Results 291 to 300 of about 39,013 (312)
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Advances in Colloid and Interface Science, 2010
We describe the physics behind a peculiar feeding mechanism of a certain class of shorebirds, in which they transport their prey in droplets from their beak tips mouthwards. The subtle interplay between the drop and the beak's tweezering motion allows the birds to defy gravity through driving the drop upwards. This mechanism provides a novel example of
David Quéré +3 more
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We describe the physics behind a peculiar feeding mechanism of a certain class of shorebirds, in which they transport their prey in droplets from their beak tips mouthwards. The subtle interplay between the drop and the beak's tweezering motion allows the birds to defy gravity through driving the drop upwards. This mechanism provides a novel example of
David Quéré +3 more
openaire +3 more sources
Nano Today, 2011
Electric tweezers utilize DC and AC electric fields through voltages applied on patterned electrodes to manipulate nanoentities suspended in a liquid. Nanowires with a large aspect ratio are particularly suitable for use in electric tweezers for patterning, assembling, and manipulation.
D L, Fan +3 more
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Electric tweezers utilize DC and AC electric fields through voltages applied on patterned electrodes to manipulate nanoentities suspended in a liquid. Nanowires with a large aspect ratio are particularly suitable for use in electric tweezers for patterning, assembling, and manipulation.
D L, Fan +3 more
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Nature Photonics, 2011 The fact that light carries both linear and angular momentum is well-known to physicists. One application of the linear momentum of light is for optical tweezers, in which the refraction of a laser beam through a particle provides a reaction force that draws the particle towards the centre of the beam.
Miles J. Padgett, Richard Bowman
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The Journal of the Acoustical Society of America, 1991
A stable force potential well was generated by two collimated focused ultrasonic (3.5 MHz) beams propagating along opposite directions. Latex particles (270-μm diameter) and clusters of frog eggs were trapped in the potential well. The trapped object can be moved axially or laterally by moving one of the PZT focusing transducers that generate the ...
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A stable force potential well was generated by two collimated focused ultrasonic (3.5 MHz) beams propagating along opposite directions. Latex particles (270-μm diameter) and clusters of frog eggs were trapped in the potential well. The trapped object can be moved axially or laterally by moving one of the PZT focusing transducers that generate the ...
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Microrheology with optical tweezers
Lab on a Chip, 2009Microrheology is the study of the flow of materials over small scales. It is of particular interest to those involved with investigations of fluid properties within Lab-on-a-Chip structures or within other micron-scale environments. The article briefly reviews existing active and passive methods used in the study of fluids.
Yao, Alison +3 more
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Are electron tweezers possible?
Ultramicroscopy, 2011Positively answering the question in the title, we demonstrate in this work single electron beam trapping and steering of 20-300nm solid Al nanoparticles generated inside opaque submicron-sized molten Al-Si eutectic alloy spheres. Imaging of solid nanoparticles and liquid alloy in real time was performed using energy filtering in an analytical ...
Vladimir P. Oleshko, James M. Howe
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Accounts of Chemical Research, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
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AbstractFor Abstract see ChemInform Abstract in Full Text.
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The AFM tweezers: integration of a tweezers function with an AFM probe
The 13th International Conference on Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05., 2005A prototype of AFM (atomic force microscope) tweezers is presented. In order to combine the function of nano objects manipulation with AFM observation, we have developed a tweezers-type AFM probe device using micromachining technology. The device has two thin wedge-type arms shaped by anisotropic etching and local oxidation of silicon techniques; one ...
T. Takekawa +2 more
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Optical Trapping and Optical Micromanipulation XV, 2018
Feedback traps can manipulate particles arbitrarily. In a feedback trap, a position detector detects the particle’s position, a computer calculates the necessary force to be applied based on the position in the “virtual potential,” which is applied to the particle. The process is repeated with as fast a loop rate as practical.
Avinash Kumar, John Bechhoefer
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Feedback traps can manipulate particles arbitrarily. In a feedback trap, a position detector detects the particle’s position, a computer calculates the necessary force to be applied based on the position in the “virtual potential,” which is applied to the particle. The process is repeated with as fast a loop rate as practical.
Avinash Kumar, John Bechhoefer
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2007
We outline the basic principles of optical tweezers as well as the fundamental theory underlying optical tweezers. The optical forces responsible for trapping result from the transfer of momentum from the trapping beam to the particle and are explained in terms of the momenta of incoming and reflected or refracted rays.
Nieminen, T. A. +3 more
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We outline the basic principles of optical tweezers as well as the fundamental theory underlying optical tweezers. The optical forces responsible for trapping result from the transfer of momentum from the trapping beam to the particle and are explained in terms of the momenta of incoming and reflected or refracted rays.
Nieminen, T. A. +3 more
openaire +3 more sources