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Open AccessFeature PaperArticle

Micro-Dumbbells—A Versatile Tool for Optical Tweezers

1
Department of Optics and Photonics, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, PL50370 Wrocław, Poland
2
Photonic Nanostructure Facility (PNaF), Faculty of Physics, University of Warsaw, ul. Pasteura 5, PL02093 Warszawa, Poland
3
Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, Gower St, London WC1E 6BT, UK
*
Author to whom correspondence should be addressed.
Micromachines 2018, 9(6), 277; https://doi.org/10.3390/mi9060277
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)
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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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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