Chemosensors,
Год журнала:
2024,
Номер
12(12), С. 268 - 268
Опубликована: Дек. 19, 2024
This
study
explores
the
surface
chemistry
and
electrical
responses
of
ultra-high-sensitivity
SnO2
MEMS
arrays
to
enable
a
novel
sequential
detection
methodology
for
detecting
nitrogen
dioxide
(NO2)
ethanol
(C2H5OH)
as
route
achieve
selective
gas
sensing
in
electronic
nose
(E-nose)
applications.
Utilizing
tin
oxide
(SnO2)
thin
films
deposited
via
atomic
layer
deposition
(ALD),
array
achieves
lowest
reported
limits
8
parts
per
billion
(ppb)
NO2.
The
research
delves
into
mechanisms
NO2
C2H5OH,
both
individually
subsequent
exposures,
assessing
sensor’s
dynamic
response
across
various
operating
temperatures.
It
demonstrates
rapid
recovery
times,
with
averages
48
s
277
40
C2H5OH.
Understanding
role
individual
gases
on
is
paramount
discerning
exposure
behavior.
oxidizing
behavior
C2H5OH
following
attributed
interactions
between
oxygen
vacancies
surface,
which
leads
formation
nitrate
or
nitrite
species.
These
species
subsequently
influence
inducing
properties,
need
be
carefully
considered.
Principal
component
analysis
(PCA)
was
used
further
improve
capability
precisely
identify
quantify
mixtures,
improving
its
applicability
real-time
monitoring
complex
scenarios.
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 28, 2025
ABSTRACT
Improving
the
mechanical
properties
of
novel
prosthetic
heart
valves
is
key
to
facilitating
application
biological
valves.
Screening
polymer
materials
that
can
be
used
for
basis
preparation
This
study
focused
on
screening
and
optimization
different
types
nylon
electrospun
fibers.
First,
nylon‐6
(PA
6),
nylon‐66
66),
nylon‐612
612),
nylon‐11
11),
nylon‐12
12)
were
selected
as
spinning
precursors,
only
PA
6,
66,
12
completely
dissolved
obtain
a
solution
with
concentration
16
wt%.
Among
them,
12,
66
fiber
membranes.
Then,
fibrous
membranes
obtained
under
conditions
19
kV,
distance
15–20
cm,
humidity
20%,
then
three
investigated
compared
each
other
fibers
nylon,
such
tensile
strength,
Young's
modulus,
toughness.
Finally,
we
chose
6
spinneret
designed
solutions
gradients,
subsequently
prepared
at
an
optimal
wt%
voltage
excellent
overall
performance:
diameter
was
concentrated
0.19
±
0.02
μm.
The
toughness
10.25
0.518
MPa,
101.12
5.85
2.51
0.145
MJ
m
−3
,
respectively.
promising
candidate
new
Applied Physics Letters,
Год журнала:
2025,
Номер
126(17)
Опубликована: Апрель 28, 2025
In
recent
years,
high-entropy
oxides
(HEOs)
have
attracted
significant
attention
owing
to
the
synergistic
effects
arising
from
their
multi-elemental
structure.
this
study,
we
investigate
spinel
(CuCoNiCrMn)3O4
HEO
as
a
selective
sensor
for
NO2.
A
comprehensive
investigation
of
its
crystal
structure,
micromorphology,
elemental
information,
and
gas
sensing
properties
has
been
conducted.
Gas
tests
show
that
delivers
dramatic
response
To
further
explore
impact
entropy
on
properties,
medium-entropy
Mn0.2Ni0.8Fe2O4,
Ni0.99Co0.01Mn0.01Fe1.99O4
low-entropy
NiMn2O4
also
synthesized
evaluated.
Both
experimental
density
function
theory
studies
demonstrate
exhibits
superior
performance,
attributable
enhanced
charge
transfer
orbital
hybridization
between
Co
atoms
in
O
This
work
addresses
relationship
configuration
(ΔSconfig)
thereby
advancing
exploration
materials
high
performance
applications.
Nanomaterials,
Год журнала:
2024,
Номер
14(16), С. 1322 - 1322
Опубликована: Авг. 6, 2024
The
detection
of
trimethylamine
(TMA)
is
critically
important
due
to
its
toxic
and
flammable
nature,
which
poses
significant
risks
human
health
the
environment.
However,
achieving
high
response,
rapid
kinetics,
selectivity,
low
operating
temperatures
in
TMA
sensing
remains
challenging.
In
this
study,
WS2/WO3
nanohybrids
with
flower-like
hierarchical
structures
were
synthesized
via
an
situ
sulfurization
process,
utilizing
varying
amounts
thioacetamide
control
state
WO3.
These
novel
exhibit
remarkable
selectivity
towards
TMA,
as
well
response
recovery
characteristics.
Specially,
optimal
sensor,
composed
5%
nanohybrids,
demonstrates
exceptional
performance,
including
a
(19.45
at
10
ppm),
good
repeatability,
reliable
long-term
stability,
theoretical
limit
(15.96
ppb).
superior
capabilities
are
attributed
formation
p-n
heterojunctions
interface,
unique
structures,
catalytic
activity
WS2.
Overall,
work
provides
straightforward
versatile
approach
for
synthesizing
multifunctional
nanomaterials
by
combining
metal
oxide
micro-flowers
transition
dichalcogenide
nanoflakes
applications
monitoring
complex
environments.
