Nanomanipulation of Carbon Nanotubes and Nanowires
This project focuses on manipulation of nanoscale objects, such as Carbon Nanotubes
(CNTs) and Nanowires (NWs) in conjunction with other ongoing efforts on nanodevice
and in-situ SEM/TEM testing in the group.
Over the past few years, many novel materials have been developed at nanometer
scale including nanotubes, wires and coils. Nanomanipulation is a first and
critical step for achieving any functional nanodevices and material property
measurements on these nano-objects. Two major methods are used in these successful
manipulations: electron beam induced deposition (EBID) and tape/glue adhesion. For
EBID, electron beam is employed to weld nanostructures using specially introduced
gas precursors (e.g. platinum deposition). For adhesion, the manipulator probe
touches an adhesive carbon tape and then approaches the nano-object. The later
method is simple but lacks control over where, when, and in what state the
nano-object sticks to the probe. A
nanomanipulator from Klocke Nanotechnik
has been installed in a FEI DB235 SEM/FIB dual beam system. Extensive manipulation
of 1-D objects combined with FIB nanomachining is under way.
Klocke Nanotechnik: Nanomanipulator
Klocke Nanotechnik: Nanofinger
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H.D. Espinosa (PI)
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B. Peng (Graduate Student)
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O. Loh (Graduate Student)
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H.-H. Wang (Argonne National Lab)
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Y. Zhu and H.D. Espinosa.
"An electromechanical material testing system for in situ
electron microscopy and applications,"
Proceedings of the National Academy of Sciences of the USA,
Vol. 102, pp. 14503-14508, 2005.
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Y. Zhu, N. Moldovan and H.D. Espinosa.
"A microelectromechanical load sensor for in situ electron
and x-Ray microscopy tensile testing of nanostructures,"
Applied Physics Letters, Vol. 86, pp. 013506, 2005.
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C.-H. Ke, N. Pugno, B. Peng and H.D. Espinosa.
"Experiments and Modeling of Nanotube NEMS Devices,"
Journal of the Mechanics and Physics of Solids,Vol.53, pp.1314-1333, 2005.
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