Bioinspired Two-Dimensional Structure with Asymmetric Wettability Barriers for Unidirectional and Long-Distance Gas Bubble Delivery Underwater

Image credit: Nano Letters

Abstract

Gas bubble manipulations in liquid have long been concerned due to its vital role in various gas-related fields. To deal with the weakness in long-distance gas transportation of previous works, we take inspiration from the Nepenthes pitcher plant’s leaves, and successfully prepared a two-dimensional superaerophilic surface decorated with asymmetric aerophobic barriers capable of unidirectional and long-distance gas bubble delivery. For the first time, this process is investigated by in-situ bubble releasing experiments under the record of a high-speed camera and finite element modeling, which demonstrates a kinetic process regulated by the anisotropic motion resistance arising from the patterns. Furthermore, the Nepenthes alata-inspired two-dimensional surface (NATS) is integrated into water electrolysis system for H2 directional transportation and efficient collection. As a result, the NATS design is proved to be a potential solution for facile manipulation of gas bubbles and provides a simple, adaptive, and reliable strategy for long-range gas transport underwater.

Publication
Nano Letters
Xiao Xiao (肖潇)
Xiao Xiao (肖潇)
PhD student

My research focuses on bioelectronics, bioinspired materials, as well as nanotechnology for energy and healthcare applications.

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