More Than A Feeling

The atomic force microscope (AFM) allows scientists to see materials at the nanoscale in three dimensions. This is slightly different from the scanning tunnel microscope (STM) which only allows observation in two dimesions. The AFM functions by passing a microfabricated cantilever with an extremely sharp tip through a sample. The spring constant of the cantilever is smaller than atomic forces so the cantilever flexes as it crosses the surface. The result is a high-resolution imaging tool that can also be used for nanomanipulation. Nanomanipulation is commonly used to improve the mechanical performance of materials. Materials can be nanomanipulated to have higher fracture toughness or even be designed to repair themselves mechanically. As one can imagine, these materials are in great demand to industries that build car parts, air plane components, or medical devices. Researchers are also using the AFM to investigate the properties of matter that is undergoing a frictional force. This research will eventually lead to a better understanding of how individual atoms act in close proximity which may result in the development of more effective lubricants.  Read the full article at Mechanical Engineering Magazine.

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