Manipulating near field enhancement and optical spectrum in a pair-array of the cavity resonance based plasmonic nanoantennas

Chau, Yuan-Fong Chou; Jiang, Jhih-Cyuan; Chao, Chung-Ting Chou; Chiang, Hai‐Pang; Lim, Chee Ming

doi:10.1088/0022-3727/49/47/475102

Cited by 47 publications

(15 citation statements)

References 45 publications

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“…According to the surface charge characteristics, the elution time for different micro-plastics staying in resins was different (Figure 3a), and when the ERs were immobilized, the separation effect was enhanced (Figure 3b). PS, with the largest surface charge, stayed in resins for the longest time; on the other hand, PVC stayed in resins for the shortest time because of the smallest surface charge [29,30]. However, regardless of whether the surface charge was high or low, we could not clearly distinguish the five particles of micro-plastics during the detection period.…”

Section: Using Liquid Chromatography To Observe the Interaction Between Micro-plastics And Estrogen Receptorsmentioning

confidence: 77%

“…The "interaction" concept of binding responses detected by SPR is with wide range of analytes including proteins (ligands, receptors, antibodies), nucleotides, small molecules, nanoparticles and even intact live cells. Therefore, SPR application can be further ex-pended to new drug discovery [27][28][29][30][31][32]. Many advantages of SPR in biomedical applications have been reported, such as label-free assay and real-time detection of nano-scale molecular interactions at very low concentrations (~pM) [33].…”

Section: Introductionmentioning

confidence: 99%

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Measurement of Low Concentration of Micro-Plastics by Detection of Bioaffinity-Induced Particle Retention Using Surface Plasmon Resonance Biosensors

et al. 2021

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The issue of micro-plastics is becoming more and more important due to their ubiquity and the harm they cause to the human body. Therefore, evaluating the biological–physical interaction of micro-plastics with health cells has become the focus of many research efforts. This study focuses on the movement mode and low concentration detection development for micro-plastics in surface plasmon resonance (SPR). Firstly, 20-micrometer micro-plastics were prepared by grinding and filtering, and the movement mode was explored; then, the characteristics were investigated by SPR. Chromatographic analysis showed that the surface charge of micro-plastics dominated the elution time, and estrogen receptors (ERs) played a supporting role. A difference of micro-plastics in SPR sensorgram was observed, inferring the micro-plastics’ movement in rolling mode on the ERs. Characteristics analysis indicated that the low particle number of micro-plastics on SPR showed a linear relationship with the response unit (RU). When ERs were immobilized on the biosensor, the force of the binding of micro-plastics to ERs under an ultra-low background was equivalent to the dissociation rate constant shown as follows: PS (0.05 nM) > PVC (0.09 nM) > PE (0.14 nM). The ELISA-like magnetic beads experiment verified the specificity between ERs and micro-plastics. Therefore, by using the SPR technique, a biological-derived over-occupation of PS was found via higher binding force with ERs and longer retention time. In the future, there will be considerable potential for micro-plastics issues, such as identification in natural samples, biomarking, real-time detection in specific environments/regions and human health subject.

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Section: Using Liquid Chromatography To Observe the Interaction Between Micro-plastics And Estrogen Receptorsmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Measurement of Low Concentration of Micro-Plastics by Detection of Bioaffinity-Induced Particle Retention Using Surface Plasmon Resonance Biosensors

et al. 2021

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“…This corresponds to the lower resonant frequency (i.e., larger wavelength). This is why resonance peaks experience red-shifted 66 , 67 . Filling a lower dielectric medium in the core regions reverses the situation.…”

Section: Resultsmentioning

confidence: 99%

A rational design of multimodal asymmetric nanoshells as efficient tunable absorbers within the biological optical window

Souri

Hadilou

Navid

et al. 2021

Sci Rep

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In this work, the optical properties of asymmetric nanoshells with different geometries are comprehensively investigated in the quasi-static regime by applying the dipolar model and effective medium theory. The plasmonic behaviors of these nanostructures are explained by the plasmon hybridization model. Asymmetric hybrid nanoshells, composed of off-center core or nanorod core surrounded by a spherical metallic shell layer possess highly geometrically tunable optical resonances in the near-infrared regime. The plasmon modes of this nanostructures arise from the hybridization of the cavity and solid plasmon modes at the inner and outer surfaces of the shell. The results reveal that the symmetry breaking drastically affects the strength of hybridization between plasmon modes, which ultimately affects the absorption spectrum by altering the number of resonance modes, their wavelengths and absorption efficiencies. Therefore, offsetting the spherical core as well as changing the internal geometry of the nanoparticle to nanorod not only shift the resonance frequencies but can also strongly modify the relative magnitudes of the absorption efficiencies. Furthermore, higher order multipolar plasmon modes can appear in the spectrum of asymmetric nanoshell, especially in nanoegg configuration. The results also indicate that the strength of hybridization strongly depends on the metal of shell, material of core and the filling factor. Using Au-Ag alloy as a material of the shell can provide red-shifted narrow resonance peak in the near-infrared regime by combining the specific features of gold and silver. Moreover, inserting a high permittivity core in a nanoshell corresponds to a red-shift, while a core with small dielectric constant results in a blue-shift of spectrum. We envision that this research offers a novel perspective and provides a practical guideline in the fabrication of efficient tunable absorbers in the nanoscale regime.

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“…This work proposes a graphene SPR sensor for ultra-low-level SARS-CoV-2 detection. SPR plays a pivotal role in the sensing principle of the proposed sensor [ 34 – 36 ]. The proposed sensor is based on the Kretschmann configuration, thus being simple.…”

Section: Introductionmentioning

confidence: 99%

Graphene surface plasmon sensor for ultra-low-level SARS-CoV-2 detection

Talukder

2023

PLoS ONE

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Precisely detecting the ultra-low-level severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is crucial. The detection mechanism must be sensitive, low-cost, portable, fast, and easy to operate to tackle coronavirus disease 19 (COVID-19). This work proposes a sensor exploiting graphene surface plasmon resonance to detect SARS-CoV-2. The graphene layer functionalized with angiotensin-converting enzyme 2 (ACE2) antibodies will help efficient adsorption of the SARS-CoV-2. In addition to the graphene layer, ultra-thin layers of novel two-dimensional materials tungsten disulfide (WS2), potassium niobate (KNbO3), and black phosphorus (BP) or blue phosphorus (BlueP) used in the proposed sensor will increase the light absorption to detect an ultra-low SARS-CoV-2 concentration. The analysis presented in this work shows that the proposed sensor will detect SARS-CoV-2 as small as ∼1 fM. The proposed sensor also offers a minimum sensitivity of 201 degrees/RIU, a figure-of-merit of 140 RIU−1, and enhanced binding kinetics of the SARS-CoV-2 to the sensor surface.

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Manipulating near field enhancement and optical spectrum in a pair-array of the cavity resonance based plasmonic nanoantennas

Cited by 47 publications

References 45 publications

Measurement of Low Concentration of Micro-Plastics by Detection of Bioaffinity-Induced Particle Retention Using Surface Plasmon Resonance Biosensors

Measurement of Low Concentration of Micro-Plastics by Detection of Bioaffinity-Induced Particle Retention Using Surface Plasmon Resonance Biosensors

A rational design of multimodal asymmetric nanoshells as efficient tunable absorbers within the biological optical window

Graphene surface plasmon sensor for ultra-low-level SARS-CoV-2 detection

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