In-fibre particle manipulation and device assembly via laser induced thermocapillary convection

Jing Zhang, Zhe Wang, Zhixun Wang, Ting Zhang and Lei Wei ()
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Jing Zhang: Nanyang Technological University
Zhe Wang: Nanyang Technological University
Zhixun Wang: Nanyang Technological University
Ting Zhang: Nanyang Technological University
Lei Wei: Nanyang Technological University

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract The ability to manipulate in-fibre particles is of technological and scientific significance, yet particle manipulation inside solid environment remains fundamentally challenging. Here we show an accurately controlled, non-contact, size- and material-independent method for manipulating in-fibre particles based on laser-induced thermocapillary convection. The laser liquefaction process transforms the fibre from a solid media into an ideal fluid environment and triggers the in-fibre thermocapillary convection. In-fibre particles, with diameter from submicron to hundreds of microns, can be migrated toward the designated position. The number of particles being migrated, the particle migration velocity and direction can be precisely controlled. As a proof-of-concept, the laser-induced flow currents lead to the migration-to-contact of dislocated in-fibre p- and n-type semiconductor particles and the forming of dual-particle p-n homo- and heterojunction directly in a fibre. This approach not only enables in-fibre device assembly to achieve multi-component fibre devices, but also provide fundamental insight for in-solid particle manipulation.

Date: 2019
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DOI: 10.1038/s41467-019-13207-0

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