Journal
ACS NANO
Volume 9, Issue 1, Pages 548-554Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn505798w
Keywords
micromotors; nanomotors; step motors; assembly; electric tweezers; nanorobotics; nanoelectromechanical systems (NEMS)
Categories
Funding
- National Science Foundation (NSF) CAREER [CMMI 1150767]
- Welch Foundation [F-1734]
- NIH [9R42ES024023-02]
- NSF [ECCS-1446489]
- Vice President Office for Research at UT-Austin
- Div Of Civil, Mechanical, & Manufact Inn [1150767] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys [1446489] Funding Source: National Science Foundation
- NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES [R42ES024023] Funding Source: NIH RePORTER
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In this study, we investigated the control of the rotation dynamics of an innovative type of rotary micromotors with desired performances by tuning the magnetic interactions among the assembled micro/nanoscale components. The micromotors are made of metallic nanowires as rotors, patterned magnetic nanodisks as bearings and actuated by external electric fields. The magnetic forces for anchoring the rotors on the bearings play an essential role in the rotation dynamics of the micromotors. By varying the moment, orientation, and dimension of the magnetic components, distinct rotation behaviors can be observed, including repeatable wobbling and rolling in addition to rotation. We understood the rotation behaviors by analytical modeling, designed and realized micromotors with step-motor characteristics. The outcome of this research could inspire the development of high-performance nanomachines assembled from synthetic nanoentities, relevant to nanorobotics, microfluidics, and biomedical research.
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