ACS Sensors,
Journal Year:
2024,
Volume and Issue:
10(1), P. 320 - 328
Published: Dec. 24, 2024
Mastering
the
surface
chemistry
of
quantum
dots
(QDs)
has
enabled
a
remarkable
gas-sensing
response
as
well
impressive
air
stability.
To
overcome
intrinsic
receptor-transducer
mismatch
QDs,
PbS
QDs
used
sensitive
NO2
receptors
are
spin-coated
on
top
few-layer
MoS2
and
incorporated
into
thin-film
transistor
(TFT)
gas
sensor.
This
architecture
enables
separation
electron
transduction
function
from
chemical
reception
function.
A
comparison
study
through
size
engineering
combined
with
TFT
device
modeling
suggests
unique
dual-gate
modulation
related
to
capacitance
coupling
effect
QDs.
The
favorable
increase
in
sensor
output
current
by
3
orders
magnitude
is
ascribed
high
mobility
MoS2.
optimal
exhibits
(LOD
∼
0.6
ppb),
selective,
recoverable
at
room
temperature.
Because
modulation,
performance
further
optimized
varying
gate
voltage
(a
two-fold
1
ppm
NO2).
Molecules,
Journal Year:
2024,
Volume and Issue:
29(19), P. 4558 - 4558
Published: Sept. 25, 2024
Graphene
and
MXenes
have
emerged
as
promising
materials
for
gas
sensing
applications
due
to
their
unique
properties
superior
performance.
This
review
focuses
on
the
fabrication
techniques,
applications,
mechanisms
of
graphene
MXene-based
composites
in
sensing.
Gas
sensors
are
crucial
various
fields,
including
healthcare,
environmental
monitoring,
industrial
safety,
detecting
monitoring
gases
such
hydrogen
sulfide
(H2S),
nitrogen
dioxide
(NO2),
ammonia
(NH3).
Conventional
metal
oxides
like
tin
oxide
(SnO2)
zinc
(ZnO)
been
widely
used,
but
offer
enhanced
sensitivity,
selectivity,
response
times.
Graphene-based
can
detect
low
concentrations
H2S
NH3,
while
functionalization
improve
gas-specific
selectivity.
MXenes,
a
new
class
two-dimensional
materials,
exhibit
high
electrical
conductivity
tunable
surface
chemistry,
making
them
suitable
selective
sensitive
detection
gases,
VOCs
humidity.
Other
metal-organic
frameworks
(MOFs)
conducting
polymers,
also
shown
potential
which
may
be
doped
into
MXene
layers
sensitivity
sensors.
ChemistrySelect,
Journal Year:
2025,
Volume and Issue:
10(4)
Published: Jan. 1, 2025
Abstract
Exposure
to
high
amounts
of
volatile
organic
compounds
(VOC)
in
the
short
term
can
cause
headaches,
dizziness,
worsening
asthma
symptoms,
vomiting,
and
eye,
nose,
throat
irritation.
Thus,
a
gas
sensor
is
needed
detect
VOC
gases.
Chitosan
as
nonconducting
polymer
was
used
an
alternative
binder
for
thick
film
sensors
this
study.
dissolved
acetic
acid
produce
solution
mixed
with
graphene
nanoflakes
make
sensor.
Two
chitosan
recipes
were
study
investigate
their
performance
VOCs
acetone
ethanol.
A
single
layer
double
deposited
effects
on
sensing.
Single
layers
had
little
effect
sensing
response
ethanol
vapor.
Results
revealed
that
prepared
by
B
responded
better
than
value
achieved
T2‐2‐S1(3)
and,
T2‐2‐S1(1)
1.0579
1.0532,
respectively.
In
addition,
outstanding
performances,
terms
linearity
repeatability
characteristics.
ACS Omega,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 17, 2025
The
liquid
cooling
system
for
lithium
iron
phosphate
battery
modules
usually
faces
the
threat
of
coolant
leakage,
which
would
dramatically
affect
heat
transfer
performance,
safety,
and
efficiency
energy
storage
system.
Herein,
electrochemical
sensing
technology
has
been
first
employed
to
detect
leakage.
Specifically,
ethanol
is
selected
as
additive
reagent
used
main
tested
substance,
sensors
indirectly
identify
leakage
by
detecting
leaked
ethanol.
In
order
overcome
disadvantages
pure
SnO2
detection,
including
poor
response,
low
gas
selectivity,
high
operating
temperature,
microspherical-structured
SnO2/In2O3/C
composite
designed
synthesized
using
a
tin-indium
metal-organic
framework
(SnIn-MOF)
precursor.
fabricated
sensor
exhibits
excellent
gas-sensing
performance.
response
could
reach
30.1
at
280
°C,
1
mL
with
only
0.01%
be
detected
sensor.
Moreover,
also
satisfactory
cycling
repeatability
stability.
This
outstanding
performance
attributed
structural
stability
synergistic
effects
SnO2,
In2O3,
carbon.
work
innovatively
proposed
feasible
method
high-quality
material
detection
in
an
system,
great
importance
application
potential
field
conversion.
Analysis & Sensing,
Journal Year:
2024,
Volume and Issue:
4(6)
Published: June 27, 2024
Abstract
Acetylene
(C
2
H
),
as
an
important
characteristic
gas
in
transformer
fault
diagnosis,
should
be
accurately
detected
and
effectively
distinguished
from
other
dissolved
gases
(H
,
CH
4
C
6
CO,
CO
which
is
crucial
to
determine
whether
the
occurs
type,
but
also
faces
challenges
now.
The
rational
design
employment
of
rare
earth
noble
metals
are
expected
address
this
issue.
In
work,
SnO
‐3
at%
Sm
O
3
‐1
PdO
based
MEMS
sensor
was
prepared
achieve
high
performance
detection
has
a
response
value
56
50
ppm
response/recovery
time
s/136
s,
lower
limit
1
ppm,
power
consumption
15.5
mW,
weak
cross
sensitivity
gases.
Lewis
acids
bases
theory
used
explain
reason
why
benefit
element
improve
selectivity
.
formation
oxygen
vacancies
hetero
junctions
increased
material.
This
study
proved
feasibility
potential
additives
enable
advanced
gas‐sensitive
materials
for
highly
selective
detection.
physica status solidi (a),
Journal Year:
2024,
Volume and Issue:
221(18)
Published: July 4, 2024
In
recent
years,
the
development
of
efficient
and
environmentally
friendly
synthesis
methods
for
nanomaterials
has
gained
significant
attention
in
various
research
fields,
particularly
gas‐sensing
applications.
Among
these
methods,
ultrasonic
stands
out
its
simplicity,
cost‐effectiveness,
ecofriendly
nature.
Herein,
a
simple
green
process
is
used
to
synthesize
SnO
2
nanoparticles‐decorated
rGO
nanosheets.
The
obtained
X‐ray
diffraction
reveals
tetragonal
rutile‐type
crystal
structure.
transmission
electron
microscopy
images
reveal
decoration
nanoparticles
on
surfaces
sheets.
size
4–8
nm
are
identified
Furthermore,
optical
absorbance
photoluminescence
spectra
nanocomposites
validate
charge
migrations
occurring
at
interface
Compared
pristine
nanoparticles,
ultrasonically
synthesized
/rGO
nanocomposite
exhibits
better
sensing
performance
against
NO
gas
shows
selectivity
200
°C.
demonstrates
high
with
appealing
properties
such
as
excellent
responsiveness
(67%
400
°C),
rapid
reaction
time
(18
s),
short
recovery
(25
s).
Sensors,
Journal Year:
2024,
Volume and Issue:
24(14), P. 4560 - 4560
Published: July 14, 2024
This
research
enhances
ethanol
sensing
with
Fe-doped
tetragonal
SnO2
films
on
glass,
improving
gas
sensor
reliability
and
sensitivity.
The
primary
objective
was
to
improve
the
sensitivity
operational
efficiency
of
sensors
through
Fe
doping.
were
synthesized
using
a
flexible
adaptable
method
that
allows
for
precise
doping
control,
energy-dispersive
X-ray
spectroscopy
(EDX)
confirming
homogeneous
distribution
within
matrix.
A
morphological
analysis
showed
surface
structure
ideal
sensing.
results
demonstrated
significant
improvement
in
response
(1
20
ppm)
lower
temperatures
compared
undoped
sensors.
exhibited
higher
sensitivity,
enabling
detection
low
concentrations
showing
rapid
recovery
times.
These
findings
suggest
interaction
between
molecules
surface,
performance.
mathematical
model
based
diffusion
porous
media
employed
further
analyze
optimize
considers
matrix,
considering
factors
such
as
morphology
concentration.
Additionally,
choice
electrode
material
plays
crucial
role
extending
sensor’s
lifespan,
highlighting
importance
selection
design.
