Dopant Mediated Surface Charge Imbalance in Enhancing Performance of Metal Oxide Chemiresistive Gas Sensors

2022 ◽  
Author(s):  
Nirman Chakraborty ◽  
Swastik Mondal
Keyword(s):  
Metal Oxide ◽  
Surface Charge ◽  
Gas Sensors ◽  
Charge Imbalance ◽  
Efficient Strategy ◽  
Sensitivity And Selectivity ◽  
Chemiresistive Gas Sensors

Chemically pristine and untailored metal oxide based gas sensors usually suffer the brunt of poor sensitivity and selectivity. Doping with suitable element has been an efficient strategy to encounter above...

scholarly journals SPM—SEM Investigations of Semiconductor Nanowires for Integrated Metal Oxide Gas Sensors

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 701 ◽  
Author(s):  
Verena Leitgeb ◽  
Katrin Fladischer ◽  
Frank Hitzel ◽  
Florentyna Sosada-Ludwikowska ◽  
Johanna Krainer ◽  
...  
Keyword(s):  
Electron Beam ◽  
Metal Oxide ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Semiconductor Nanowires ◽  
Kelvin Probe ◽  
Sensor Applications ◽  
Sensitivity And Selectivity ◽  
Stable Performance ◽  
Metal Oxide Gas Sensors

Integration of metal oxide nanowires in metal oxide gas sensors enables a new generation of gas sensor devices, with increased sensitivity and selectivity. For reproducible and stable performance of next generation sensors, the electric properties of integrated nanowires have to be well understood, since the detection principle of metal oxide gas sensors is based on the change in electrical conductivity during gas exposure. We study two different types of nanowires that show promising properties for gas sensor applications with a Scanning Probe Microscope—Scanning Electron Microscope combination. Electron Beam Induced Current and Kelvin Probe Force Microscopy measurements with a lateral resolution in the nanometer regime are performed. Our work offers new insights into the dependence of the nanowire work function on its composition and size, and into the local interaction between electron beam and semiconductor nanowires.

Nanoparticle Design and Assembly for p-type Metal Oxide Gas Sensors

Nanoscale ◽  
2022 ◽  
Author(s):  
Byeonghoon Choi ◽  
Dongwoo Shin ◽  
Hee-Seung Lee ◽  
Hyunjoon Song
Keyword(s):  
Metal Oxide ◽  
Gas Sensors ◽  
High Stability ◽  
Wide Band ◽  
Band Gaps ◽  
Oxide Semiconductors ◽  
Nanoparticle Design ◽  
Metal Oxide Gas Sensors ◽  
Chemiresistive Gas Sensors ◽  
P Type

Metal oxide semiconductors have wide band gaps with tailorable electrical properties and high stability, suitable for chemiresistive gas sensors. p-Type oxide semiconductors generally have less sensitivity than n-type counterparts but...

Chemiresistive gas sensors employing solution-processed metal oxide quantum dot films

2014 ◽  
Vol 105 (16) ◽  
pp. 163104 ◽  
Author(s):  
Huan Liu ◽  
Songman Xu ◽  
Min Li ◽  
Gang Shao ◽  
Huaibing Song ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Metal Oxide ◽  
Gas Sensors ◽  
Solution Processed ◽  
Chemiresistive Gas Sensors

Metal Oxide/CNT/Graphene Nanostructures for Chemiresistive Gas Sensors

2020 ◽  
pp. 163-194
Author(s):  
Sanju Rani ◽  
Manoj Kumar ◽  
Yogesh Singh ◽  
Rahul Kumar ◽  
V.N. Singh
Keyword(s):  
Metal Oxide ◽  
Gas Sensors ◽  
Chemiresistive Gas Sensors ◽  
Graphene Nanostructures

Metal oxide nanowires for chemiresistive gas sensors: Issues, challenges and prospects

2013 ◽  
Vol 439 ◽  
pp. 101-116 ◽  
Author(s):  
Niranjan Ramgir ◽  
Niyanta Datta ◽  
Manmeet Kaur ◽  
S. Kailasaganapathi ◽  
Anil K. Debnath ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Gas Sensors ◽  
Oxide Nanowires ◽  
Metal Oxide Nanowires ◽  
Chemiresistive Gas Sensors

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.

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