1. How to make microscale pores on a self-assembled Ag nanoparticle monolayer
- Author
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Pangpang Wang, Yang Xu, Yinthai Chan, Shihomi Masuda, Koichi Okamoto, Kaoru Tamada, Haruka Takekuma, Kyohei Tagomori, Sou Ryuzaki, and Shuhei Shinohara
- Subjects
Materials science ,Nanoparticle ,Nanotechnology ,Self-assembled monolayer ,02 engineering and technology ,Substrate (electronics) ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Surfaces, Coatings and Films ,Colloid and Surface Chemistry ,Monolayer ,Materials Chemistry ,Physical and Theoretical Chemistry ,Surface plasmon resonance ,0210 nano-technology ,Porosity ,Biosensor ,Microscale chemistry ,Biotechnology - Abstract
In this short communication, we report a procedure for the fabrication of microscale pores on a rigid self-assembled Ag nanoparticle monolayer with nanothickness. Here, condensed water droplets on a hydrophobic substrate are used as a pore formation template for Langmuir-Schaefer film deposition. The optical properties of the Ag nanoparticle monolayer were influenced by the porous structure, e.g., the localized surface plasmon resonance (LSPR) peak was weakened and broadened for the porous monolayer compared with the homogeneous monolayer, even though the number of particles on the substrate should be the same between them. The pores obtained by this method were robust and could be used as a mask for metal deposition or local fluorescence imaging. This environmentally friendly technique can provide a micropatterned surface with a minimal cytotoxicity, which has high potential for LSPR mediated biosensing and bioimaging applications.
- Published
- 2019