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Scalable and integrated flow synthesis of triple-responsive nano-motors via microfluidic Pickering emulsification

Scalable and integrated flow synthesis of triple-responsive nano-motors via microfluidic Pickering emulsification
Scalable and integrated flow synthesis of triple-responsive nano-motors via microfluidic Pickering emulsification
Artificial micro-/nano-motors are tiny machines as newly emerging tools capable of achieving numerous tasks. In principle, the self-phoretic motions require asymmetric structures in geometry and chemistry. However, conventional production techniques suffered from complex and time consuming multi-step process in low uniformity, and difficult to endow multi-functions into motors. This work disclosed a continuous-flow synthesis of triple-responsive (thermophoretic, chemical and magnetic movement) nano-motors (m-SiO2/Fe3O4-Pdop/Pt) via microfluidic Pickering emulsification in a process of integrated and scalable manner. The droplet microfluidic process allows efficient self-assembly of the silica nanoparticles surrounding the spherical interface of resin droplet, rendering excellent Pickering efficiency and reproducibility, and followed by anisotropic decoration of polydopamine (Pdop) and Pt catalyst in a serial flow process. The obtained Janus nanoparticles reveal double- or triple-responsive self-propulsions with synergic mobility by combining thermophoresis powered by light, catalytic driven motion in H2O2 or magnetic movement by magnet. Further, a non-metallic polydopamine based thermophoretic motion as well as an automated nano-cleaner for rapid water purification by dye removal are convincingly functioned. Finally, this novel integrated flow strategy proves a scalable manufacturing production (> 0.7 g hr−1) of the nano-motors using inexpensive single microreactor, fulfilling quantitative and qualitative needs for versatile applications.
2352-9407
Kaang, Byung Kwon
7e3d3fce-3ce5-4fd5-aa3e-21885b535f6e
Mestre, Rafael
33721a01-ab1a-4f71-8b0e-abef8afc92f3
Kang, Dong-Chang
2b10b44e-2c55-46b5-9b7d-17a613857c47
Sánchez, Samuel
21f41564-f601-4df1-b6a5-3f8138911958
Kim, Dong-Pyo
298fb7c7-adf5-42b0-a118-cbfb05aef335
Kaang, Byung Kwon
7e3d3fce-3ce5-4fd5-aa3e-21885b535f6e
Mestre, Rafael
33721a01-ab1a-4f71-8b0e-abef8afc92f3
Kang, Dong-Chang
2b10b44e-2c55-46b5-9b7d-17a613857c47
Sánchez, Samuel
21f41564-f601-4df1-b6a5-3f8138911958
Kim, Dong-Pyo
298fb7c7-adf5-42b0-a118-cbfb05aef335

Kaang, Byung Kwon, Mestre, Rafael, Kang, Dong-Chang, Sánchez, Samuel and Kim, Dong-Pyo (2020) Scalable and integrated flow synthesis of triple-responsive nano-motors via microfluidic Pickering emulsification. Applied Materials Today, [100854]. (doi:10.1016/j.apmt.2020.100854).

Record type: Article

Abstract

Artificial micro-/nano-motors are tiny machines as newly emerging tools capable of achieving numerous tasks. In principle, the self-phoretic motions require asymmetric structures in geometry and chemistry. However, conventional production techniques suffered from complex and time consuming multi-step process in low uniformity, and difficult to endow multi-functions into motors. This work disclosed a continuous-flow synthesis of triple-responsive (thermophoretic, chemical and magnetic movement) nano-motors (m-SiO2/Fe3O4-Pdop/Pt) via microfluidic Pickering emulsification in a process of integrated and scalable manner. The droplet microfluidic process allows efficient self-assembly of the silica nanoparticles surrounding the spherical interface of resin droplet, rendering excellent Pickering efficiency and reproducibility, and followed by anisotropic decoration of polydopamine (Pdop) and Pt catalyst in a serial flow process. The obtained Janus nanoparticles reveal double- or triple-responsive self-propulsions with synergic mobility by combining thermophoresis powered by light, catalytic driven motion in H2O2 or magnetic movement by magnet. Further, a non-metallic polydopamine based thermophoretic motion as well as an automated nano-cleaner for rapid water purification by dye removal are convincingly functioned. Finally, this novel integrated flow strategy proves a scalable manufacturing production (> 0.7 g hr−1) of the nano-motors using inexpensive single microreactor, fulfilling quantitative and qualitative needs for versatile applications.

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More information

e-pub ahead of print date: 15 October 2020
Published date: December 2020

Identifiers

Local EPrints ID: 448626
URI: http://eprints.soton.ac.uk/id/eprint/448626
ISSN: 2352-9407
PURE UUID: 69ff4623-6028-4f42-a9b0-8c44d7f87c39
ORCID for Rafael Mestre: ORCID iD orcid.org/0000-0002-2460-4234

Catalogue record

Date deposited: 28 Apr 2021 16:32
Last modified: 28 Apr 2022 02:32

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Contributors

Author: Byung Kwon Kaang
Author: Rafael Mestre ORCID iD
Author: Dong-Chang Kang
Author: Samuel Sánchez
Author: Dong-Pyo Kim

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