As
a
new
type
of
gas
sensor,
MXenes
material
is
great
significance
in
indoor
harmful
detection.
The
geometric,
electronic,
and
magnetic
properties
CH4
adsorbed
on
intact,
F-vacancy
defected,
transition-metal
(TMs:
Mn,
Co,
Ni,
Zn,
Nb,
Mo)
doped
V2CF2
have
been
investigated
based
density
functional
theory.
Perfect
defected
substrates
exhibited
low
charge
transfer,
long
adsorption
distance,
small
energy
for
CH4.
mechanism
was
physical
adsorption.
After
introducing
Co
Ni
dopants,
the
changed
to
be
chemisorption.
Additionally,
asymmetric
electron
spin
distribution
between
dopant
V
atom
caused
substrate
change
from
being
non-magnetic
magnetic,
as
shown
by
electronic
states
diagrams.
hybridization
TM-3d
orbitals
p
molecule
significantly
improved
stability.
It
hoped
that
results
could
provide
ideas
creating
sensors
MXenes.
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 27, 2025
In
order
to
verify
the
adsorption
effect
of
WTe2
on
fault
gas
power
transformer
winding
deformation,
this
paper
uses
density
functional
theory
(DFT)
study
and
compare
mechanism
sensing
characteristics
three
gases
(CO,
CO2,
C2H2)
surface
WSe2
substrates
after
cluster
doping
with
Crn
(n
=
1-3).
By
analyzing
binding
energy,
band
structure,
distance,
DCD
DOS
two
substrate
systems,
Cr
doped
is
compared.
Higher
stability
conductivity
indicate
that
beneficial
for
substrates.
CO
CO2
have
best
performance
among
systems
Cr2-WSe2,
while
C2H2
can
be
captured
by
Cr3-WTe2.
This
also
analyzes
work
function,
gap
energy
gap,
further
verifying
changes
described
in
previous
article.
addition,
recovery
time
sensitivity
are
used
discuss
practical
application
prospects
doping,
corresponding
conclusions
obtained.
provides
a
theoretical
basis
evaluating
preventing
deformation
failures
transformers,
new
insights
into
whether
as
mainstream
gas-sensitive
material
engineering
fields.
ACS Sensors,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 18, 2024
The
evaluation
of
selectivity/cross-sensitivity
is
one
the
most
important
tests
for
gas
sensor
development,
particularly
that
based
on
chemiresistive
technology.
It
known
sensors
suffer
from
low
selectivity
when
they
provide
sensitivity
to
several
analytes.
Typically,
testing
involves
independently
assessing
a
sensor's
response
specific
gas.
However,
there
growing
need
evaluate
performance
with
interfering
gases
or
mixtures
since
are
always
exposed
in
practice.
Despite
great
importance
characterization,
currently,
no
standard
methods
at
conditions
target
coexists
compounds,
which
mimics
real
conditions.
We
outlined
four
main
researchers
use
cross-sensitivity
sensors.
highlights
key
aspects
test
performance,
assessment
methodologies,
and
procedure
features,
attempting
classify
them
by
their
distinct
characteristics.
This
review
covers
essentials
properties,
adsorption
desorption
processes,
molecule
interactions.
Finally,
we
tried
address
lack
standardized
protocols
evaluating
sensors'
guide
researchers.
