pdf construction and calibration of an optical trap on a fluorescence optical microscope

Pdf Construction And Calibration Of An Optical Trap On A Fluorescence Optical Microscope

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Published: 24.11.2020

These laser-based tweezers, or traps, have been employed in numerous biological experiments.

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Optical Tweezers

This design is based on a conventional, inverted microscope, operating under plain bright field illumination. A single laser beam enables standard optical trapping and the measurement of molecular displacements and forces, whereas digital image processing affords real-time sample visualization with reduced noise and enhanced contrast. We have tested our trapping and imaging instrument by measuring the persistence length of individual double-stranded DNA molecules, and by following the stepping of single kinesin motor proteins along clearly imaged microtubules. The approach presented here provides a straightforward alternative for studies of biomaterials and individual biomolecules. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Competing interests: The authors have declared that no competing interests exist.

Authoritative and cutting-edge, Optical Tweezers: Methods and Protocols aims help to further expand the accessibility and use of optical traps by scientists of diverse disciplines. Skip to main content Skip to table of contents. Advertisement Hide. This service is more advanced with JavaScript available. Optical Tweezers Methods and Protocols.

Optical tweezers

This website uses cookies to deliver some of our products and services as well as for analytics and to provide you a more personalized experience. Click here to learn more. By continuing to use this site, you agree to our use of cookies. We've also updated our Privacy Notice. Click here to see what's new. Whether or not an external force can make a trapped particle escape from optical tweezers can be used to measure optical forces. Combined with the linear dependence of optical forces on trapping power, a quantitative measurement of the force can be obtained.

Since the time of their introduction, optical tweezers OTs have grown to be a powerful tool in the hands of biologists. OTs use highly focused laser light to guide, manipulate, or sort target objects, typically in the nanoscale to microscale range. OTs have been particularly useful in making quantitative measurements of forces acting in cellular systems; they can reach inside living cells and be used to study the mechanical properties of the fluids and structures that they contain. As all the measurements are conducted without physically contacting the system under study, they also avoid complications related to contamination and tissue damage. From the manipulation of fluorescent nanodiamonds to chromosomes, cells, and free-swimming bacteria, OTs have now been extended to challenging biological systems such as the vestibular system in zebrafish. Here, we will give an overview of OTs, the complications that arise in carrying out OTs in vivo , and specific OT methods that have been used to address a range of otherwise inaccessible biological questions.


By setting up a well-calibrated single-beam optical trap within a fluorescence gradient force trap (optical tweezers) on an inverted fluorescence microscope. Three-axis translation stage with manual x–y–z micropositioners.


Modular Optical Tweezers

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Давайте же, ребята… уже миллион раз вы меня проверяли. Когда она приблизилась к последнему контрольно-пропускному пункту, коренастый часовой с двумя сторожевыми псами на поводке и автоматом посмотрел на номерной знак ее машины и кивком разрешил следовать. Она проехала по Кэнин-роуд еще сотню метров и въехала на стоянку С, предназначенную для сотрудников. Невероятно, - подумала она, - двадцать шесть тысяч служащих, двадцатимиллиардный бюджет - и они не могут обойтись без меня в уик-энд.

Construction and calibration of an optical trap on a fluorescence optical microscope

 Но, Мидж… - сказал Бринкерхофф.

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3 Comments

  1. Purplelotus

    By setting up a well-calibrated single-beam optical trap within a fluorescence microscope system, one can measure forces and collect.

    25.11.2020 at 11:17 Reply
  2. AgatГіn L.

    Optical tweezers originally called single-beam gradient force trap are scientific instruments that use a highly focused laser beam to hold and move microscopic and sub-microscopic objects like atoms , nanoparticles and droplets, in a manner similar to tweezers.

    30.11.2020 at 03:08 Reply
  3. Olivie B.

    Laser tweezers ; Optical trap.

    30.11.2020 at 07:41 Reply

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