Nanotechnology

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Nanotechnology

  1. 1. Workshop: Nanotechnology By Wilfredo Otaño Nanotechnology is the science that works with materials within the scale of 100 nmor smaller. This technology gives us the ability to understand and manipulate physical andtechnological characteristics of systems. The physical, chemical, and biologicalcharacteristics of materials differ at this nanometer scale, and scientists can have theadvantage of this and apply this technology for different purposes. An advantage ofnanotechnology is that materials have more superficial area, and this can induce morecatalytic reactions, more toughness of materials, and a higher chemical reactivity. In thelab I saw the creation of a censor that detects hydrogen. First of all, we used a substrate ofsilicon that was oxidized by heat. Above the substrate there were fibers of polyethyleneoxide that were created by electrospining. This process uses an electrical charge to drawvery fine fibers from a liquid. Then, using the technique of sputtering, which consists ofbombarding a substrate with materials, creating thin films, a layer of palladium was addedto the fibers. Afterwards, it was bombarded again with gold at the ends of the censor, butthis time a mask was placed in the center of it. Then, the mask was removed, and thecensor was tested. Finally, it was observed how fast it detected hydrogen concentrations.

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