Results 21 to 30 of about 50 (42)
Some of the next articles are maybe not open access.
Cycloid-structured optical tweezers
Optics Letters, 2023We designed novel cycloid-structured optical tweezers based on a modified cycloid and holographic shaping techniques. The optical tweezers realize all the dynamic characteristics of the trapped particles, including start, stop, and variable-velocity motions along versatile trajectories.
Wenjun Wei +3 more
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Microsphere-coupled optical tweezers
Optics Letters, 2021In this Letter, we study the optical trapping of particles in a focal spot engineered by a combination of a dielectric microsphere and the conventional optical tweezers setup. The dielectric microsphere is placed in the laser path before the focal spot, and its impact on the trapping stiffness is theoretically and experimentally studied in detail.
Mohammad Hossein Khosravi +2 more
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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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2017
This book gives an accessible, detailed overview on techniques of single molecule biophysics (SMB), showing how they are applied to numerous biological problems associated with understanding the molecular mechanisms of DNA replication, transcription, and translation, as well as functioning of molecular machines.
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This book gives an accessible, detailed overview on techniques of single molecule biophysics (SMB), showing how they are applied to numerous biological problems associated with understanding the molecular mechanisms of DNA replication, transcription, and translation, as well as functioning of molecular machines.
openaire +3 more sources
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
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Optimizing your optical tweezers
Nature Methods, 2006A new measurement theory for dual-trap optical tweezers shows researchers for the first time how to easily optimize their experiments to limit noise from Brownian movement.
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IEEE Nanotechnology Magazine, 2011
The optical tweezer, with the ability to apply force and deformation on a micro scaled object on the order of piconewton (pN, 10~12 N) and nanometer (nm, 10~9 m), is utilized in this study to manipulate primitive myeloblasts from acute myeloid leukemia (AML) patients for biomechanical properties characterization. Mcrobeads are attached to cell surfaces
Youhua Tan +4 more
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The optical tweezer, with the ability to apply force and deformation on a micro scaled object on the order of piconewton (pN, 10~12 N) and nanometer (nm, 10~9 m), is utilized in this study to manipulate primitive myeloblasts from acute myeloid leukemia (AML) patients for biomechanical properties characterization. Mcrobeads are attached to cell surfaces
Youhua Tan +4 more
openaire +1 more source
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.
Kumar, Avinash, Bechhoefer, John
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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.
Kumar, Avinash, Bechhoefer, John
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Introduction to Optical Tweezers
2016Thirty years after their invention by Arthur Ashkin and colleagues at Bell Labs in 1986 [1], optical tweezers (or traps) have become a versatile tool to address numerous biological problems. Put simply, an optical trap is a highly focused laser beam that is capable of holding and applying forces to micron-sized dielectric objects.
Matthias D, Koch, Joshua W, Shaevitz
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2008
The craze for miniaturization has swept o’er most every nation, but should a hand e’er so slightly tremble no micro-machine can it assemble: and so all those really small bits leave the technicians in fits and the hope for a lab on a chip might seem frightfully flip. Yet, while optical forces are weak they provide the control that we seek. When light’s
Gabriel C. Spalding +2 more
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The craze for miniaturization has swept o’er most every nation, but should a hand e’er so slightly tremble no micro-machine can it assemble: and so all those really small bits leave the technicians in fits and the hope for a lab on a chip might seem frightfully flip. Yet, while optical forces are weak they provide the control that we seek. When light’s
Gabriel C. Spalding +2 more
openaire +1 more source