Zno presents new opportunities to be included in solar cells with grapheneJuly 11, 2018
Zinctimal in Cersaie 2018September 24, 2018
Zinc oxide is one of the most promising materials in the field of electronics, by having excellent optical properties in the ultraviolet. It could replace laser-emitting diodes (LED) visible light, such as gallium arsenide. Additionally, Zn oxide can act as a substrate in heteroepitaxy (of GaN for example). Among the features that have led the zinc oxide to be used in electronics they noteworthy are:
* It has direct gap at room temperature.
* High electrical conductivity.
* High optical transmission in the visible and high reflectance in infrared.
* Good thermal and chemical stability.
Zinc oxide has a great technological interest in low dimensionality structures. Multiple nanostructures in the form of nanoparticles, nano wires, nano fibres can be... Scientists at the University of Karlsruhe have manufactured nano rods of this material that emit light, they can be used on projects and devices that need nano lasers in ultraviolet, is of short wavelength. Also lasers of nano ZnO and GaN threads have been created nano. These nano wires can function as active medium and micro cavity laser emitting in the ultraviolet range and at room temperature.
First, we will define the spintronics. Spintronics is an emerging technology that exploits both the charge of the electron and its spin, which manifests itself as a State of weak magnetic energy. Well as ZnO has also been considered for electronic applications: if it is doped with 1-10% of magnetic as Fe, Mn, Co... ions, ZnO can become ferromagnetic even at room temperature, becoming suitable for such applications spintronics.
Another application of nano ZnO threads is the function as power generators using piezoelectric and semiconducting properties. They could replace the current, much more bulky batteries, and create smaller devices. A good development would turn the mechanical energy from the movement of the body, muscle contraction or streams of fluids in electricity. Nano generators use the produced electricity to bend and release of ZnO nano wires. To obtain enough energy to power a device Nano ordered series must be built a large number of these nano wires. In addition to using these devices within the body, since the ZnO is biocompatible, also could be used there where there is a source of mechanical energy. We have also managed to develop clothing with these nanomaterials capable of supplying energy small portable devices. For example, the army has used this type of technology for costumes of soldiers. Researchers from the Georgia Institute of technology proposed to use them for medical purposes, could be implemented within the human body and serve as a source of power pacemakers or valves due to muscle movement.
Regarding their application as a biosensor, shown that the ZnO can be used to detect cholesterol. These biosensors has high sensitivity and very good detection limit, they were obtained with different structures, but which have a hexagonal-shaped flower-shaped structure have shown greater sensitivity.