2 research outputs found
Unconventional Janus Properties of Enokitake-like Gold Nanowire Films
We
report on unconventional Janus material properties of vertically
aligned gold nanowire films that conduct electricity and interact
with light and water in drastically different ways on its two opposing
sides. These Janus-like properties originate from enokitake-like nanowire
structures, causing the nanoparticle side (āheadā) to
behave like bulk gold, yet the opposing nanowire side (ātailā)
behaves as discontinuous nanophases. Due to this Janus film structure,
its head side is hydrophilic but its tail side is hydrophobic; its
head side reflects light like bulk gold, yet its tail side is a broadband
superabsorber; its tail side is less conductive but with tunable resistance.
More importantly, the elastomer-bonded Janus film exhibits unusual
mechatronic properties when being stretched, bent, and pressed. The
tail-bonded elastomeric sheet can be stretched up to ā¼800%
strain while remaining conductive, which is about 10-fold that of
head-bonded film. In addition, it is also more sensitive to bending
forces and point loads than the corresponding tail-bonded film. We
further demonstrate the versatility of nanowire-based Janus films
for pressure sensors using bilayer structures in three different assembly
layouts
Unconventional Janus Properties of Enokitake-like Gold Nanowire Films
We
report on unconventional Janus material properties of vertically
aligned gold nanowire films that conduct electricity and interact
with light and water in drastically different ways on its two opposing
sides. These Janus-like properties originate from enokitake-like nanowire
structures, causing the nanoparticle side (āheadā) to
behave like bulk gold, yet the opposing nanowire side (ātailā)
behaves as discontinuous nanophases. Due to this Janus film structure,
its head side is hydrophilic but its tail side is hydrophobic; its
head side reflects light like bulk gold, yet its tail side is a broadband
superabsorber; its tail side is less conductive but with tunable resistance.
More importantly, the elastomer-bonded Janus film exhibits unusual
mechatronic properties when being stretched, bent, and pressed. The
tail-bonded elastomeric sheet can be stretched up to ā¼800%
strain while remaining conductive, which is about 10-fold that of
head-bonded film. In addition, it is also more sensitive to bending
forces and point loads than the corresponding tail-bonded film. We
further demonstrate the versatility of nanowire-based Janus films
for pressure sensors using bilayer structures in three different assembly
layouts