance normal to the interface.…”

Section: Plasmonic Biosensingmentioning

confidence: 99%

Role of plasmonics in detection of deadliest viruses: a review

et al. 2021

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Viruses have threatened animal and human lives since a long time ago all over the world. Some of these tiny particles have caused disastrous pandemics that killed a large number of people with subsequent economic downturns. In addition, the quarantine situation itself encounters the challenges like the deficiency in the online educational system, psychiatric problems and poor international relations. Although viruses have a rather simple protein structure, they have structural heterogeneity with a high tendency to mutation that impedes their study. On top of the breadth of such worldwide worrying issues, there are profound scientific gaps, and several unanswered questions, like lack of vaccines or antivirals to combat these pathogens. Various detection techniques like the nucleic acid test, immunoassay, and microscopy have been developed; however, there is a tradeoff between their advantages and disadvantages like safety in sample collecting, invasiveness, sensitivity, response time, etc. One of the highly resolved techniques that can provide early-stage detection with fast experiment duration is plasmonics. This optical technique has the capability to detect viral proteins and genomes at the early stage via highly sensitive interaction between the biological target and the plasmonic chip. The efficiency of this technique could be proved using commercialized techniques like reverse transcription polymerase chain reaction (RT-PCR) and enzyme-linked immunosorbent assay (ELISA) techniques. In this study, we aim to review the role of plasmonic technique in the detection of 11 deadliest viruses besides 2 common genital viruses for the human being. This is a rapidly moving topic of research, and a review article that encompasses the current findings may be useful for guiding strategies to deal with the pandemics . By investigating the potential aspects of this technique, we hope that this study could open new avenues toward the application of point-of-care techniques for virus detection at early stage that may inhibit the progressively hygienic threats.

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“…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. Plasmonic functionalization does not distribute the spontaneous electrical activity and it lets successive recording even during the reasoning process and can distinguish extracellular and intracellular contributions by means of partial cellular reasoning.…”

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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Fabrication methods of plasmonic and magnetoplasmonic crystals: a review

Cited by 18 publications

References 292 publications

Adjustable Plasmonic Bandgap in One-Dimensional Nanograting Based on Localized and Propagating Surface Plasmons

Adjustable Plasmonic Bandgap in One-Dimensional Nanograting Based on Localized and Propagating Surface Plasmons

Role of plasmonics in detection of deadliest viruses: a review

Detection of Nicotine Effect on Colon Cells in a Plasmonic Platform

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