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    How to make microscale pores on a self-assembled Ag nanoparticle monolayer

    Year: 2019

    Journal: Colloid Interface Sci. Commun., Volume 30, MAY

    Authors: Takekuma, Haruka; Tagomori, Kyohei; Shinohara, Shuhei; Masud, Shihomi; Xu, Yang; Chan, Yinthai; Wang, Pangpang; Ryuzaki, Sou; Okamoto, Koichi; Tamada, Kaoru

    Organizations: JSPS KAKENHIMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI) [26246005]; Singapore-Japan joint research project (JSPS/NUS)

    Keywords: Metal nanoparticles; Pore formation; Self-assembled monolayer

    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.
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