Metal Oxide Nanostructures as Gas Sensing Devices

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  • Details various nanomaterials useful for gas sensing applications and explains the advantages of these nanostructured materials
  • Covers the oxides of aluminum, bismuth, cadmium, cerium, cobalt, copper, gallium, indium, iridium, iron, molybdenum, nickel, niobium, tellurium, tin, titanium, tungsten, vanadium, zinc, and zirconium
  • Examines the ways to synthesize nanometal oxides and obtain different nano features
  • Describes devices, such as Schottky diodes and FET sensors, that are based on nanostructures


Metal Oxide Nanostructures as Gas Sensing Devices explores the development of an integrated micro gas sensor that is based on advanced metal oxide nanostructures and is compatible with modern semiconductor fabrication technology. This sensor can then be used to create a compact, low-power, handheld device for analyzing air ambience.

The book first covers current gas sensing tools and discusses the necessity for miniaturized sensors. It then focuses on the materials, devices, and techniques used for gas sensing applications, such as resistance and capacitance variations. The author addresses the issues of sensitivity, concentration, and temperature dependency as well as the response and recovery times crucial for sensors. He also presents techniques for synthesizing different metal oxides, particularly those with nanodimensional structures. The text goes on to highlight the gas sensing properties of many nanostructured metal oxides, from aluminum and cerium to iron and titanium to zinc and zirconium. The final chapters deal with existing and future devices that are based on nanostructures.

Miniaturized systems that analyze air ambience need sensors capable of identifying different gaseous species. Exploring state-of-the-art gas sensing devices, this book shows how nanostructured metal oxides are ideally suited for use as gas sensing elements.

Table of Contents


Miniaturized Solid-State Gas Sensors
Gas Chromatography–Mass Spectrometry
Fourier Transform Infrared Spectrometer
Miniaturized Solid-State Gas Sensors

Gas Sensing Materials and Devices

Metal Oxide-Based Gas Sensor Devices
Techniques Used for Gas Sensing
Sensor Properties

Advantages of Nanomaterials

Synthesis and Characterization of Nanometal Oxides

Nanostructured Metal Oxides and Gas Sensing Devices
Aluminum Oxides
Bismuth Oxides
Cadmium Oxides
Cerium Oxides
Cobalt Oxides
Copper Oxides
Gallium Oxides
Indium Oxides
Iridium Oxides
Iron Oxides
Molybdenum Oxides
Nickel Oxides
Niobium Oxides
Tellurium Oxides
Tin Oxides
Titanium Oxides
Tungsten Oxides
Vanadium Oxides
Zinc Oxides
Zirconium Oxides
Mixed Oxides

Active Devices Based on Nanostructures
Diodes and Schottky Diodes
Field-Effect Transistors (FETs)
FET-Based Gas Sensors

Future Devices and Nanostructured Gas Sensor Arrays
Future Devices and Gas-Sensor Arrays
Summary and Conclusions

Appendix: Tables



Author Bio(s)

G. Eranna is a scientist in the Sensors and Nanotechnology Group at the Central Electronics Engineering Research Institute (CEERI) of the Council of Scientific and Industrial Research (CSIR) in Pilani, India. He earned a Ph.D. from IIT Madras and has authored more than 70 publications. His research interests include MEMS-based micro gas sensors, integrated circuit fabrication technology, CMOS process standardization, solid-state micro gas sensors, MEMS devices and nanostructures, and the development of micro heaters for on-chip utilities.