Abstract:
:Surfaces with reversible wettability have broad applications but remain challenging since the switching process is usually energy intensive and complex. In this paper, a pyramid shaped Cu2S film with hierarchical micro/nanostructures is formed on a commercial copper mesh. This film is formed by a spontaneous redox sulfuration reaction and results in a roughened surface, which enables reversible wetting transition between superhydrophilicity to superhydrophobicity. This switching occurs by simple processes such as alternately storing in air or using an ethanol solution treatment and yields cyclic wettability switching for many cycles. This convenient wetting transition behavior, as well as strong stability and efficient oil/water separation with efficiency exceeding 98%, renders it as a potentially useful mesh material for switchable surfaces.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Xu S,Sheng R,Cao Y,Yan Jdoi
10.1038/s41598-019-48952-1subject
Has Abstractpub_date
2019-08-28 00:00:00pages
12486issue
1issn
2045-2322pii
10.1038/s41598-019-48952-1journal_volume
9pub_type
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