10.1021/jacs.6b06947.s001
Dong-Po Song
Dong-Po
Song
Aditi Naik
Aditi
Naik
Shengkai Li
Shengkai
Li
Alexander Ribbe
Alexander
Ribbe
James J. Watkins
James J.
Watkins
Rapid,
Large-Area Synthesis of Hierarchical Nanoporous
Silica Hybrid Films on Flexible Substrates
American Chemical Society
2016
photo
Flexible Substrates
decomposition products
Hierarchical Nanoporous Silica Hybrid Films
nano
light energy
Large-Area Synthesis
roll-to-roll manufacturing
wt
xenon flash lamp
block copolymer surfactant
foaming effect
film
silica source
nm
2016-10-05 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Rapid_Large-Area_Synthesis_of_Hierarchical_Nanoporous_Silica_Hybrid_Films_on_Flexible_Substrates/3997008
We
report a simple strategy for the creation of large-area nanoporous
hybrid films of silica, carbon, and gold on polyethylene terephthalate
via photothermal processing. This method enables the selective
heating of light-absorbing thin films on low-temperature substrates
using sub-millisecond light pulses generated by a xenon flash
lamp. The film contains gold nanoparticles as the nanoheaters
to convert light energy to heat, a sacrificial block copolymer surfactant
to generate mesopores, and cross-linked polyhedral oligomeric
silsesquioxane as the silica source to form the skeleton of
the porous structure. Hierarchical porous structures are achieved
in the films after photothermal treatment, with uniform mesopores
(44–48 nm) on the surface and interconnected macropores
(>50 nm) underneath resulting from a foaming effect during
release
of gaseous decomposition products. The loading of gold nanoparticles
is up to 43 wt % in the product,
with less than 2 wt % organic residue. This rapid and large-area process
for the synthetis of porous structures is compatible with roll-to-roll
manufacturing for the fabrication of flexible devices.