Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 20, 2024
Abstract
Breathing
is
an
important
physiological
health
indicator
of
the
human
body.
Real
time
and
long‐term
monitoring
with
low
attenuation
respiratory
status
great
significance.
However,
working
performance
sensors
typically
placed
at
mouth
nose
body
greatly
affected
by
exhaled
moisture
small
pollutants.
Here,
all‐nanofiber
self‐powered
sensor
(ASRS)
a
multi‐layer
stacking
structure
developed
based
on
contact
electrification
or
triboelectrification
effect.
By
spraying
method
to
chemically
graft
surface
energy
octadecyltrichlorosilane
(OTS)
molecules
onto
nanofibers,
ASRS
endowed
excellent
superhydrophobicity
self‐cleaning
properties,
making
it
free
from
influence
high
humidity
particle
pollutants
in
gas.
Due
gradient
variation
interface
increasing
pressure,
exhibits
multi‐stage
linear
sensitivity
response
trend,
which
has
pressure
0.048
kPa
−1
.
In
addition,
further
integrated
smart
mask
for
real‐time
status,
including
age
gender
subjects,
physical
activity
sleep
apnea
syndrome.
This
work
provides
effective
sensing
strategy
daily
monitoring,
proactive
healthcare,
early
disease
warning.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Jan. 18, 2024
Abstract
Respiration
stands
as
a
vital
process
reflecting
physiological
and
pathological
human
health
status.
Exhaled
breath
analysis
offers
facile,
non-invasive,
swift,
cost-effective
approach
for
diagnosing
monitoring
diseases
by
detecting
concentration
changes
of
specific
biomarkers.
In
this
study,
we
employed
Polyethylene
oxide/copper
(I)
oxide
composite
nanofibers
(PCNFs),
synthesized
via
the
electrospinning
method
sensing
material
to
measure
ethanol
levels
(1–200
ppm)
in
an
exhaled
simulator
environment.
The
integrated
contact-separation
triboelectric
nanogenerator
was
utilized
power
self-powered
PCNFs
sensor.
PCNFs-based
gas
sensor
demonstrates
promising
results
with
values
0.9
3.2
5
ppm
200
ethanol,
respectively,
presence
interfering
at
90%
relative
humidity
(RH).
Notably,
displayed
remarkable
selectivity,
ratios
10:1
methanol
25:1
acetone.
Response
recovery
times
90
RH%
were
rapid,
2.7
s
5.8
s,
respectively.
demonstrated
consistent
stable
performance
practical
conditions,
showcasing
its
potential
integration
into
wearable
devices.
This
enabling
continuous
lung
cancer
symptoms
facilitating
compliance
checks
legal
alcohol
consumption
limits.
Sensors,
Journal Year:
2023,
Volume and Issue:
23(20), P. 8648 - 8648
Published: Oct. 23, 2023
With
a
rising
emphasis
on
public
safety
and
quality
of
life,
there
is
an
urgent
need
to
ensure
optimal
air
quality,
both
indoors
outdoors.
Detecting
toxic
gaseous
compounds
plays
pivotal
role
in
shaping
our
sustainable
future.
This
review
aims
elucidate
the
advancements
smart
wearable
(nano)sensors
for
monitoring
harmful
pollutants,
such
as
ammonia
(NH3),
nitric
oxide
(NO),
nitrous
(N2O),
nitrogen
dioxide
(NO2),
carbon
monoxide
(CO),
(CO2),
hydrogen
sulfide
(H2S),
sulfur
(SO2),
ozone
(O3),
hydrocarbons
(CxHy),
fluoride
(HF).
Differentiating
this
from
its
predecessors,
we
shed
light
challenges
faced
enhancing
sensor
performance
offer
deep
dive
into
evolution
sensing
materials,
substrates,
electrodes,
types
sensors.
Noteworthy
materials
robust
detection
systems
encompass
2D
nanostructures,
nanomaterials,
conducting
polymers,
nanohybrids,
metal
semiconductors.
A
dedicated
section
dissects
significance
circuit
integration,
miniaturization,
real-time
sensing,
repeatability,
reusability,
power
efficiency,
gas-sensitive
material
deposition,
selectivity,
sensitivity,
stability,
response/recovery
time,
pinpointing
gaps
current
knowledge
offering
avenues
further
research.
To
conclude,
provide
insights
suggestions
prospective
trajectory
nanosensors
addressing
extant
challenges.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 8, 2024
Abstract
With
the
continuous
acceleration
of
industrialization,
gas
sensors
are
evolving
to
become
portable,
wearable
and
environmentally
friendly.
However,
traditional
rely
on
external
power
supply,
which
severely
limits
their
applications
in
various
industries.
As
an
innovative
adaptable
generation
technology,
triboelectric
nanogenerators
(TENGs)
can
be
integrated
with
leverage
benefits
both
technologies
for
efficient
friendly
self‐powered
sensing.
This
paper
delves
into
basic
principles
current
research
frontiers
TENG‐based
sensor,
focusing
particularly
environmental
safety
monitoring,
healthcare,
as
well
emerging
fields
such
food
assurance
smart
agriculture.
It
emphasizes
significant
advantages
sensor
systems
promoting
sustainability,
achieving
sensing
at
room
temperature,
driving
technological
innovations
devices.
also
objectively
analyzes
technical
challenges,
including
issues
related
performance
enhancement,
theoretical
refinement,
application
expansion,
provides
targeted
strategies
future
directions
aimed
paving
way
progress
widespread
field
sensors.
ACS Sensors,
Journal Year:
2024,
Volume and Issue:
9(6), P. 3126 - 3136
Published: June 6, 2024
Given
the
widespread
utilization
of
gas
sensors
across
various
industries,
detection
diverse
and
complex
target
gases
presents
a
significant
challenge
in
designing
with
multigas
capability.
Although
constructing
sensor
array
widely
used
chemiresistive
is
one
solution,
it
difficult
for
single
to
simultaneously
detect
different
gases,
as
can
only
gas.
The
intrinsic
reason
this
bottleneck
that
rely
entirely
on
resistivity
unique
parameter
evaluate
sensing
properties
sensors,
such
sensitivity,
selectivity,
etc.
Herein,
field-effect
transistor
(FET)
abundant
electrical
parameters
employed
prepare
variety
gases.
Semiconducting
carbon
nanotubes
(CNTs)
are
selected
channel
material,
which
modified
by
Pd
nanoparticles
enhance
sensors.
By
extracting
transconductance,
threshold
voltage,
from
transfer
characteristic
curves
FET,
correlation
between
multielectrical
information
established
subsequent
data
analysis.
Through
principal
component
analysis
algorithm,
identification
six
be
finally
achieved
relying
solely
carbon-based
FET-type
sensor.
We
hope
our
work
solve
principle
expected
reduce
system
complexity
cost
caused
design
arrays,
offering
valuable
guidance
technology.
