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Micromachines 2018, 9(6), 277;

Micro-Dumbbells—A Versatile Tool for Optical Tweezers

Department of Optics and Photonics, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, PL50370 Wrocław, Poland
Photonic Nanostructure Facility (PNaF), Faculty of Physics, University of Warsaw, ul. Pasteura 5, PL02093 Warszawa, Poland
Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, Gower St, London WC1E 6BT, UK
Author to whom correspondence should be addressed.
Received: 11 May 2018 / Revised: 25 May 2018 / Accepted: 29 May 2018 / Published: 1 June 2018
(This article belongs to the Special Issue Polymer Based MEMS and Microfabrication)
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Manipulation of micro- and nano-sized objects with optical tweezers is a well-established, albeit still evolving technique. While many objects can be trapped directly with focused laser beam(s), for some applications indirect manipulation with tweezers-operated tools is preferred. We introduce a simple, versatile micro-tool operated with holographic optical tweezers. The 40 µm long dumbbell-shaped tool, fabricated with two-photon laser 3D photolithography has two beads for efficient optical trapping and a probing spike on one end. We demonstrate fluids viscosity measurements and vibration detection as examples of possible applications. View Full-Text
Keywords: optical tweezers; optical trapping; viscosity; direct laser writing; 3D lithography; two-photon polymerization; micro-tool optical tweezers; optical trapping; viscosity; direct laser writing; 3D lithography; two-photon polymerization; micro-tool

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Lamperska, W.; Drobczyński, S.; Nawrot, M.; Wasylczyk, P.; Masajada, J. Micro-Dumbbells—A Versatile Tool for Optical Tweezers. Micromachines 2018, 9, 277.

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