<Emphasis Type="Italic">In situ</Emphasis> Characterization of Nanomechanical Behavior of Free-standing Nanostructures |
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Authors: | P B Kaul U Singh V Prakash |
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Institution: | (1) Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH 44106-7222, USA |
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Abstract: | The present paper reports the development of an in situ nanotensilometer that enables highly reliable mechanical tensile testing on individual micro-/nano-scale structures. The
device features independent measurement of force and displacement histories in the specimen with nanoNewton force and sub-nanometer
displacement resolutions, respectively. Moreover, the device is well suited for in situ testing of free-standing micro/nano-structures
within a high resolution scanning electron microscope (SEM), which permits continuous high-resolution imaging of the specimen
during straining. The device is comprised of two main parts: (a) a three-plate capacitive transducer that doubles up both
as an actuator and a force sensor, and (b) a commercially available nanomanipulator that facilitates transportation and positioning
of nanoscale structures with sub-nanometer precision. In order to conduct the mechanical tests the ends of the specimen are
attached to the probe tips of the device using ion-beam induced deposition. The general capabilities and features of the nanotensilometer
are illustrated by presenting results of nanomechanical tensile tests on electrospun polyaniline microfibers. |
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Keywords: | Polyaniline nanofibers Nanomechanics Nanotensilometer Nanowelding Nanomanipulation |
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