Results 41 to 50 of about 39,013 (312)
3D dynamic motion of a dielectric micro-sphere within optical tweezers
Opto-Electronic Advances, 2021 Known as laser trapping, optical tweezers, with nanometer accuracy and pico-newton precision, plays a pivotal role in single bio-molecule measurements and controllable motions of micro-machines.
Jing Liu +3 more
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A three-dimensional steerable optical tweezer system for ultracold atoms [PDF]
Review of Scientific Instruments 89, 103105 (2018), 2018 We present a three-dimensional steerable optical tweezer system based on two pairs of acousto-optic deflectors. Radio frequencies used to steer the optical tweezers are generated by direct digital synthesis and multiple cross beam dipole traps can be produced through rapid frequency toggling and time averaging.
arxiv +1 more source
Optical Tweezers Approaches for Probing Multiscale Protein Mechanics and Assembly
Frontiers in Molecular Biosciences, 2020 Multi-step assembly of individual protein building blocks is key to the formation of essential higher-order structures inside and outside of cells. Optical tweezers is a technique well suited to investigate the mechanics and dynamics of these structures ...
Kathrin Lehmann +7 more
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Relaxing constraints on data acquisition and position detection for trap stiffness calibration in optical tweezers [PDF]
, 2020 Optical tweezers find applications in various fields, ranging from biology to physics. One of the fundamental steps necessary to perform quantitative measurements using trapped particles is the calibration of the tweezer's spring constant. This can be done through power spectral density analysis, from forward scattering detection of the particle's ...
arxiv +1 more source
Acoustoelectronic nanotweezers enable dynamic and large-scale control of nanomaterials
Nature Communications, 2021 Precise and dynamic manipulation of nano-objects on a large scale has been challenging. Here, the authors introduce acoustoelectronic nanotweezers, combining precision of electronic tweezers with large-field dynamic control of acoustic tweezers ...
Peiran Zhang +10 more
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Tweezers for Chimeras in Small Networks [PDF]
Physical Review Letters, 2016 We propose a control scheme which can stabilize and fix the position of chimera states in small networks. Chimeras consist of coexisting domains of spatially coherent and incoherent dynamics in systems of nonlocally coupled identical oscillators. Chimera states are generally difficult to observe in small networks due to their short lifetime and erratic
Omelchenko, Iryna +4 more
openaire +5 more sources
A Step-by-step Guide to the Realisation of Advanced Optical Tweezers [PDF]
, 2015 Since the pioneering work of Arthur Ashkin, optical tweezers have become an indispensable tool for contactless manipulation of micro- and nanoparticles. Nowadays optical tweezers are employed in a myriad of applications demonstrating the importance of these tools. While the basic principle of optical tweezers is the use of a strongly focused laser beam
arxiv +1 more source
Optofluidic tweezer on a chip [PDF]
Biomicrofluidics, 2010 A novel method to realize an optical tweezer involving optofluidic operation in a microchannel is proposed. To manipulate the optical tweezer, light from an optical fiber is passed through both PDMS (polydimethylsiloxane)-air surface lenses and an optofluidic region, which is located in a control channel.
Shohei Kaneda +3 more
openaire +2 more sources
Optical Tweezers Exploring Neuroscience [PDF]
Frontiers in Bioengineering and Biotechnology, 2020 Over the past decade, optical tweezers (OT) have been increasingly used in neuroscience for studies of molecules and neuronal dynamics, as well as for the study of model organisms as a whole. Compared to other areas of biology, it has taken much longer for OT to become an established tool in neuroscience.
Isaac C. D. Lenton +4 more
openaire +4 more sources
Optical Trapping and Manipulation of Superparamagnetic Beads Using Annular-Shaped Beams
Methods and Protocols, 2018 We propose an optical tweezers setup based on an annular-shaped laser beam that is efficient to trap 2.8 μ m-diameter superparamagnetic particles.
Leandro Oliveira +2 more
doaj +1 more source