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Subject 6 Mechanical properties & more homework questions

Subject 6 Mechanical properties & more homework questions

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The effects of small sizes and (internal) nanostructures Subject 6 Subject 6 Mechanical Properties Mechanical Properties
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Small Small - - scale structures and materials scale structures and materials Nanowires and nanotubes MEMS, NEMS components (beam, chain, gear, spring…..) Nanocrystalline films and lines Mechanical properties important for their integrity and functions Unusual mechanical behavior of interest to basic science
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Example of property measurement for small object: Example of property measurement for small object: AFM three AFM three - point bending test point bending test d t d c d n Cantilever d n Laser beam Laser diode Mirror Position sensitive photodetector Sensor output (displacement & force) Piezoelectric scanner z Z stage Feedback amplifier Nanowire before bending Feedback loop ((x, y, z) position) after bending Tip Sample holder z A B C D (x, y) stage x y
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