Fabrication of Silica Nanoparticle Monolayer Arrays Using an Anodic Aluminum Oxide Template | Zendy

Kazutoshi Sekiguchi | Zendy; Takayuki Nakanishi | Zendy; Hiroyo Segawa | Zendy; Atsuo Yasumori | Zendy

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Fabrication of Silica Nanoparticle Monolayer Arrays Using an Anodic Aluminum Oxide Template

Author(s) -

Kazutoshi Sekiguchi,

Takayuki Nakanishi,

Hiroyo Segawa,

Atsuo Yasumori

Publication year - 2019

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.9b02114

Subject(s) - materials science , monolayer , contact angle , anodic aluminum oxide , nanoparticle , coating , nanopore , substrate (aquarium) , fabrication , spin coating , porosity , chemical engineering , template , anodizing , particle (ecology) , nanotechnology , composite material , aluminium , medicine , oceanography , alternative medicine , pathology , geology , engineering

Non-close-packed (NCP) silica nanoparticle monolayer arrays (SNMA) on ordered porous anodic aluminum oxide (AAO) templates were fabricated for the first time by a novel two-step spin-coating technique. The obtained NCP-SNMA-AAO was composed of silica nanoparticles (average primary particle size of 440 nm) and well-organized nanopores on the AAO substrates. NCP-SNMA-AAO with a supporting ratio of 87% silica nanoparticles showed a hydrophilic surface (water contact angle of 51.0°), while the original AAO substrate shows a hydrophobic surface (water contact angle of 107.9°). The maximum coefficient of static friction was decreased by 29% (0.327 → 0.233). The coefficient of dynamic friction was also decreased by 20% (0.281 → 0.226). We found that controlling the silica supporting ratio using the two-step spin-coating technique is an effective approach for surface modification of an AAO substrate.

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