Results 301 to 310 of about 2,534,041 (331)
Responsive Materials, EarlyView.This review systematically outlines the preparation of cellulose‐based liquid crystals, highlights structural color regulation and their stimuli responsiveness including temperature‐responsiveness, humidity‐responsiveness, pressure‐responsiveness, tension‐responsiveness, electricity‐responsiveness, magnetic force‐responsiveness and optical properties ...
Jiao Liu +9 more
wiley +1 more source
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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 ...
Wen Wei, Liuhao Zhu, Y. Tai, Xinzhong Li
semanticscholar +1 more source
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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Optical doughnut for optical tweezers
Optics Letters, 2003We describe novel optical doughnuts for optical tweezers. With new phase functions, the proposed doughnut beams have dark cores in specified shapes. The technique can offer a simple method for creating a variety of beam shapes to match the trapped objects.
Xin Yuan, Dawei Zhang
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Controllable Cellular Micromotors Based on Optical Tweezers
Advanced Functional Materials, 2020Micromotors hold exciting prospects in biomedical applications but still face a great challenge. To date, there have been few reports of micromotors with high safety, flexible controllability, and full biocompatibility.
Xiaobin Zou +3 more
semanticscholar +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.
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
openaire +2 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
openaire +3 more sources
Automation of optical tweezers [PDF]
SPIE Proceedings, 2000 Optical tweezers is a newly developed instrument, which makes possible the manipulation of micro-optical particles under a microscope. In this paper, we present the automation of an optical tweezers which consists of a modified optical tweezers, equipped with two motorized actuators to deflect a 1 W argon laser beam, and a computer control system ...
Tseng Ming Hsieh, Bo-Jui Chang, Long Hsu
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