Nanotechnology and Electron Microscopy

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Nanotechnology and Electron Microscopy

  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 advantageof this and apply this technology in different purposes. An advantage of nanotechnology isthat materials have more superficial area, and this can induce more catalytic reactions, moretoughness of materials, and a higher chemical reactivity. In the lab I saw the creation of acensor that detects hydrogen. First of all, we used a substrate of silicon that was oxidizedby heat. Above the substrate there were fibers of polyethylene oxide that were created byelectrospining. This process uses an electrical charge to draw very fine fibers from a liquid.Then, using the technique of sputtering, which consists of bombarding a substrate withmaterials, creating thin films, a layer of palladium was added to the fibers. Afterwards, itwas bombarded again with gold at the ends of the censor, but this time a mask was placedin the center of it. Then, the mask was removed, and the censor was tested. Finally, it washow fast it detected hydrogen concentrations.

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