Nanovortex-Driven All-Dielectric Optical Diffusion Boosting and Sorting Concept for Lab-on-a-Chip Platforms

Canós, V.A.; Kislov, D.A.; Gurvitz, E.A.; Shamkhi, H.K.; Pavlov, A.A.; Redka, D.N.; Yankin, S.S.; Zeḿanek, P.; Shalin, A.S.

Авторы: Canós Valero Adrià, Kislov Denis A., Gurvitz Egor A., Shamkhi Hadi K., Pavlov Alexander A., Redka D.N., Yankin Sergey S., Zeḿanek Pavel, Shalin Alexander S.
Журнал: Advanced Science
Том: 7
Номер: 11
Год издания: 2020
Издательство: Wiley-Blackwell
Местоположение издательства: United States
DOI: 10.1002/advs.201903049
Аннотация: The ever-growing field of microfluidics requires precise and flexible control over fluid flows at reduced scales. Current constraints demand a variety of controllable components to carry out several operations inside microchambers and microreactors. In this context, brand-new nanophotonic approaches can significantly enhance existing capabilities providing unique functionalities via finely tuned light−matter interactions. A concept is proposed, featuring dual on-chip functionality: boosted optically driven diffusion and nanoparticle sorting. High-index dielectric nanoantennae is specially designed to ensure strongly enhanced spin−orbit angular momentum transfer from a laser beam to the scattered field. Hence, subwavelength optical nanovortices emerge driving spiral motion of plasmonic nanoparticles via the interplay between curl−spin optical forces and radiation pressure. The nanovortex size is an order of magnitude smaller than that provided by conventional beam-based approaches. The nanoparticles mediate nanoconfined fluid motion enabling moving-part-free nanomixing inside a microchamber. Moreover, exploiting the nontrivial size dependence of the curled optical forces makes it possible to achieve precise nanoscale sorting of gold nanoparticles, demanded for on-chip separation and filtering. Altogether, a versatile platform is introduced for further miniaturization of moving-part-free, optically driven microfluidic chips for fast chemical analysis, emulsion preparation, or chemical gradient generation with light-controlled navigation of nanoparticles, viruses or biomolecules. © 2020 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Добавил в систему: Шалин Александр Сергеевич

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Nanovortex-Driven All-Dielectric Optical Diffusion Boosting and Sorting Concept for Lab-on-a-Chip Platformsстатья

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