Controlled placement of highly aligned carbon nanotubes for the manufacture of arrays of nanoscale torsional actuators

Yuzvinsky, T. D.; Fennimore, Adam; Kis, András; Zettl, A.

doi:10.1088/0957-4484/17/2/015

Cited by 39 publications

(29 citation statements)

References 18 publications

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“…This is also evidenced by the restricted sizes of MEMS motors of millimetres to hundreds of micrometres [16][17][18] . Few can reach tens of micrometres and very few can make truly nanoscale motors even using the best available techniques 12,13,19 . It is highly desirable to investigate new mechanisms to realize large arrays of rotary NEMS devices with high efficiency, nanoscale dimensions, reliable performance and at a low cost.…”

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confidence: 99%

Ultrahigh-speed rotating nanoelectromechanical system devices assembled from nanoscale building blocks

et al. 2014

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The development of rotary nanomotors is crucial for advancing nanoelectromechanical system technology. In this work, we report design, assembly and rotation of ordered arrays of nanomotors. The nanomotors are bottom-up assembled from nanoscale building blocks with nanowires as rotors, patterned nanomagnets as bearings and quadrupole microelectrodes as stators. Arrays of nanomotors rotate with controlled angle, speed (over 18,000 r.p.m.), and chirality by electric fields. Using analytical modelling, we reveal the fundamental nanoscale electrical, mechanical and magnetic interactions in the nanomotor system, which excellently agrees with experimental results and provides critical understanding for designing metallic nanoelectromechanical systems. The nanomotors can be continuously rotated for 15 h over 240,000 cycles. They are applied for controlled biochemical release and demonstrate releasing rate of biochemicals on nanoparticles that can be precisely tuned by mechanical rotations. The innovations reported in this research, from concept, design and actuation to application, are relevant to nanoelectromechanical system, nanomedicine, microfluidics and lab-on-a-chip architectures.

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confidence: 99%

Ultrahigh-speed rotating nanoelectromechanical system devices assembled from nanoscale building blocks

et al. 2014

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“…Up to our knowledge, we demonstrate the first torsional actuator, in which the torque is the intrinsic property of the working element: it is not achieved by special configuration of elements ( [12] and Refs. therein) or an external force ( [13] and Refs. therein).…”

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Torsional Strain ofTaS3Whiskers on the Charge-Density Wave Depinning

2007

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We find that an electric current I exceeding the threshold value results in torsional strain of o-TaS3 samples with one contact freely suspended. The rotation angle deltavarphi of the free end achieves several degrees and exhibits hysteresis as a function of I. The sign of deltavarphi depends on the I polarity; a polar axis along the conducting chains (the c axis) is pointed out. We associate the effect with surface shear of the charge-density wave (CDW) coupled to the crystal shear. The current-induced torsional strain could be treated in terms of enormous piezoelectric coefficients (>10(-4) cm/V) corresponding to shear. In essence, TaS3 appears to be a ready torsional actuator based on the unique intrinsic property of the CDW.

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“…This geometry needs to be selectively modified with control over location, length and shells in order to create structures where some shells can axially translate or rotate with respect to others. The most commonly used methods to create nanotube bearings include electrically controlled vaporization of shells [5,7,12] and mechanical shell destruction, either by manipulation [10,14] or electrostatically actuated metal paddles [11,15]. Of these techniques, current driven shell engineering [16][17][18][19][20] is more promising since it is simpler, provides better control over breakdown location and can realize fundamental architectures suited for diverse nanoscale devices.…”

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confidence: 99%

Batch fabrication of nanotube transducers

Subramanian

Choi

Dong

et al. 2007

2007 7th IEEE Conference on Nanotechnology (IEEE NANO)

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Relative displacements between the atomically smooth, nested shells in multiwalled carbon nanotubes (MWNTs) can be used as a robust nanoscale motion enabling mechanism for transduction applications such as bearings, switches, GHz-oscillators, shuttles, memories, syringes and actuators. Here we report on a batch fabrication paradigm suited for structuring large arrays of MWNTs into such devices in a parallel fashion. This effort is enabled by the synergistic integration of several key processes that include dielectrophoretic assembly of individual nanotubes onto nanoelectrodes, site selective shell engineering using electric breakdown with heat dissipation modulation using nanomachined heat sinks, and on-chip characterization. We anticipate this approach to enable the manufacturability of future nanoelectromechanical systems (NEMS) with sophisticated architectures.

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Controlled placement of highly aligned carbon nanotubes for the manufacture of arrays of nanoscale torsional actuators

Cited by 39 publications

References 18 publications

Ultrahigh-speed rotating nanoelectromechanical system devices assembled from nanoscale building blocks

Ultrahigh-speed rotating nanoelectromechanical system devices assembled from nanoscale building blocks

Torsional Strain ofTaS3Whiskers on the Charge-Density Wave Depinning

Batch fabrication of nanotube transducers

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