Blog de cursos y estudiantes de Químicas del Departamento de Ciencias Quimico-Biológicas en la Universidad de las Américas Puebla.
Thursday, November 10, 2011
Cheaper, more sensitive nanotechnology-based flexible hydrogen sensors developed.
With hydrogen vehicles already embracing carbon-reduction footprints, global warming seems to be moving a step further with its nobility - its sensors.
you can see above one of these flexible hydrogen s
The now available hydrogen sensors may soon be replaced by a newly developed flexible sensor, which is not only comparatively cheaper but also explores the world of nano-technology! Thanks the researchers at the U.S. Argonne National Laboratory.
What could help make the sensors cheaper is the use of ‘only’ palladium nanoparticles instead of pure palladium.
But, of course this will not compromise on its pure-palladium-like efficiency. To add to, it can be used in many applications - ranging from aircraft to portable electronics. To detect a hydrogen leakage caused by even tiny pinholes in the space shuttle pipe, the new technology can be of great use.
The new sensing devices is fabricated by using a two-step process separated by hig] h and low temperatures. First, at around 900 degrees C, researchers grow SWNTs [single-walled carbon nanotubeson a silicon substrate using chemical vapor deposition. Then, researchers transfer the SWNTs onto a plastic substrate at temperatures lower than 150 degrees C using a technique called dry transfer printing.
And the result:-
The new sensors are highly sensitive, thus fast responding and quick recovering. The plastic sheets it uses help reduce the overall weight, increasing the mechanical flexibility as well as shock resistance.
Thus, its wide range - as well as sensitive and affordable - applications seem to be making the hydrogen (or eco-friendly) vehicles gradually affordable to more and more people who are environmentally conscious, but could not serve it because of the hard-to-meet costs.