Plasmon-Driven Photochemical Reduction Reaction on Silver Nanostructures for Green Fabrication of Superhydrophobic Surface

Green fabrication of superhydrophobic surface by water-based processing is still challenging, because introduction of the substances with hydrophilic moieties compromises its superhydrophobicity. Herein, a plasmon-driven photochemical reduction reaction under ultraviolet light (UVA) irradiation is f...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2023-11, Vol.19 (47), p.e2303536-e2303536
Main Authors: Chao, Shengmao, Shao, Hong, Wang, Xiao, Zhang, Yongzheng, Jiang, Ruifeng, Fan, Meikun, Chen, Shuwei, Tang, Changyu
Format: Article
Language:English
Subjects:
Adsorbates
Chemical reduction
Coating
Deoxygenation
Hydrophilicity
Hydrophobicity
Nanoparticles
Nanotechnology
Photochemical reactions
Raman spectra
Silver
Substrates
Surface plasmon resonance
Ultraviolet radiation
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Summary:Green fabrication of superhydrophobic surface by water-based processing is still challenging, because introduction of the substances with hydrophilic moieties compromises its superhydrophobicity. Herein, a plasmon-driven photochemical reduction reaction under ultraviolet light (UVA) irradiation is first discovered and is applied to deoxygenation of hydrophilic organic adsorbates on rough nano-Ag coating for the formation of stable superhydrophobic surface. A nano-Ag coating with strong localized surface plasmon resonance in the UVA region is prepared by a water-based silver mirror reaction and results in a unique chemical reduction reaction on its surface. Consequently, the low residual hydrophilic functionalities and the formed cross-linked structure of the adsorbate on Ag nanoparticles (NPs) enables the coating to exhibit stable superhydrophobicity against to both air and water. The superhydrophobic Ag NP-coated sandpaper can also be used as a surface-enhanced Raman scattering (SERS) substrate to concentrate aqueous analytes for trace detection.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.202303536