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A zinc oxide nanorod sensor or ZnO
GaN-based and ZnO nanorod sensors for wireless hydrogen leak detection
International symposium on processes at the compound-semiconductor/solution interface, Quebec PQ , Canada etc.) in the ambient atmosphere. The sensor exploits enhanced surface area (and thus surface activity) intrinsic to all nano-sized materials, including ZnO nanorods.
Mater. Sci. Eng. R 52 (2006) 49
* S.J. Pearton et al. "ZnO-based nanowires
Nano 4 (2007) 201
* W. Park et al. "Catalyst-free growth of ZnO nanorods and their nanodevice applications
Int. J. Nanotechnology 3 (2006) 372
For the future hydrogen economy, a tiny, self-powered sensor
Gas sensors Nanoelectronics
A zinc oxide nanorod sensor or ZnO nanorod
In nanotechnology, nanorods are one morphology of nanoscale objects. Each of their dimensions range from 1–100 nm. They may be synthesized from metals or semiconducting materials. Standard aspect ratios (length divided by width) are 3-5. Na ...
sensor
A sensor is a device that produces an output signal for the purpose of sensing a physical phenomenon.
In the broadest definition, a sensor is a device, module, machine, or subsystem that detects events or changes in its environment and sends ...
is an electronic or optical device detecting presence of certain gas or liquid molecules (e.g. humidity, NO, hydrogen,Lin, J. et al. (2015GaN-based and ZnO nanorod sensors for wireless hydrogen leak detection
International symposium on processes at the compound-semiconductor/solution interface, Quebec PQ , Canada etc.) in the ambient atmosphere. The sensor exploits enhanced surface area (and thus surface activity) intrinsic to all nano-sized materials, including ZnO nanorods.
Adsorption
Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. This process creates a film of the ''adsorbate'' on the surface of the ''adsorbent''. This process differs from absorption, in which a f ...
of molecules on the nanorods can be detected through variation of the nanorods' properties, such as photoluminescence, electrical conductivity
Electrical resistivity (also called specific electrical resistance or volume resistivity) is a fundamental property of a material that measures how strongly it resists electric current. A low resistivity indicates a material that readily allow ...
, vibration frequency, mass, etc. The simplest and thus most popular way is to pass electrical current
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by ...
through the nanorods and observe its changes upon exposure to gas.
Synthesis can be obtained by a hydrothermal method using 1:1 Molar solution of hexamine and Zinc nitrate solution kept together for 56 hours in an autoclave at 60-70 degree Celsius.
See also
*Hydrogen safety
Hydrogen safety covers the safe production, handling and use of hydrogen, particularly hydrogen gas fuel and liquid hydrogen.
Hydrogen possesses the NFPA 704's highest rating of 4 on the flammability scale because it is flammable when mixed even i ...
*List of sensors
This is a list of sensors sorted by sensor type.
Acoustic, sound, vibration
*Geophone
*Hydrophone
*Microphone
* Pickup
*Seismometer
*Sound locator
Automotive
* Air flow meter
*AFR sensor
*Air–fuel ratio meter
* Blind spot monitor
*Cranksh ...
*Nanoelectromechanical systems
Nanoelectromechanical systems (NEMS) are a class of devices integrating electrical and mechanical functionality on the nanoscale. NEMS form the next logical miniaturization step from so-called microelectromechanical systems, or MEMS devices. NEM ...
References
{{reflistReviews
* J. G. Lu et al. "Quasi-one-dimensional metal oxide materials—Synthesis, properties and applications" (42 pagesMater. Sci. Eng. R 52 (2006) 49
* S.J. Pearton et al. "ZnO-based nanowires
Nano 4 (2007) 201
* W. Park et al. "Catalyst-free growth of ZnO nanorods and their nanodevice applications
Int. J. Nanotechnology 3 (2006) 372
External links
For the future hydrogen economy, a tiny, self-powered sensor
Gas sensors Nanoelectronics