Document Type
Article
Publication Date
6-11-2019
Publication Title
Applied Physics Letters
Publisher
AIP Publishing
Volume
114
Issue
23
First page number:
1
Last page number:
4
Abstract
By combining spin coating and inverse nanotransfer printing, silica-coated gold nanoparticles are patterned onto polydimethylsiloxane (PDMS) superhydrophobic surfaces to form a hierarchical structure. A layer of nanoparticles is spin-coated on a flat silicon substrate serving as the stamp, which is then transferred to the raised regions of PDMS surfaces. Our inverse nanotransfer printing is in contrast to the standard nanotransfer printing, which transfers metal from the raised regions of a stamp to a flat PDMS surface. The fabricated hierarchical surface exhibits a higher contact angle and delays the Cassie-Wenzel transition during evaporation of a sessile droplet, indicating an improvement of superhydrophobicity. Finally, we demonstrate that the fabricated nanoparticle-based superhydrophobic surfaces can enhance the Raman intensity and significantly decrease the surface-enhanced Raman scattering detection limit.
Disciplines
Mechanical Engineering | Nanotechnology Fabrication
File Format
File Size
2.277 KB
Language
English
Repository Citation
Zhai, S.,
Zhao, H.
(2019).
Silica-Coated Metallic Nanoparticle-Based Hierarchical Super-Hydrophobic Surfaces Fabricated by Spin-Coating and Inverse Nanotransfer Printing.
Applied Physics Letters, 114(23),
1-4.
AIP Publishing.
http://dx.doi.org/10.1063/1.5098780