Electrospun Metal Oxide Nanofibers and Their Сonductometric Gas Sensor Application. Part 2: Gas Sensors and Their Advantages and Limitations

Electrospun metal oxide nanofibers, due to their unique structural and electrical properties, are now being considered as materials with great potential for gas sensor applications. This critical review attempts to assess the feasibility of these perspectives. This article discusses approaches to the manufacture of nanofiber-based gas sensors, as well as the results of analysis of the performances of these sensors. A detailed analysis of the disadvantages that can limit the use of electrospinning technology in the development of gas sensors is also presented in this article. It also proposes some approaches to solving problems that limit the use of nanofiber-based gas sensors. Finally, the summary provides an insight into the future prospects of electrospinning technology for the development of gas sensors aimed for the gas sensor market.

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Electrospun Metal Oxide Nanofibers and Their Conductometric Gas Sensor Application. Part 1: Nanofibers and Features of Their Forming

Nanomaterials ◽

10.3390/nano11061544 ◽

2021 ◽

Vol 11 (6) ◽

pp. 1544

Author(s):

Ghenadii Korotcenkov

Keyword(s):

Electrical Properties ◽

Metal Oxide ◽

Gas Sensor ◽

Critical Review ◽

Basic Principles ◽

Sensor Application ◽

Sensor Applications ◽

Structural And Electrical Properties

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

Proceedings ◽

10.3390/proceedings2130701 ◽

2018 ◽

Vol 2 (13) ◽

pp. 701 ◽

Cited By ~ 1

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.

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Metal/Metal-Oxide Nanoclusters for Gas Sensor Applications

Journal of Nanomaterials ◽

10.1155/2016/2359019 ◽

2016 ◽

Vol 2016 ◽

pp. 1-17 ◽

Cited By ~ 23

Author(s):

Ahmad I. Ayesh

Keyword(s):

Metal Oxide ◽

Gas Sensor ◽

Gas Sensors ◽

Recent Progress ◽

Volume Ratio ◽

Building Blocks ◽

Special Focus ◽

Gaseous Species ◽

Sensor Applications ◽

Metal Metal

The development of gas sensors that are based on metal/metal-oxide nanoclusters has attracted intensive research interest in the last years. Nanoclusters are suitable candidates for gas sensor applications because of their large surface-to-volume ratio that can be utilized for selective and rapid detection of various gaseous species with low-power consuming electronics. Herein, nanoclusters are used as building blocks for the construction of gas sensor where the electrical conductivity of the nanoclusters changes dramatically upon exposure to the target gas. In this review, recent progress in the fabrication of size-selected metallic nanoclusters and their utilization for gas sensor applications is presented. Special focus will be given to the enhancement of the sensing performance through the rational functionalization and utilization of different nanocluster materials.

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Metal-oxide based ammonia gas sensors: A review

Nanoscience &Nanotechnology-Asia ◽

10.2174/2210681210999200718005402 ◽

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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Field Study of Metal Oxide Semiconductor Gas Sensors in Temperature Cycled Operation for Selective VOC Monitoring in Indoor Air

Atmosphere ◽

10.3390/atmos12050647 ◽

2021 ◽

Vol 12 (5) ◽

pp. 647

Author(s):

Tobias Baur ◽

Johannes Amann ◽

Caroline Schultealbert ◽

Andreas Schütze

Keyword(s):

Air Quality ◽

Metal Oxide ◽

Gas Sensor ◽

Gas Sensors ◽

Indoor Air ◽

Ambient Air ◽

Quantitative Agreement ◽

Metal Oxide Semiconductor ◽

Oxide Semiconductor ◽

High Temporal Resolution

More and more metal oxide semiconductor (MOS) gas sensors with digital interfaces are entering the market for indoor air quality (IAQ) monitoring. These sensors are intended to measure volatile organic compounds (VOCs) in indoor air, an important air quality factor. However, their standard operating mode often does not make full use of their true capabilities. More sophisticated operation modes, extensive calibration and advanced data evaluation can significantly improve VOC measurements and, furthermore, achieve selective measurements of single gases or at least types of VOCs. This study provides an overview of the potential and limits of MOS gas sensors for IAQ monitoring using temperature cycled operation (TCO), calibration with randomized exposure and data-based models trained with advanced machine learning. After lab calibration, a commercial digital gas sensor with four different gas-sensitive layers was tested in the field over several weeks. In addition to monitoring normal ambient air, release tests were performed with compounds that were included in the lab calibration, but also with additional VOCs. The tests were accompanied by different analytical systems (GC-MS with Tenax sampling, mobile GC-PID and GC-RCP). The results show quantitative agreement between analytical systems and the MOS gas sensor system. The study shows that MOS sensors are highly suitable for determining the overall VOC concentrations with high temporal resolution and, with some restrictions, also for selective measurements of individual components.

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Pulsed laser deposition of metal oxide nanostructures for highly sensitive gas sensor applications

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2016.04.060 ◽

2016 ◽

Vol 236 ◽

pp. 978-987 ◽

Cited By ~ 25

Author(s):

Joni Huotari ◽

Ville Kekkonen ◽

Tomi Haapalainen ◽

Martin Leidinger ◽

Tilman Sauerwald ◽

...

Keyword(s):

Metal Oxide ◽

Pulsed Laser Deposition ◽

Gas Sensor ◽

Pulsed Laser ◽

Laser Deposition ◽

Sensor Applications ◽

Oxide Nanostructures ◽

Highly Sensitive ◽

Metal Oxide Nanostructures

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Metal-oxide nanostructures produced by PLD in open air for gas sensor applications

Applied Surface Science ◽

10.1016/j.apsusc.2018.11.178 ◽

2019 ◽

Vol 470 ◽

pp. 861-869 ◽

Cited By ~ 12

Author(s):

G. Atanasova ◽

A. Og. Dikovska ◽

T. Dilova ◽

B. Georgieva ◽

G.V. Avdeev ◽

...

Keyword(s):

Metal Oxide ◽

Gas Sensor ◽

Sensor Applications ◽

Oxide Nanostructures ◽

Metal Oxide Nanostructures

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STRUCTURAL AND ELECTRICAL PROPERTIES OF TANTALUM PENTAOXIDE (Ta2O5) THIN FILMS – A REVIEW

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194513010672 ◽

2013 ◽

Vol 22 ◽

pp. 564-569

Author(s):

KANTA RATHEE ◽

B. P. MALIK

Keyword(s):

Thin Films ◽

Dielectric Constant ◽

Electrical Properties ◽

Metal Oxide ◽

High Dielectric Constant ◽

Complementary Metal Oxide Semiconductor ◽

Oxide Semiconductor ◽

Structural And Electrical Properties ◽

High Dielectric ◽

Deposited Films

Down scaling of complementary metal oxide semiconductor transistors has put limitations on silicon dioxide to be used as an effective dielectric. It is necessary to replace the SiO 2 with a physically thicker layer of oxides of high dielectric constant. Thus high k dielectrics are used to suppress the existing challenges for CMOS scaling. Many new oxides are being evaluated as gate dielectrics such as Ta2O5 , HfO2 , ZrO2 , La2O3 , HfO2 , TiO2 , Al2O3 , Y2O3 etc but it was soon found that these oxides in many respects have inferior electronic properties to SiO2 . But the the choice alone of suitable metal oxide with high dielectric constant is not sufficient to overcome the scaling challenges. The various deposition techniques and the conditions under which the thin films are deposited plays important role in deciding the structural and electrical properties of the deposited films. This paper discusses in brief the various deposition conditions which are employed to improve the structural and electrical properties of the deposited films.

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