Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 13, Pages 10608-10613Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am5022717
Keywords
carbon nanotubes; water harvesting; asymmetric functionalization; hydrophobic; hydrophilic
Funding
- U.S. Department of Defense: U.S. Air Force Office of Scientific Research for the Project MURI Synthesis and Characterization of 3-D Carbon Nanotube Solid Networks [FA9550- 12- 1 -0035]
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Creating ordered microstructures with hydrophobic and hydrophilic moieties that enable the collection and storage of small water droplets from the atmosphere, mimicking structures that exist in insects, such as the Stenocara beetle, which live in environments with limited amounts of water. Inspired by this approach, vertically aligned multiwalled carbon nanotube forests (NTFs) are asymmetrically end-functionalized to create hygroscopic scaffolds for water harvesting and storage from atmospheric air. One side of the NTF is made hydrophilic, which captures water from the atmosphere, and the other side is made superhydrophobic, which prevents water from escaping and the forest from collapsing. To understand how water penetrates into the NTF, the fundamentals of water/NTF surface interaction are discussed.
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