Applied Physics Reviews,
Journal Year:
2024,
Volume and Issue:
11(4)
Published: Dec. 1, 2024
Identification
and
detection
of
toxic/explosive
environmental
gases
are
paramount
importance
to
various
sectors
such
as
oil/gas
industries,
defense,
industrial
processing,
civilian
security.
Surface
acoustic
wave
(SAW)-based
gas
sensors
have
recently
gained
significant
attention,
owing
their
desirable
sensitivity,
fast
response/recovery
time,
wireless
capabilities,
reliability.
For
detecting
types
targeted
gases,
SAW
with
different
device
structures
sensitive
materials
been
developed
diversified
working
mechanisms.
This
paper
is
focused
on
overviewing
recent
advances
in
mechanisms
theories
dominant
key
mechanisms/principles
for
targeting
the
realm
sensors.
The
basic
sensing
parameters
briefly
discussed,
then
major
influencing
factors
systematically
reviewed,
including
effects
layer
materials,
temperature/humidity,
UV
illumination
overall
performance
We
further
highlight
relationships
adsorption/desorption
principles
between
NH3,
NO2,
H2S,
explosive
H2,
2,4,6-trinitrotoluene,
organic
isopropanol,
ethanol,
acetone,
well
others
CO,
SO2,
HCl.
Finally,
we
discuss
challenges
future
outlooks
designing
methodologies
enhancing
sensors,
offering
fundamental
guidance
developing
good
performance.
Chemical Physics Impact,
Journal Year:
2024,
Volume and Issue:
8, P. 100616 - 100616
Published: April 23, 2024
The
NiFe2O4/rGO
nanocomposite
was
prepared
by
a
simple
impregnation
method
and
its
nanostructural
morphological
properties
were
characterized
using
XRD,
FTIR,
FESEM
EDX.
gas
sensors
constructed
pure
NiFe2O4
composite
samples
their
sensing
examined.
performances
of
measured
chemicapative
method.
sensitivity
values
are
1.3
1.7
for
samples,
respectively.
response/recovery
times
as-prepared
sample
100
ppm
ammonia
is
55
sec
40
sec,
chemically
reduced
rGO
shows
promise
as
supporting
material
the
advancement
next-generation
low-power,
portable
sensors.
Sensors,
Journal Year:
2024,
Volume and Issue:
24(17), P. 5469 - 5469
Published: Aug. 23, 2024
Buildings
worldwide
are
becoming
more
thermally
insulated,
and
air
circulation
is
being
reduced
to
a
minimum.
As
result,
measuring
indoor
quality
important
prevent
harmful
concentrations
of
various
gases
that
can
lead
safety
risks
health
problems.
To
measure
such
gases,
it
necessary
produce
low-cost
low-power-consuming
sensors.
Researchers
have
been
focusing
on
semiconducting
metal
oxide
(SMOx)
gas
sensors
be
combined
with
intelligent
technologies
as
smart
homes,
phones
or
watches
enable
sensing
anywhere
at
any
time.
type
SMOx,
p-type
promising
candidates
attracted
interest
in
recent
years
due
their
excellent
electrical
properties
stability.
This
review
paper
gives
short
overview
the
main
development
based
copper
oxides
composites,
highlighting
potential
for
detecting
CO2
factors
influencing
performance.
Langmuir,
Journal Year:
2024,
Volume and Issue:
40(21), P. 10966 - 10979
Published: May 15, 2024
Suitable
functional
group-engineered
π-conjugated
aromatic
dimides
based
on
perylene
(PDI)
and
naphthyl
scaffolds
(NDI)
demonstrated
excellent
sensitivity
toward
different
gaseous
analytes.
However,
to
date,
no
methodical
analysis
has
been
performed
rationalize
molecular-level
interactions
in
the
context
of
optical
transduction,
which
is
essential
for
systematic
performance
optimization
NDI/PDI-based
molecular
sensors.
Therefore,
this
present
work,
NDI/PDI
have
designed
with
amino
acid
groups
(alanine,
ALA
glutamic
acid,
GLU)
at
terminal
positions,
we
subsequently
compared
efficacy
four
imide
derivatives
as
model
hosts
hydrazine
adsorption.
Specifically,
adsorption
interaction
sites
thoroughly
investigated
using
ab
initio
calculations,
where
energy,
charge
transfer,
recovery
time
emphasized.
Theoretical
results
exhibit
that
irrespective
host
specification
COOH
offer
a
primary
site
through
hydrogen
bonding
interaction.
The
presence
more
relatively
stronger
secondary
edge
oxygen
ensure
GLU
moieties
are
superior
choice
over
ALU
efficient
binding.
energy
spectrum
exhibits
favorable
HOMO/LUMO
gap
variations
after
case
PDI
nature
residues.
by
combination
both
factors,
PDI-GLU
identified
most
suitable
molecule
among
derivatives.
Finally,
key
theoretical
predictions
later
experimentally
validated
analyzing
UV–visible
spectroscopy
NMR
studies,
wherein
mechanism
also
verified
EPR
FT-IR
studies.
