Plasmonic Metal-Hybrid Hydrogen Sensor Based on Semiconductor Nanocrystal Micro Ring

MRS Advances ◽  
2017 ◽  
Vol 3 (14) ◽  
pp. 717-723
Author(s):  
Da Chuan Wu ◽  
Wei Guo ◽  
Poonam Birar ◽  
Ya Sha Yi
Keyword(s):  
Fuel Economy ◽  
Evanescent Wave ◽  
Ring Resonator ◽  
Hydrogen Sensor ◽  
Hydrogen Fuel ◽  
Sensitive Layer ◽  
Semiconductor Nanocrystal ◽  
Highly Sensitive ◽  
Platinum Layer ◽  
Palladium Platinum

ABSTRACTWe have proposed and demonstrated numerically an ultra-small (4×4μm2) hydrogen sensor based on micro ring resonator. With a palladium or platinum layer coated on the inner surface of the micro ring resonator, the device is highly sensitive to the low hydrogen concentration variation and the sensitivity is at least one magnitude order larger than the optical fiber-based hydrogen sensor. We have also investigated the tradeoff between the portion coverage of palladium/platinum layer and the sensitivity. The width of the hydrogen sensitive layer is also studied and the minimum feature width is determined to be the length of the ring waveguide evanescent wave. This ultra-small optical hydrogen sensor will be promising to realize highly compact sensor with integration capability for applications on hydrogen fuel economy.

Functionality of Surface Acoustic Wave (SAW) transducer for palladium–platinum-based hydrogen sensor

2016 ◽  
Vol 251 ◽  
pp. 35-41 ◽  
Author(s):  
L. Perez-Cortes ◽  
C. Hernandez-Rodriguez ◽  
T. Mazingue ◽  
M. Lomello-Tafin
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Hydrogen Sensor ◽  
Palladium Platinum

An evanescent wave multi-channel immunosensor system for the highly sensitive detection of small analytes in water samples

2014 ◽  
Vol 198 ◽  
pp. 150-156 ◽  
Author(s):  
Zhou Xiao-hong ◽  
Song Bao-dong ◽  
Shi Han-chang ◽  
Liu Lan-hua ◽  
Guo Hong-li ◽  
...  
Keyword(s):  
Water Samples ◽  
Evanescent Wave ◽  
Sensitive Detection ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

Fuel economy of hydrogen fuel cell vehicles

2005 ◽  
pp. 531-543 ◽  
Author(s):  
Rajesh K. Ahluwalia ◽  
X. Wang ◽  
A. Rousseau ◽  
R. Kumar
Keyword(s):  
Fuel Cell ◽  
Fuel Economy ◽  
Fuel Cell Vehicles ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
Hydrogen Fuel Cell Vehicles

Highly sensitive bio sensor based on WGM ring resonator for hemoglobin detection in blood samples

Optik ◽  
2021 ◽  
Vol 226 ◽  
pp. 166009
Author(s):  
Abul Kalam Ajad ◽  
Md Jahirul Islam ◽  
Md Rejvi Kaysir ◽  
Javid Atai
Keyword(s):  
Ring Resonator ◽  
Blood Samples ◽  
Highly Sensitive

scholarly journals Subwavelength Grating Double Slot Waveguide Racetrack Ring Resonator for Refractive Index Sensing Application

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3416 ◽  
Author(s):  
Nikolay Lvovich Kazanskiy ◽  
Svetlana Nikolaevna Khonina ◽  
Muhammad Ali Butt
Keyword(s):  
Ring Resonator ◽  
Numerical Study ◽  
Slot Waveguide ◽  
Lab On Chip ◽  
Subwavelength Grating ◽  
Resonator Design ◽  
Highly Sensitive ◽  
Light Matter Interaction ◽  
On Chip ◽  
The One

In this paper, a racetrack ring resonator design based on a subwavelength grating double slot waveguide is presented. The proposed waveguide scheme is capable of confining the transverse electric field in the slots and the gaps between the grating segments. This configuration facilitates a large light–matter interaction which elevates the sensitivity of the device approximately 2.5 times higher than the one that can be obtained via a standard slot waveguide resonator. The best sensitivity of the design is obtained at 1000 nm/RIU by utilizing a subwavelength grating double slot waveguide of period 300 nm. The numerical study is conducted via 2D and 3D finite element methods. We believe that the proposed sensor design can play an important role in the realization of highly sensitive lab-on-chip sensors.

scholarly journals The Role of ALD-ZnO Seed Layers in the Growth of ZnO Nanorods for Hydrogen Sensing

Micromachines ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 491 ◽  
Author(s):  
Yangming Lu ◽  
Chiafen Hsieh ◽  
Guanci Su
Keyword(s):  
Zinc Oxide ◽  
Surface Area ◽  
Gas Sensing ◽  
Zno Nanorods ◽  
Clean Energy ◽  
Hydrogen Sensor ◽  
Zno Films ◽  
Hydrogen Sensing ◽  
Highly Sensitive ◽  
Seed Layers

Hydrogen is one of the most important clean energy sources of the future. Because of its flammability, explosiveness, and flammability, it is important to develop a highly sensitive hydrogen sensor. Among many gas sensing materials, zinc oxide has excellent sensing properties and is therefore attracting attention. Effectively reducing the resistance of sensing materials and increasing the surface area of materials is an important issue to increase the sensitivity of gas sensing. Zinc oxide seed layers were prepared by atomic layer deposition (ALD) to facilitate the subsequent hydrothermal growth of ZnO nanorods. The nanorods are used as highly sensitive materials for sensing hydrogen due to their inherent properties as oxide semiconductors and their very high surface areas. The low resistance value of ALD-ZnO helps to transport electrons when sensing hydrogen gas and improves the sensitivity of hydrogen sensors. The large surface area of ZnO nanorods also provides lots of sites of gas adsorption which also increases the sensitivity of the hydrogen sensor. Our experimental results show that perfect crystallinity helped to reduce the electrical resistance of ALD-ZnO films. High areal nucleation density and sufficient inter-rod space were determining factors for efficient hydrogen sensing. The sensitivity increased with increasing hydrogen temperature, from 1.03 at 225 °C, to 1.32 at 380 °C after sensing 100 s in 10,000 ppm of hydrogen. We discuss in detail the properties of electrical conductivity, point defects, and crystal quality of ALD-ZnO films and their probable effects on the sensitivity of hydrogen sensing.

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