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. Lots of metal oxide nanostructures have been developed to improve the gas sensing properties such as sensitivity selectivity response speed and so on here we provide a brief overview of metal oxide nanostructures and their gas sensing properties from the aspects of particle size morphology and doping when the particle size of metal oxide is close to or less than double thickness of the space charge layer the sensitivity of the sensor will increase remarkably which would be called . 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. Series in sensors metal oxide nanostructures as gas metal oxide nanostructures as gas sensing devices series recently metal oxide gas sensors by nanostructures have stirred interest and have found their way in many applications due to their high sensitivity material design compliance and high safety properties gas performance tests . Metal oxide nanostructures as gas sensing devices series 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 one