Hierarchical
Nanoporous Silica Films for Wear Resistant Antireflection Coatings
Norihiro Mizoshita
Masahiko Ishii
Naohiko Kato
Hiromitsu Tanaka
10.1021/acsami.5b05659.s001
https://acs.figshare.com/articles/journal_contribution/Hierarchical_Nanoporous_Silica_Films_for_Wear_Resistant_Antireflection_Coatings/2135794
High-performance
antireflection (AR) layers were prepared by depositing hierarchical
nanoporous silica films on glass substrates. We designed a composite
layer consisting of mesoporous silica nanoparticles (MSNs) and a mesoporous
silica matrix. The introduction of bimodal nanoporous structures,
i.e., independent nanopore formation within the MSN and within the
matrix, was achieved by using surface-protected MSNs and a polymeric
nonionic surfactant template during the fabrication process. A porosity
of more than 40% was achieved for composite AR materials. The protrusion
of MSNs from the matrix led to spontaneous formation of nanoscale
roughness on the surface of the coatings, which enhanced the AR properties.
The solid bonding of the MSNs to the nanoporous matrices played an
important role in the achievement of high mechanical durability. The
optimal nanoporous coating, which contained ca. 50 wt % MSN, exhibited
high transparency (91.5–97.5%) and low reflectance (<2.2%),
over the whole range of visible light wavelengths, and sufficient
wear resistance.
2015-09-02 00:00:00
nanoporous matrices
glass substrates
MSN
Hierarchical Nanoporous Silica Films
AR materials
AR properties
nanopore formation
surfactant template
bimodal nanoporous structures
nanoporous coating
mesoporous silica matrix
mesoporous silica nanoparticles
light wavelengths
nanoscale roughness
fabrication process
nanoporous silica films