ACS Sensors,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 12, 2025
Timely
and
accurate
detection
of
H2S
is
crucial
for
preventing
serious
health
issues
in
both
humans
livestock
upon
exposure.
However,
metal-oxide-based
sensors
often
suffer
from
mediocre
sensitivity,
poor
selectivity,
or
long
response/recovery
time.
Here,
an
atomic
Ru
species-driven
SnO2-based
sensor
fabricated
to
realize
highly
sensitive
selective
at
the
parts
per
billion
level
as
low
100
ppb.
The
shows
a
high
sensing
response
(Rair/Rgas
=
310.1)
ultrafast
time
(less
than
1
s)
20
ppm
operating
temperature
160
°C.
Operando
SR-FTIR
spectroscopic
characterizations
DFT
calculations
prove
that
superior
properties
can
be
mainly
attributed
driven
effect
species
on
formation
surface-adsorbed
oxygen
surface
SnO2,
which
provides
more
active
sites
enhances
performance
SnO2
H2S.
Furthermore,
lab-made
wireless
portable
monitoring
system
developed
rapidly
detect
early
warning,
suggesting
potential
application
system.
This
work
novel
approach
fabricating
gas
by
metal
loaded
metal-oxide
semiconductors.
Progress in Organic Coatings,
Journal Year:
2024,
Volume and Issue:
192, P. 108450 - 108450
Published: April 27, 2024
Textile-based
halochromic
gas
sensors
are
useful
for
detecting
volatile
organic
compounds
(VOCs)
such
as
ammonia,
because
they
undergo
changes
that
distinguishable
to
the
naked
eye.
Herein,
we
report
UV
photografting
system
developed
fabrication
of
cotton
with
reduced
amounts
salt,
resources,
and
effluents.
First,
4-hydroxycoumarin-based
dye
(HD)
was
synthesized
a
indicator,
where
after
dye,
monomer,
photoinitiators
were
introduced
bath
fabricate
system.
This
produced
by
grafting
monomers
on
fiber
surface
under
light
irradiation
formulate
polymer
network
entraps
molecules.
A
series
different
monomer
concentrations
bath.
Subsequently,
dyeability
detection
performance
fabricated
evaluated.
In
addition,
fastness
reusability
tests
performed
ensure
durable
sustainable.
The
increased
concentration
color
change
upon
exposure
ammonia
followed
same
tendency.
sensor
prepared
highest
underwent
distinctive
300
s
(ΔE
>
15).
Furthermore,
exhibited
remarkable
durability
washing
(wash
level:
5,
ΔE
maintenance
rate
washing:
∼85
%)
rubbing
(rubbing
4/5,
rubbing:
∼95
%).
Reusability
testing
showed
property
retained
repeated
(10
cycles).
results
confirmed
UV-induced
had
been
optimized
suggested
offered
an
eco-friendly
alternative
conventional
dyeing
textile
sensors.
ACS Sensors,
Journal Year:
2024,
Volume and Issue:
9(5), P. 2395 - 2401
Published: May 9, 2024
PdNi
alloy
thin
films
demonstrate
exceptional
hydrogen
sensing
performance
and
exhibit
significant
potential
for
application
in
surface
acoustic
wave
(SAW)
sensors.
However,
the
long-term
stability
of
SAW
H2
sensors
utilizing
as
catalysts
experiences
a
substantial
decrease
during
operation.
In
this
paper,
X-ray
photoelectron
spectroscopy
(XPS)
is
employed
to
investigate
failure
mechanisms
under
operational
conditions.
The
XPS
analysis
reveals
that
formation
PdO
species
on
plays
crucial
role
sensing.
Additionally,
density
functional
theory
(DFT)
calculations
indicate
atoms
encounter
diffusion
energy
barrier
penetration
process
from
PdNiOx
subsurface
region.
identification
film
through
DFT
offers
valuable
insights
into
development
gas
with
enhanced
stability.
Guided
by
these
mechanisms,
we
propose
method
restore
response
time
magnitude
certain
extent
reducing
partially
oxidized
atmosphere
at
70
°C,
thereby
restoring
Pd
its
metallic
state
zero
valence.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 6, 2025
Achieving
high
flexibility,
breathability,
and
sensitivity
in
inorganic
semiconductor
gas
sensors
remains
a
substantial
challenge,
especially
for
wearable
applications
high-humidity
environments.
This
study
develops
hyper-flexible,
thermally
stable,
highly
breathable
full-inorganic,
self-supporting
In2–xGaxO3–Al2O3/Al2O3
nanofiber
membrane
sensor,
fabricated
using
dual-spinneret
electrospinning
method
with
an
interlocking
design.
innovative
sensor
has
bilayer
structure
amorphous
Al2O3
substrate
layer
supporting
active
of
high-aspect-ratio
interwoven
In2–xGaxO3
nanofibers,
providing
outstanding
elevated
strong
thermal
stability.
Owing
to
low-concentration
Ga3+
doping
its
nanofiber-built
porous
design,
the
In1.98Ga0.02O3–Al2O3/Al2O3
demonstrates
excellent
sensitivity,
selectivity,
cycling
stability
detecting
ultralow-concentration
NO
biomarker
(≈15
ppb)
under
simulated
breath
conditions,
without
performance
deterioration,
even
after
10000
large-angle
bending
cycles.
work
advances
universal
fabrication
high-performance,
full-inorganic
breath-based
diagnostic
applications.
ACS Sensors,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 30, 2025
This
paper
presents
a
compact
all-fiber
multicomponent
gas
Raman
probe
using
dual-fiber
architecture
within
platinum-coated
capillary.
The
eliminates
the
need
for
conventional
optical
components
like
filters
and
dichroic
mirrors
by
strategically
employing
metal
coating
on
excitation
fiber's
surface
to
suppress
interference
signals.
A
detailed
analysis
of
silica
signal
fluorescence
propagation
system
facilitated
this
design.
Metal-coated
capillary
(MCC),
produced
via
atomic
layer
deposition
(ALD)
platinum
capillaries,
exhibits
excellent
properties
environmental
resilience,
boosting
reception.
Careful
alignment
dual
fibers
relative
optimizes
signal-to-noise
ratio
enhancement.
achieves
detection
limits
21
ppm
CH4,
30
C2H4,
51
C2H6
45
s
exposure,
alongside
rapid
response
time
25
(relative
systems
based
hollow-core
antiresonant
fibers)
robust
stability.
Its
streamlined
path
design
enhance
practicality
across
diverse
fields,
including
agriculture,
industry,
monitoring,
healthcare,
advancing
technology.
Journal of Materials Chemistry B,
Journal Year:
2025,
Volume and Issue:
13(10), P. 3460 - 3470
Published: Jan. 1, 2025
Flexible
gas/breath
sensors
have
emerged
as
a
transformative
solution
in
personalized
healthcare,
offering
innovative
approaches
for
remote,
non-invasive,
and
continuous
monitoring
of
health
indicators
from
breath
samples.
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 24, 2025
Recently,
the
detection
of
acetone
by
using
a
gas
sensor
fabricated
with
metal
oxide
semiconductors
has
stimulated
intense
research
enthusiasm,
owing
to
its
promising
application
in
noninvasive
diagnosis
diabetes
monitoring
human
exhaled
breath.
In
this
work,
potential
was
comodification
nanosheets-assembled
ZnCo2O4
hierarchical
microspheres
(HMSs)
MoO3
and
Ag
nanoparticles
(NPs).
The
HMSs
were
synthesized
via
solvothermal
route
then
sequentially
modified
NPs
immersion,
calcination,
photoreduction
routes.
results
sensing
measurement
indicated
that
after
modification
Ag,
continuous
improvement
sensitivity
realized
on
sensor.
At
optimal
working
temperature
260
°C,
response
best
Ag/MoO3/ZnCo2O4
50
ppm
7.23,
which
about
3.3
1.4
times
higher
than
MoO3/ZnCo2O4,
respectively.
Apart
from
response,
selectivity
speed
also
improved.
density
functional
theory
calculations
showed
enhanced
absorbability
for
should
be
responsible
improved
