scholarly journals Ultra-High Sensitivity Zinc Oxide Nanocombs for On-Chip Room Temperature Carbon Monoxide Sensing

Sensors ◽  
2015 ◽  
Vol 15 (4) ◽  
pp. 8919-8930 ◽  
Author(s):  
Xiaofang Pan ◽  
Xiaojin Zhao
Keyword(s):  
Carbon Monoxide ◽  
Zinc Oxide ◽  
Room Temperature ◽  
High Sensitivity ◽  
On Chip

High Sensitivity pH Sensors based on Amorphous Indium-gallium-zinc Oxide Thin-film Transistors

2015 ◽  
Vol 135 (6) ◽  
pp. 192-198 ◽  
Author(s):  
Shinnosuke Iwamatsu ◽  
Yutaka Abe ◽  
Toru Yahagi ◽  
Seiya Kobayashi ◽  
Kazushige Takechi ◽  
...  
Keyword(s):  
Thin Film ◽  
Zinc Oxide ◽  
Thin Film Transistors ◽  
High Sensitivity ◽  
Oxide Thin Film ◽  
Indium Gallium Zinc Oxide ◽  
Ph Sensors ◽  
Zinc Oxide Thin Film ◽  
Indium Gallium

UV-assisted High-sensitivity Room-temperature Pd-gated HEMT NO2Gas Sensor

2021 ◽  
Author(s):  
Chong Xing ◽  
Dongcheng Xie ◽  
Haochen Zhang ◽  
Kang Song ◽  
Lei Yang ◽  
...  
Keyword(s):  
Room Temperature ◽  
High Sensitivity

scholarly journals Towards lab-on-chip ultrasensitive ethanol detection using photonic crystal waveguide operating in the mid infrared

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ali Rostamian ◽  
Ehsan Madadi-Kandjani ◽  
Hamed Dalir ◽  
Volker J. Sorger ◽  
Ray T. Chen
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
High Sensitivity ◽  
Guided Wave ◽  
Silicon On Insulator ◽  
Group Index ◽  
Photonic Crystal Waveguide ◽  
Mid Infrared ◽  
Lab On Chip ◽  
On Chip

Abstract Thanks to the unique molecular fingerprints in the mid-infrared spectral region, absorption spectroscopy in this regime has attracted widespread attention in recent years. Contrary to commercially available infrared spectrometers, which are limited by being bulky and cost-intensive, laboratory-on-chip infrared spectrometers can offer sensor advancements including raw sensing performance in addition to use such as enhanced portability. Several platforms have been proposed in the past for on-chip ethanol detection. However, selective sensing with high sensitivity at room temperature has remained a challenge. Here, we experimentally demonstrate an on-chip ethyl alcohol sensor based on a holey photonic crystal waveguide on silicon on insulator-based photonics sensing platform offering an enhanced photoabsorption thus improving sensitivity. This is achieved by designing and engineering an optical slow-light mode with a high group-index of n g  = 73 and a strong localization of modal power in analyte, enabled by the photonic crystal waveguide structure. This approach includes a codesign paradigm that uniquely features an increased effective path length traversed by the guided wave through the to-be-sensed gas analyte. This PIC-based lab-on-chip sensor is exemplary, spectrally designed to operate at the center wavelength of 3.4 μm to match the peak absorbance for ethanol. However, the slow-light enhancement concept is universal offering to cover a wide design-window and spectral ranges towards sensing a plurality of gas species. Using the holey photonic crystal waveguide, we demonstrate the capability of achieving parts per billion levels of gas detection precision. High sensitivity combined with tailorable spectral range along with a compact form-factor enables a new class of portable photonic sensor platforms when combined with integrated with quantum cascade laser and detectors.

scholarly journals Sensing mechanism of an optimized room temperature optical hydrogen gas sensor made of zinc oxide thin films

2020 ◽  
Vol 9 (5) ◽  
pp. 10624-10634
Author(s):  
Siti Nor Aliffah Mustaffa ◽  
Nurul Assikin Ariffin ◽  
Ahmed Lateef Khalaf ◽  
Mohd. Hanif Yaacob ◽  
Nizam Tamchek ◽  
...  
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Gas Sensor ◽  
Room Temperature ◽  
Hydrogen Gas ◽  
Oxide Thin Films ◽  
Sensing Mechanism
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