Journal
ACS APPLIED NANO MATERIALS
Volume 4, Issue 9, Pages 8733-8743Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c01288
Keywords
fog collection; biologically inspired designed needle; wettability gradient; Cu nanostructures; glancing angle deposition
Funding
- Tarbiat Modares University
Ask authors/readers for more resources
This study introduces a bioinspired design needle with a remarkable wettability gradient for fast droplet transportation and high-speed fog collection. The azimuthally nonuniform structure of the needle enables efficient fog collection and fast droplet transportation with potential applications in low water regions and microsystems.
Inspired by the natural fog collection of the Namib beetles and desert cacti, a bioinspired design (BID) needle with a remarkable wettability gradient is introduced. Previous studies about directional water transport have rarely investigated wettability gradients along the azimuthal direction of a needle. Here, we have reported on the fast droplet transportation on a BID needle improved by azimuthally varying Cu nanocolumns on a steel acupuncture needle. We have employed glancing angle deposition (GLAD) to produce gradient porous Cu nanocolumns directly on the curved surface of an acupuncture needle. Due to the engineered gradient on such a surface, a high-speed fog collection of V = 134.8 mm.s(-1) and a remarkable acceleration of a = 848.3 mm.s(-2) were observed for the droplets on the needle surface. All periodically created droplets were easily swept along the 40 mm needle path in less than 0.5 s. Such efficient fog collection and fast droplet transportation in the proposed azimuthally nonuniform structure have many potential applications, from fog collection in low water regions to water transportation in microsystems.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available