Far- and deep-ultraviolet surface plasmon resonance sensors working in aqueous solutions using aluminum thin films

Tanabe, Ichiro; Tanaka, Yoshito; Hanulia, Taras; Goto, Takeyoshi; Inami, Wataru; Kawata, Yoshimasa; Ozaki, Yukihiro

doi:10.1038/s41598-017-06403-9

Cited by 43 publications

(18 citation statements)

References 28 publications

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“…When a material has no absorbance, its dielectric constant corresponds to the square of its refractive index n . The changes of the value of ϵ s also have effects on the the dispersion relations; ω in the surface plasmon dispersion relation becomes smaller by increasing the value of ϵ s …”

Section: Al‐spr Properties On a Sapphire Prismmentioning

confidence: 99%

Far‐ and Deep‐Ultraviolet Surface Plasmon Resonance Sensor

Tanabe

Tanaka

2018

The Chemical Record

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Plasmonics in the UV region has been widely focused because of the higher energy and the abundant electronic resonances compared to the conventional visible plasmonics. Recently, we have investigated the surface plasmon resonance (SPR) properties of the Al film, aiming for the application as refractive index sensors. Utilizing the UV lights, we expect three advantages: high sensitivity, material selectivity, and surface selectivity. By using an original attenuated total reflectance spectroscopic instrument, Al-SPR angle and wavelength were investigated with changing environments on the Al film. Al film thickness and materials of prisms on which Al was evaporated were also important factors for the SPR properties. By optimizing the conditions, the Al film worked as a sensor both in air and in liquids. In addition, our established system expands the plasmonics into an even higher energy region than 200 nm, while the UV-plasmonics have been studied in the wavelength region longer than 200 nm.

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Section: Al‐spr Properties On a Sapphire Prismmentioning

confidence: 99%

Far‐ and Deep‐Ultraviolet Surface Plasmon Resonance Sensor

Tanabe

Tanaka

2018

The Chemical Record

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“…The results showed that the refractive indices of carboxyl-MoS 2 in the larger-wavelength region were smaller than those in the short-wavelength region, which resulted in small shifts of the measured SPR angle (whereas a shorter incident wavelength will result in a larger SPR angle). This phenomenon is due to the refractive index (n) and extinction coefficient (k) of the material resulting in different SPP dispersion characteristics of the absorbed wave in different wavelength regions (Tanabe et al, 2017;Kuai et al, 2019). Figure 3D shows the UV-visible absorption spectrum of measured and calculated values for carboxyl-MoS 2 dispersion in water.…”

Section: Analysis Of Coupling Effect Of the Spr Mode In Carboxyl-mos mentioning

confidence: 99%

High-Sensitivity Detection of the Lung Cancer Biomarker CYFRA21-1 in Serum Samples Using a Carboxyl-MoS2 Functional Film for SPR-Based Immunosensors

Chiu

Yang

2020

Front. Bioeng. Biotechnol.

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We constructed a novel surface plasmon resonance (SPR) detection assay using carboxyl-functionalized molybdenum disulfide (carboxyl-MoS 2) nanocomposites as a signal amplification sensing film for the ultrasensitive detection of the lung cancer-associated biomarker cytokeratin 19 fragment (CYFRA21-1). The experiment succeeded in MoS 2 reacted with chloroacetic acid giving carboxyl-MoS 2 as the reaction product. The additional shoulder in the C 1s and O 1s peaks of carboxyl-MoS 2 , which were increased in X-ray photoelectron spectroscopy, confirmed the presence of O-C=O groups on the surface of the carboxyl-MoS 2. Compared to MoS 2 , the experimental results confirmed that carboxyl-modified MoS 2 had improved low impedance and low refractive index. The carboxyl-MoS 2-based chip had a high affinity, with an SPR angle shift enhanced by 2.6-fold and affinity binding K A enhanced by 15-fold compared to a traditional SPR sensor. The results revealed that the carboxyl-MoS 2-based chip had high sensitivity, specificity, and SPR signal affinity, while the CYFRA21-1 assay in spiked clinical serum showed a lower detection limit of 0.05 pg/mL and a wider quantitation range (0.05 pg/mL to 100 ng/mL). The carboxyl-MoS 2-based chip detection value was about 10 4 times more sensitive than the limit of detection of an enzyme-linked immunosorbent assay (ELISA) (0.60 ng/mL). The results showed that the carboxyl-MoS 2-based chip had the potential to rapidly assay complex samples including bodily fluids, whole blood, serum, plasma, urine, and saliva in SPR-based immunosensors to diagnose diseases including cancer.

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“…Surface plasmons were also used surface plasmon sensor that detects refractive index changes of the medium in the vicinity of metal. DUV plasmonic sensors using Al and In were developed for sensing molecules with different refractive indices. Since molecules show large refractive indices in the DUV range due to the intrinsic molecular absorption, detection sensitivity is high for DUV plasmon sensors compared to visible ones.…”

Section: Duv Plasmon‐enhanced Molecular Sensing and Imagingmentioning

confidence: 99%

Deep‐Ultraviolet Biomolecular Imaging and Analysis

Kumamoto

Taguchi

Kawata

2018

Advanced Optical Materials

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Deep‐ultraviolet light, 200–300 nm in wavelength, interacts with nucleic acids and proteins strongly compared to visible and infrared light. In this article, the interaction between deep‐ultraviolet photons and biomolecules is discussed. Especially, the absorption and autofluorescence of biomolecules by the deep‐ultraviolet excitation are examined. Applications of deep‐ultraviolet absorption and autofluorescence to label‐free biomolecular imaging and analysis of cells and tissues are shown. Resonant Raman scattering at nucleotide bases and aromatic amino acids as another important topic of deep‐ultraviolet photonics is reviewed in biomolecular imaging and analysis. The discussion extends to the recent progress in the development of deep‐ultraviolet microscopes as well as a variety of deep‐ultraviolet optical devices such as light sources, detectors, and objectives. The issue of photodamage due to deep‐ultraviolet irradiation on cells and tissues is also discussed. It has been recently suppressed with use of lanthanide ions. The experimental results of the photodamage suppression are shown. For surface‐enhanced resonant Raman scattering, autofluorescence enhancement, and tip‐enhanced resonant Raman scattering microscopy, plasmonic materials applicable in the deep‐ultraviolet range are discussed.

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Far- and deep-ultraviolet surface plasmon resonance sensors working in aqueous solutions using aluminum thin films

Cited by 43 publications

References 28 publications

Far‐ and Deep‐Ultraviolet Surface Plasmon Resonance Sensor

Far‐ and Deep‐Ultraviolet Surface Plasmon Resonance Sensor

High-Sensitivity Detection of the Lung Cancer Biomarker CYFRA21-1 in Serum Samples Using a Carboxyl-MoS2 Functional Film for SPR-Based Immunosensors

Deep‐Ultraviolet Biomolecular Imaging and Analysis

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