Gain-Assisted Transition Metal Ternary Nitrides (Ti1−xZrxN) Core–Shell Based Sensing of Waterborne Bacteria in Drinking Water

Pathania, Pankaj; Shishodia, Manmohan Singh

doi:10.1007/s11468-019-00927-8

Cited by 13 publications

(4 citation statements)

References 36 publications

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“…According to the wavelength and bandwidth of the spectrum, the Q factor of the sensor is calculated to be 917.12. 19 The experimental system of optical fiber F-P temperature sensor based on metal welding technology is shown in Fig. 4.…”

Section: Methodsmentioning

confidence: 99%

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Optical fiber Fabry-Perot temperature sensor based on metal welding technology

Chen

Wang

2023

J. Nanophoton.

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We present an optical fiber Fabry-Perot (F-P) temperature sensor based on metal welding technology. The fiber sensor is composed of a single-mode fiber and a metal capillary that are encapsulated by metal welding technology. The relationship between the cavity length and sensitivity is analyzed theoretically. The experimental results show that the sensitivity of the fabricated sensor reaches 3.85 nm∕°C when the F-P cavity length is 171 μm. In addition, the sensitivity of the F-P temperature sensor increases as the cavity length of the F-P temperature sensor decreases. The proposed sensor fabricated by metal welding technology has the advantages of a high sensitivity, simple fabrication, simple structure, and low cost.

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Section: Methodsmentioning

confidence: 99%

“…3, the extinction ratio is 3 dB, FSR is 3 nm, and, thus, the sensor cavity length is 400 μm. According to the wavelength and bandwidth of the spectrum, the Q factor of the sensor is calculated to be 917.12 19 …”

Section: Methodsmentioning

confidence: 99%

Optical fiber Fabry-Perot temperature sensor based on metal welding technology

Chen

Wang

2023

J. Nanophoton.

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“…Such structures will provide a better platform for switching, spasing, molecular energy transfer, energy harvesting, bacteria detection, cancer therapy, etc. [5][6][7][8][9][10][11][12][13][14][15][16]. Plasmonic systems are emerging as the backbone of medical diagnostics, e.g., large efforts of physicists, chemists, biologists, and material scientists, are focused on the development of an ultrasensitive plasmonic sensor for bio-molecular sensing.…”

Section: Introductionmentioning

confidence: 99%

“…for existing plasmonic-based devices [35][36][37][38][39][40]. In our previous work, it was examined that the refractory transition metal nitrides (RTMNs) like ZrN and HfN show plasmonic properties similar to the conventional plasmonic material Au [7,8]. Hence, refractory transition metal nitrides (i.e., ZrN, TiN, and HfN) and the ternary alloy (Ti x Zr 1-x N) exhibit attractive plasmonic properties which play a crucial role in designing a better platform for refractive index sensing/detection.…”

Section: Introductionmentioning

confidence: 99%

Fano Resonance-Based Blood Plasma Monitoring and Sensing using Plasmonic Nanomatryoshka

Pathania

Shishodia

2021

Plasmonics

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The fast label-free detection of specific antibodies and their concentration in blood plasma is useful for many applications, e.g., in Covid-19 patients. The change in biophysical properties like the refractive index of blood plasma due to the production of antibodies during infection may be very helpful in estimating the level and intensity of infection and subsequent treatment based on blood plasma therapy. In this article, Fano resonance-based refractive index sensor using plasmonic nanomatryoshka is proposed for blood plasma sensing. The interaction between hybridized modes (bright and dark modes) in optimized nanomatryoshka leads to Fano resonance, which by virtue of steeper dispersion can confine the light more efficiently compared with Lorentzian resonance. We propose the excitation of Fano resonances in sub 100-nm size nanomatryoshka based on newly emerging plasmonic materials ZrN and HfN, and one of the most widely used conventional plasmonic material, Au. Fano resonance-based plasmonic sensors leads to sensitivity = 188.5 nm/RIU, 242.5 nm/RIU, and 244.9 nm/RIU for Au, ZrN, and HfN, respectively. The corresponding figure of merit (nm/RIU) is ~ 3.5 × 10 3 , 3.1 × 10 3 , and 2.8 × 10 3 for Au, ZrN, and HfN, respectively. Present theoretical analysis shows that refractive index sensors with high sensitivity and figure of merit are feasible using Fano modes of plasmonic nanomatryoshka.

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Detection of Serratia marcescens and Mierococcus lysodeikticus Bacterial Cells Using Cerium Oxide/Transition Metal Dichalcogenides Heterostructure‐Based Surface Plasmon Resonance Sensor

Vasimalla,

Singh,

Balaji

et al. 2024

Advanced Photonics Research

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This article explores a novel surface plasmon resonance sensor for detecting the Serratia marcescens and Mierococcus lysodeikticus bacteria cells employing the cerium oxide (CeO2) and transition metal dichalcogenides heterostructure. The proposed sensor is designed based on the Kretschmann configuration, where silver (Ag) is deposited over a prism's surface to excite the surface plasmons. The transfer matrix method and angular interrogation technique are exploited for analyzing the sensor's performance at a wavelength of 633 nm. Firstly, the optimization of the prism and metal film is analyzed by selecting the minimum reflectance, better sensitivity, and quality factor. Secondly, the influence of the proposed structure in the sensor is executed by the performances of different structures, which are made with defined layers. Thirdly, different sensing parameters are analyzed for the considered bacterial cells, resulting in the maximum attained parameters being a sensitivity of 369.40° RIU−1, QF of 151.35 RIU−1, and detection accuracy of 7.57. Finally, the comparative study also shows the noteworthy enhancement using the proposed sensor compared with existing work. Therefore, the proposed sensor can be used as a carrier for detecting the bacterial cells and establishing a new platform for biomolecular and biomedical applications.

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Gain-Assisted Transition Metal Ternary Nitrides (Ti1−xZrxN) Core–Shell Based Sensing of Waterborne Bacteria in Drinking Water

Cited by 13 publications

References 36 publications

Optical fiber Fabry-Perot temperature sensor based on metal welding technology

Optical fiber Fabry-Perot temperature sensor based on metal welding technology

Fano Resonance-Based Blood Plasma Monitoring and Sensing using Plasmonic Nanomatryoshka

Detection of Serratia marcescens and Mierococcus lysodeikticus Bacterial Cells Using Cerium Oxide/Transition Metal Dichalcogenides Heterostructure‐Based Surface Plasmon Resonance Sensor

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