Composite optical waveguide composed of a tapered film of bromothymol blue evaporated onto a potassium ion–exchanged waveguide and its application as a guided wave absorption–based ammonia-gas sensor

2001 ◽  
Vol 26 (9) ◽  
pp. 629 ◽  
Author(s):  
Zhi-mei Qi ◽  
Abliz Yimit ◽  
Kiminori Itoh ◽  
Masayuki Murabayashi ◽  
Naoki Matsuda ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Optical Waveguide ◽  
Bromothymol Blue ◽  
Potassium Ion ◽  
Guided Wave ◽  
Ammonia Gas ◽  
Wave Absorption

PCB-Integrated Optical Waveguide Sensors: An Ammonia Gas Sensor

2013 ◽  
Vol 31 (10) ◽  
pp. 1628-1635 ◽  
Author(s):  
N. Bamiedakis ◽  
T. Hutter ◽  
R. V. Penty ◽  
I. H. White ◽  
S. R. Elliott
Keyword(s):  
Gas Sensor ◽  
Optical Waveguide ◽  
Ammonia Gas ◽  
Integrated Optical ◽  
Waveguide Sensors ◽  
Integrated Optical Waveguide

A Highly Sensitive Ammonia Gas Sensor Based on an Ag+/K+Composite Ion Doped Glass Optical Waveguide System

1996 ◽  
Vol 25 (2) ◽  
pp. 103-104 ◽  
Author(s):  
Xiao-Min Chen ◽  
Kiminori Itoh ◽  
Masayuki Murabayashi ◽  
Chiaki Igarashi
Keyword(s):  
Gas Sensor ◽  
Optical Waveguide ◽  
Ammonia Gas ◽  
Highly Sensitive ◽  
Waveguide System ◽  
Doped Glass

Synthesis of Polyaniline-Zinc Oxide Composites and Its Usage as Ammonia Gas Sensor

2014 ◽  
Vol 1 (4) ◽  
pp. 16-19
Author(s):  
Vivek Talwar ◽  
◽  
Ravi Chand Singh ◽  
Keyword(s):  
Zinc Oxide ◽  
Gas Sensor ◽  
Ammonia Gas ◽  
Oxide Composites

Metal-oxide based ammonia gas sensors: A review

2020 ◽  
Vol 10 ◽  
Author(s):  
Priya Gupta ◽  
Savita Maurya ◽  
Narendra Kumar Pandey ◽  
Vernica Verma
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Review Paper ◽  
Gas Sensing ◽  
Gas Sensitivity ◽  
Ammonia Gas ◽  
Ammonia Sensing ◽  
Ammonia Gas Sensors

: This review paper encompasses a study of metal-oxide and their composite based gas sensors used for the detection of ammonia (NH3) gas. Metal-oxide has come into view as an encouraging choice in the gas sensor industry. This review paper focuses on the ammonia sensing principle of the metal oxides. It also includes various approaches adopted for increasing the gas sensitivity of metal-oxide sensors. Increasing the sensitivity of the ammonia gas sensor includes size effects and doping by metal or other metal oxides which will change the microstructure and morphology of the metal oxides. Different parameters that affect the performances like sensitivity, stability, and selectivity of gas sensors are discussed in this paper. Performances of the most operated metal oxides with strengths and limitations in ammonia gas sensing application are reviewed. The challenges for the development of high sensitive and selective ammonia gas sensor are also discussed.

scholarly journals Ammonia Gas Sensing Characteristic of P3HT-rGO-MWCNT Composite Films

2021 ◽  
Vol 11 (15) ◽  
pp. 6675
Author(s):  
Tran Si Trong Khanh ◽  
Tran Quang Trung ◽  
Le Thuy Thanh Giang ◽  
Tran Quang Nguyen ◽  
Nguyen Dinh Lam ◽  
...  
Keyword(s):  
Response Time ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Composite Films ◽  
Weight Ratio ◽  
Film Surface ◽  
Relative Sensitivity ◽  
Ammonia Gas ◽  
Casting Technique ◽  
Multi Walled Carbon Nanotubes

In this work, the P3HT:rGO:MWCNTs (PGC) nanocomposite film applied to the ammonia gas sensor was successfully fabricated by a drop-casting technique. The results demonstrated that the optimum weight ratio of the PGC nanocomposite gas sensor is 20%:60%:20% as the weight ratio of P3HT:rGO:MWCNTs (called PGC-60). This weight ratio leads to the formation of nanostructured composites, causing the efficient adsorption/desorption of ammonia gas in/out of the film surface. The sensor based on PGC-60 possessed a response time of 30 s, sensitivity up to 3.6% at ammonia gas concentration of 10 ppm, and relative sensitivity of 0.031%/ppm. These results could be attributed to excellent electron transportation of rGO, the main adsorption activator to NH3 gas of P3HT, and holes move from P3HT to the cathodes, which works as charge “nano-bridges” carriers of Multi-Walled Carbon Nanotubes (MWCNTs). In general, these three components of PGC sensors have significantly contributed to the improvement of both the sensitivity and response time in the NH3 gas sensor.

Tungsten Disulphide Nanosheets for High-Performance Chemiresistive Ammonia Gas Sensor

2019 ◽  
Vol 19 (24) ◽  
pp. 11767-11774 ◽  
Author(s):  
Neha Sakhuja ◽  
Ravindra Kumar Jha ◽  
Navakanta Bhat
Keyword(s):  
Gas Sensor ◽  
High Performance ◽  
Ammonia Gas ◽  
Tungsten Disulphide
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