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.
Nano-Micro Letters,
Год журнала:
2024,
Номер
16(1)
Опубликована: Авг. 14, 2024
Abstract
As
information
acquisition
terminals
for
artificial
olfaction,
chemiresistive
gas
sensors
are
often
troubled
by
their
cross-sensitivity,
and
reducing
cross-response
to
ambient
gases
has
always
been
a
difficult
important
point
in
the
sensing
area.
Pattern
recognition
based
on
sensor
array
is
most
conspicuous
way
overcome
cross-sensitivity
of
sensors.
It
crucial
choose
an
appropriate
pattern
method
enhancing
data
analysis,
errors
improving
system
reliability,
obtaining
better
classification
or
concentration
prediction
results.
In
this
review,
we
analyze
mechanism
We
further
examine
types,
working
principles,
characteristics,
applicable
detection
range
algorithms
utilized
gas-sensing
arrays.
Additionally,
report,
summarize,
evaluate
outstanding
novel
advancements
methods
identification.
At
same
time,
work
showcases
recent
utilizing
these
identification,
particularly
within
three
domains:
ensuring
food
safety,
monitoring
environment,
aiding
medical
diagnosis.
conclusion,
study
anticipates
future
research
prospects
considering
existing
landscape
challenges.
hoped
that
will
make
positive
contribution
towards
mitigating
gas-sensitive
devices
offer
valuable
insights
algorithm
selection
applications.
Abstract
Recently
wearable
breath
sensors
have
received
significant
attention
in
personalized
healthcare
systems
by
offering
new
methods
for
remote,
non‐invasive,
and
continuous
monitoring
of
various
health
indicators
from
samples
without
disrupting
daily
routines.
The
rising
demand
rapid,
diagnostics
has
sparked
concerns
over
electronic
waste
short‐lived
silicon‐based
devices.
To
address
this
issue,
the
development
flexible
sensing
applications
is
a
promising
approach.
Research
highlights
different
flexible,
operating
with
principles,
such
as
chemiresistive
to
detect
specific
target
analytes
due
their
simple
design,
high
sensitivity,
selectivity,
reliability.
Further,
focusing
on
non‐invasive
detection
biomarkers
through
exhaled
breath,
offer
comprehensive
environmentally
friendly
solution.
This
article
presents
discussion
recent
advancement
biomarkers.
further
emphasizes
intricate
functioning
sensor,
including
selection
criteria
both
substrate
advanced
functional
materials,
mechanisms.
review
then
explores
potential
gas
disease
detection,
modern
challenges
associated
sensors.
ACS Applied Engineering Materials,
Год журнала:
2024,
Номер
2(2), С. 262 - 285
Опубликована: Янв. 25, 2024
Amid
global
concerns
over
water
scarcity
and
escalating
environmental
pollution,
there
has
been
a
surge
in
research
innovation
for
pioneering
wastewater
purification
technologies.
Advanced
micro
nanomanufacturing
methods
emerge
as
promising
avenues
to
enhance
conventional
treatment
efficiency.
This
review
guides
readers
through
recent
advancements,
merging
precision
engineering
at
micro/nanoscales
with
intricacies,
yielding
transformative
solutions.
Exploring
lithography-based
techniques,
additive
manufacturing,
self-assembly,
microfluidics,
it
uncovers
diverse
approaches
crafting
materials
interact
neutralize
pollutants.
The
manuscript
navigates
the
fusion
of
micro/nanomanufacturing
urgent
need
clean
water.
By
showcasing
empowered
surpassing
traditional
treatment,
tackles
expanding
pollutant
challenges.
Beyond
compiling
breakthroughs,
this
seeks
inspire
future
by
illuminating
how
manufacturing
can
address
holding
potential
combat
safeguard
ecosystems
generations.
npj Flexible Electronics,
Год журнала:
2024,
Номер
8(1)
Опубликована: Май 29, 2024
Abstract
Dental,
oral,
and
craniofacial
diseases
jeopardize
health
reduce
the
quality
of
life.
Accessing
disease-related
signals
in
advance
is
beneficial
to
prevent
occurrence
or
progression
those
diseases.
However,
inconvenience
periodical
in-hospital
examinations
difficulty
sustaining
daily
monitoring
challenge
personal
compliance
possibly
lead
limited
prevention
treatment.
Medical
flexible
electronics
are
electric
devices
fabricated
on
soft
extensible
substrates
fit
human
skin
enable
non-invasive
continuous
biophysical/biochemical
signals.
They
provide
possibility
long-term,
continuous,
comfortable,
wireless
healthcare
expected
alleviate
time
economic
consumption
by
avoiding
Therefore,
have
emerged
for
early
diagnosis
disease
stomatology.
It
noteworthy
that
special
characteristics
environment
dental,
areas
bring
distinct
challenges
need
address
ingeniously
ensure
their
stability,
selectivity,
sensitivity.
This
review
summaries
specificity
when
used
applications,
including
saliva
cavity-gas
related
biosignals,
sensing
mechanical
fluctuation
from
facial
muscle/respiratory
activities
orthodontic
forces,
executing
functions
postoperative
recovery
relevant
Furthermore,
after
analyzing
current
proposing
potential
solutions,
“5I”
principles
imperceptibility,
intelligence,
individualization,
integration,
inexpensiveness
presented
help
guide
future
development
promote
commercialization
medicine.
ACS Sensors,
Год журнала:
2024,
Номер
9(3), С. 1465 - 1474
Опубликована: Фев. 27, 2024
In
the
realm
of
NH3
gas-sensing
applications,
electrically
conductive
nature
Ti3C2Tx
MXene,
adorned
with
surface
terminations
such
as
−O
and
−OH
groups,
renders
it
a
compelling
material.
However,
inherent
challenges
atmospheric
instability
selectivity
in
presence
gas
mixtures
have
prompted
exploration
innovative
solutions.
This
work
introduces
strategic
solution
through
deposition
mixed-matrix
membrane
(MMM)
composed
poly(vinylidene
fluoride)
(PVDF)
matrix
zeolitic
imidazolate
framework-67
(ZIF-67)
filler.
composite
acts
selective
filter,
permitting
passage
specific
gas,
namely
NH3.
Leveraging
hydrophobic
chemically
inert
PVDF,
MMM
enhances
stability
by
impeding
water
molecules
from
interacting
MXene.
Furthermore,
ZIF-67
is
to
via
acid–base
interactions
within
zeolite
group
pore
size.
The
sensor
embedded
filter
exhibits
modest
1.3%
change
sensing
response
25
ppm
compared
without
filter.
result
underscores
filter's
effectiveness
conferring
diffusivity,
particularly
at
35%
relative
humidity
(RH)
°C.
Crucially,
attributes
PVDF
impart
heightened
even
amidst
varying
RH
conditions.
These
results
not
only
demonstrate
effective
detection
but
also
highlight
sensor's
adaptability
diverse
environmental
conditions,
offering
promising
prospects
for
practical
applications.
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 3, 2025
Self-organization
under
out-of-equilibrium
conditions
is
ubiquitous
in
natural
systems
for
the
generation
of
hierarchical
solid-state
patterns
complex
structures
with
intricate
properties.
Efforts
applying
this
strategy
to
synthetic
materials
that
mimic
biological
function
have
resulted
remarkable
demonstrations
programmable
self-healing
and
adaptive
materials.
However,
extension
these
efforts
multifunctional
stimuli-responsive
across
defined
spatial
distributions
remains
an
unrealized
technological
opportunity.
This
paper
describes
use
a
nonequilibrium
reaction–diffusion
process
achieve
synthesis
electrically
conductive
metal–organic
framework
(cMOF)
gelled
medium
control
over
particle
size
periodicity
on
macroscopic
scale.
Upon
integration
into
chemiresistive
devices,
resulting
cMOF
particles
exhibit
size-dependent
response
toward
hydrogen
sulfide
gas,
as
determined
by
their
distinct
surface-to-volume
ratio,
porosity,
unique
methodology,
unusual
microcrystallite
morphology
compared
counterparts
obtained
through
bulk
solution
phase
synthesis.
Taken
altogether,
achievements
pave
way
gaining
access
functional
nanomaterials
well-defined
chemical
composition,
dimensions,
precisely
tailored
functions
using
far-from-equilibrium
approaches.
The
current
research
aims
to
synthesize
zinc
oxide
decorated
with
palladium
nanoparticles
and
develop
a
stable
sensor
high
sensitivity
hydrogen
gas
dissolved
in
oil.
ZnO
nanorods
(NR)
were
synthesized
by
hydrothermal
method
directly
onto
commercial
board
gold
interdigital
electrodes,
followed
functionalization
Pd
(NP)
drop
casting.
SEM
images
show
NRs
an
average
diameter
of
∼220
nm
spherical
NPs
diameters
35-75
nm.
Finally,
the
sensing
properties
examined
immersing
into
insulating
mineral
oil
closed
system,
where
different
H2
concentrations
(from
0
up
500
ppm)
injected
headspace
then
oil,
according
Ostwald
coefficient.
All
measurements
carried
out
at
room
temperature.
electrical
characterization
showed
that
our
had
good
repeatability,
stability,
detect
lower
(less
than
10
ppm).
Additionally,
nanoengineered
porous
layer
PDMS
was
prepared
over
through
spin
coating
heat
treatment,
reached
∼2.8
ppm
gas.
Our
findings
indicate
methodology
applied
improves
detection
performance
industrial
applications
its
potential
use
for
real-time
monitoring.
