Gas
detection
has
become
a
popular
research
topic
in
the
field
of
environmental
protection
and
disease
because
concerning
increase
pollution
human
health
problems.
2D
MXenes
are
promising
candidates
for
room-temperature
gas
sensors
their
flexible
adjustable
material
compositions,
high
conductivities,
signal-to-noise
ratios,
surface
terminations.
This
paper
presents
prospects
sensors,
structure
MXenes,
potential
sensing
mechanisms
MXenes-based
sensors.
Applications
Ti3C2Tx,
V2CTx,
Nb2CTx,
Mo2CTx
different
gases
reviewed,
challenges
directions
applying
discussed.
review
provides
ideas
designing
novel
sensitive
materials
by
analyzing
value
sensor
field.
Accounts of Chemical Research,
Год журнала:
2024,
Номер
57(16), С. 2395 - 2413
Опубликована: Авг. 5, 2024
ConspectusGas
sensors
are
used
in
various
applications
to
sense
toxic
gases,
mainly
for
enhanced
safety.
Resistive
particularly
popular
owing
their
ability
detect
trace
amounts
of
high
stability,
fast
response
times,
and
affordability.
Semiconducting
metal
oxides
commonly
employed
the
fabrication
resistive
gas
sensors.
However,
these
often
require
working
temperatures,
bringing
about
increased
energy
consumption
reduced
selectivity.
Furthermore,
they
do
not
have
enough
flexibility,
performance
is
significantly
decreased
under
bending,
stretching,
or
twisting.
To
address
challenges,
alternative
materials
capable
operating
at
lower
temperatures
with
flexibility
needed.
Two-dimensional
(2D)
such
as
MXenes
transition-metal
dichalcogenides
(TMDs)
offer
surface
area
conductivity
unique
2D
structure,
making
them
promising
candidates
realization
Nevertheless,
sensing
pristine
form
typically
weak
unacceptable,
terms
response,
selectivity,
recovery
time
(
ACS Sensors,
Год журнала:
2024,
Номер
9(6), С. 3085 - 3095
Опубликована: Июнь 6, 2024
Wearable
gas
sensors
have
drawn
great
attention
for
potential
applications
in
health
monitoring,
minienvironment
detection,
and
advanced
soft
electronic
noses.
However,
it
still
remains
a
challenge
to
simultaneously
achieve
excellent
flexibility,
high
sensitivity,
robustness,
permeability,
because
of
the
inherent
limitation
widely
used
traditional
organic
flexible
substrates.
Herein,
an
electrospinning
polyacrylonitrile
(PAN)
nanofiber
network
was
designed
as
substrate,
on
which
ultraflexible
wearable
sensor
prepared
with
situ
assembled
polyaniline
(PANI)
multiwalled
carbon
nanotubes
(MWCNTs)
sensitive
layer.
The
unique
strong
binding
force
between
substrate
sensing
materials
endow
permeability.
can
maintain
stable
NH3
performance
while
sustaining
extreme
bending
stretching
(50%
strain).
Young's
modulus
PAN/MWCNTs/PANI
is
low
18.9
MPa,
several
orders
magnitude
smaller
than
those
reported
sensors.
water
vapor
transmission
rate
0.38
g/(cm2
24
h),
enables
wearing
comfort
sensor.
Most
importantly,
due
effective
exposure
sites
well
heterostructure
effect
MWCNTs
PANI,
shows
sensitivity
at
room
temperature,
theoretical
limit
detection
300
ppb.
This
work
provides
new
avenue
realization
reliable
high-performance
Biosensors,
Год журнала:
2024,
Номер
14(10), С. 497 - 497
Опубликована: Окт. 12, 2024
Owing
to
their
unique
physicochemical
properties,
MXenes
have
emerged
as
promising
materials
for
biosensing
applications.
This
review
paper
comprehensively
explores
the
recent
advancements
in
MXene-based
biosensors
health
and
environmental
begins
with
an
introduction
biosensors,
outlining
various
types
of
including
electrochemical,
enzymatic,
optical,
fluorescent-based
systems.
The
synthesis
methods
characteristics
are
thoroughly
discussed,
highlighting
importance
these
processes
tailoring
specific
Particular
attention
is
given
development
electrochemical
which
shown
remarkable
sensitivity
selectivity
detecting
analytes.
then
delves
into
enzymatic
exploring
how
integration
enzymes
enhances
sensor
performance
expands
range
detectable
biomarkers.
Optical
based
on
examined,
focusing
mechanisms
applications
both
healthcare
monitoring.
potential
MXene
also
investigated,
showcasing
utility
imaging
sensing
In
addition,
wearable
been
discussed
along
role
volatile
organic
compound
(VOC)
detection
Finally,
this
concludes
a
critical
analysis
current
state
provides
insights
future
perspectives
challenges
rapidly
evolving
field.
A
composite
of
sulfur
nanosheets
(S-NSs)
with
hydrophobic
carbon
nanotubes
(H-CNTs)
was
designed,
and
a
chemiresistive
gas
sensor
based
on
this
material
constructed
for
breath
analysis
NH3
detection
at
room
temperature.
Taking
advantage
the
capillary
condensation
CNTs,
effect
hexadecyltrimethoxysilane
(HDTMS),
high
sensitivity
S-NSs
to
detection,
showed
an
improved
humidity-resistant
capacity
is
capable
detecting
breath-relevant
concentrations
down
ppb
level
under
humidity.
The
fabricated
exhibited
fast
response/recovery
(18/26
s)
good
stability.
Online
monitoring
exhaled
shows
recovery
stable
baseline,
providing
potential
practical
application.
research
also
facilitates
development
commercial
low-cost
sensors.
