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Indian Institute of Technology (IIT) Roorkee 
Ultrafast smart resistive type room temperature humidity sensor based on γ-Fe2O3-rGO Nano hybrids and its multifunctional applications 
Atul Kumar, Anil Kumar and G.D. Varma 
Indian Institute of Technology (IIT) Roorkee 
Application type:
Applied - 2020-02-20 
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Indian Institute of Technology (IIT) Roorkee 
The present invention relates to a system and method of ultrafast resistive type humidity sensor based on nanohybrids. The present sensor can record different breathing patterns as well as has the ability to detect breathing at different rates. It senses the water contents from the human finger (dry/wet) including the sweating in human being. The reduced graphene oxide based nanohybrids has been synthesized for sensing of humidity. Nanohybrids have been developed using carbon nanostructure(s). In an embodiment, metal oxide base nanohybrids such as without limitation ZnO/Fe2O3/ TiO2/SnO2/based nanohybrids has been synthesized. The present sensor is of high sensitivity, ultrahigh response and recovery time. 

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