Hierarchical nanotexturing enables acoustofluidics on slippery yet sticky, flexible surfaces

Tao, Ran, McHale, Glen, Reboud, Julien, Cooper, Jonathan, Torun, Hamdi, Luo, Jingting, Jikui, Luo, Yang, Xin, Zhou, Jian, Canyelles-Pericas, Pep, Wu, Qiang and Fu, Richard (2020) Hierarchical nanotexturing enables acoustofluidics on slippery yet sticky, flexible surfaces. Nano Letters, 20 (5). pp. 3263-3270. ISSN 1530-6984

[img]
Preview
Text (Final published version)
acs.nanolett.0c00005.pdf - Published Version
Available under License Creative Commons Attribution 4.0.

Download (6MB) | Preview
[img]
Preview
Text (Advance online version)
acs.nanolett.0c00005.pdf - Published Version
Available under License Creative Commons Attribution 4.0.

Download (5MB) | Preview
[img] Text
2019_Nanolett_droplets_revised_final.pdf - Accepted Version
Restricted to Repository staff only until 30 March 2021.

Download (968kB) | Request a copy
Official URL: https://doi.org/10.1021/acs.nanolett.0c00005

Abstract

The ability to actuate liquids remains a fundamental challenge in smart microsystems, such as those for soft robotics, where devices often need to conform to either natural or three-dimensional solid shapes, in various orientations. Here, we propose a hierarchical nanotexturing of piezoelectric films as active microfluidic actuators, exploiting a unique combination of both topographical and chemical properties on flexible surfaces, while also introducing design concepts of shear hydrophobicity and tensile hydrophilicity. In doing so, we create nanostructured surfaces that are, at the same time, both slippery (low in-plane pinning) and sticky (high normal-to-plane liquid adhesion). By enabling fluid transportation on such arbitrarily shaped surfaces, we demonstrate efficient fluid motions on inclined, vertical, inverted, or even flexible geometries in three dimensions. Such surfaces can also be deformed and then reformed into their original shapes, thereby paving the way for advanced microfluidic applications.

Item Type: Article
Uncontrolled Keywords: Hierarchical nanotexture, slippery surface, flexible devices, acoustofluidics, droplet transport
Subjects: F100 Chemistry
F300 Physics
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 01 Apr 2020 13:10
Last Modified: 25 Jun 2020 13:45
URI: http://nrl.northumbria.ac.uk/id/eprint/42646

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics