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Optofluidic vortex arrays generated by graphene oxide for tweezers, motors and self-assembly
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. South China Normal University, China; Zhejiang University, China.
2016 (English)In: NPG Asia Materials, ISSN 1884-4049, Vol. 8, e257Article in journal (Refereed) PublishedText
Abstract [en]

Manipulating large numbers of a variety of particles/wires is essential for many lab-on-a-chip technologies. Here we generate a planar array of optofluidic vortices with photothermal gradients from an easy-fabricated graphene oxide (GO) heater to achieve high-throughput and multiform manipulation at low excitation power and low loss. As a tweezer, each vortex can rapidly capture and confine particles without restrictions on shapes and materials. The stiffness of the confinement is easily tuned by adjusting the vortex dimension. As a motor, it can actuate any traps to persistently rotate/spin in clockwise or anti-clockwise mode. As a high-performance 'workshop', this work lays the groundwork for various self-assembly ranging from colloid-based clusters, chains, capsules, shells and ultra-thin films, through particles' surface modification and fusion, to nanowire-based architectures. Furthermore, we can create multiple vortex arrays through fabricating an array of heaters, which enables massively parallel manipulation and distributed operations all on a chip.

Place, publisher, year, edition, pages
Nature Publishing Group, 2016. Vol. 8, e257
Keyword [en]
Clocks, Graphene, Self assembly, Surface treatment, Ultrathin films, Distributed operations, Excitation power, Graphene oxides, High throughput, Lab-on-a-chip technology, Massively parallels, Planar arrays, Vortex arrays
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-187189DOI: 10.1038/am.2016.12ISI: 000379671900001ScopusID: 2-s2.0-84962861996OAI: oai:DiVA.org:kth-187189DiVA: diva2:929347
Note

QC 20160518

Available from: 2016-05-18 Created: 2016-05-18 Last updated: 2016-08-12Bibliographically approved

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