ACS Omega,
Journal Year:
2024,
Volume and Issue:
10(1), P. 1364 - 1372
Published: Dec. 23, 2024
Here,
we
investigate
the
interactions
between
five
representative
gaseous
analytes
and
two
poly(ionic
liquids)
(PILs)
based
on
sulfopropyl
acrylate
polyanion
in
combination
with
alkylphosphonium
cations,
P4,4,4,4
P4,4,4,8,
their
nanocomposites
fullerenes
(C60,
C70)
to
reveal
potential
of
PILs
as
sensitive
layers
for
gas
sensors.
The
were
chosen
molecular
size
(all
them
containing
carbon
atoms)
variation
functional
groups:
alcohol
(ethanol),
nitrile
(acetonitrile),
aldehyde
(acetaldehyde),
halogenated
alkane
(bromoethane),
carboxylic
acid
(acetic
acid).
six
variations
PILs─P4,4,4,4SPA
(1),
P4,4,4,4SPA
+
C60
(1
C60),
C70
C70),
P4,4,4,8SPA
(2),
(2
C70)─were
characterized
by
UV–vis
Raman
spectroscopy,
each
analyte
studied
using
electrochemical
impedance
spectroscopy.
Exposure
all
PIL
samples
acetaldehyde,
bromoethane,
ethanol
leads
a
decrease
diffusion
coefficient,
while
exposure
acetic
reveals
an
increase.
Fullerene-doping
significantly
enhances
response
analyte.
Semiempirical
quantum
mechanical
xTB-GFN2
calculations
revealed
that
hydrogen
bonding
proton
transfer
events
play
important
role
during
detection
process.
Micromachines,
Journal Year:
2024,
Volume and Issue:
15(6), P. 808 - 808
Published: June 20, 2024
Creatures
in
nature
make
extensive
use
of
structural
color
adaptive
camouflage
to
survive.
Cholesteric
liquid
crystals,
with
nanostructures
similar
those
natural
organisms,
can
be
combined
actuators
produce
bright
colors
response
a
wide
range
stimuli.
Structural
modulated
by
nano-helical
structures
continuously
and
selectively
reflect
specific
wavelengths
light,
breaking
the
limit
recognizable
human
eye.
In
this
review,
current
state
research
on
cholesteric
crystal
photonic
their
technological
applications
is
presented.
First,
basic
concepts
crystals
nanostructural
modulation
are
outlined.
Then,
responding
different
stimuli
(mechanical,
thermal,
electrical,
humidity,
magnetic,
pneumatic)
This
review
describes
practical
summarizes
prospects
for
development
these
advanced
as
well
challenges
promising
applications.
Small,
Journal Year:
2024,
Volume and Issue:
20(47)
Published: Aug. 23, 2024
Abstract
Dual‐mode
humidity
sensors
have
received
wide
attention
in
recent
years
due
to
their
great
potential
multifunction
applications.
Herein,
following
a
“two
birds
with
one
stone”
strategy,
dual‐mode
and
self‐powered
low
sensor
based
on
LiBr‐MOF‐801
high
response
power
generation
is
proposed.
The
optimized
LiBr‐MOF‐801‐based
exhibits
impedance–voltage
sensitivity
the
range
of
0–23%
relative
(RH)
(57.1
0.61
V),
small
hysteresis
(0.3%
RH)
good
long‐term
stability
at
room
temperature
(20
°C).
Moreover,
an
integrated
generator
obtained
by
series
connection
within
15
cm
2
,
output
voltage
reaches
2.6
V
density
110
nW
−2
can
be
used
as
energy,
supplying
commercial
electronic
equipment
even
humidity.
This
work
provides
new
sight
for
fabricating
high‐performance,
dual‐mode,
low‐humidity
sensors.
