Sensors,
Journal Year:
2024,
Volume and Issue:
24(23), P. 7777 - 7777
Published: Dec. 4, 2024
Gas
sensors
are
essential
measurement
devices
that
have
found
extensive
applications
across
various
fields,
including
industry,
agriculture,
ecological
and
environmental
monitoring,
military
operations,
biomedical
research.
Numerous
sensing
methods
based
on
a
diverse
range
of
principles-including
optics,
electrochemistry,
semiconductors-have
been
used
in
the
development
manufacture
gas
technologies.
However,
certain
gases
remains
challenging
when
using
current
techniques
sensors;
this
is
particularly
true
for
present
solid
media.
For
example,
nitrous
oxide
emitted
from
soil
often
trapped
within
pores,
while
significant
portion
ethylene
released
fruit
dissolves
flesh
itself.
Measurement
these
situations
poses
difficulties
conventional
methodologies.
To
enable
detection
elusive
gases,
scientists
engineers
devised
variety
specialized
approaches
over
past
two
decades.
In
review
article,
we
summarize
several
methods-including
extraction
techniques,
in-medium
scattering
spectroscopy,
use
micro-nano
probes-and
discuss
their
respective
advantages
disadvantages,
along
with
emerging
trends
techniques.
This
study
presents
the
development
and
characterization
of
a
smart
textile
gas
sensor
based
on
integration
ionic
liquid
(IL)-functionalized
Cu3(HHTP)2
metal–organic
frameworks
(MOFs),
using
electrohydrodynamic
jet
(e-jet)
printing.
The
was
designed
for
detection
nitric
oxide
(NO)
gas,
critical
target
in
various
environmental
safety
applications.
MOFs
were
synthesized
subsequently
functionalized
with
1-Ethyl-3-methylimidazolium
trifluoromethanesulfonate
(EMIM+
Otf–)
to
enhance
their
chemiresistive
performance
toward
NO
gas.
MOF
then
e-jet
printed
onto
electrospun
polylactic
acid
(PLA)
substrates
fabricate
sensors.
IL-functionalized
sensors
demonstrated
582×
increase
conductivity
compared
previously
reported
MOF-based
Additionally,
IL
functionalization
enhanced
sensitivity,
response
increasing
from
less
than
5%
pristine
MOF@PLA
approximately
570%
at
100
ppm
Performance
systematically
evaluated
across
concentrations
ranging
5
300
ppm,
achieving
theoretical
limit
3.7
ppm.
exhibited
partial
reversibility
retained
functionality
over
extended
periods
under
humid
conditions.
Comprehensive
analyses
SEM,
EDX,
FTIR,
XRD
performed
assess
crystallinity
deposits
elucidate
sensing
mechanism.
These
findings
highlight
potential
printing
advanced,
flexible
applications
both
civilian
military
settings
implications
personal
protective
wearable
technologies.
Chemosensors,
Journal Year:
2025,
Volume and Issue:
13(3), P. 100 - 100
Published: March 9, 2025
In
the
past
few
decades,
metal–organic
frameworks
(MOFs)
have
been
widely
employed
for
a
variety
of
applications
such
as
sensors,
adsorption,
and
catalysis.
MOFs
excellent
gas
sensing
properties
large
specific
surface
area
which
makes
them
suitable
candidate
determination
toxic
hazardous
gases.
Some
reports
also
shown
that
integration
with
other
materials
graphene,
metal
oxides,
or
conducting
polymers
may
further
improve
their
performance.
MOF-derived
demonstrated
properties.
this
review
article,
we
compiled
recent
progress
in
MOFs,
MOF-based
composites,
applications.
We
believe
present
article
benefit
readers
who
are
planning
working
on
development
sensors.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
Abstract
Flexible
sensing
electronics,
with
good
lightweight
and
flexibility,
can
maintain
excellent
capability
while
fitting
complex
curved
surfaces,
having
important
applications
in
wearable
devices,
medical
health
monitoring,
robotics.
The
rapid
advancement
of
metal‐organic
frameworks
(MOFs)
has
created
the
prospect
additional
improvements
flexible
sensors.
porous
structure
brings
them
a
high
specific
surface
area,
meaning
that
when
used
as
sensitive
materials
for
sensors,
sensitivity
selectivity
be
achieved.
Meanwhile,
performance
stability
MOF‐based
sensors
further
enhanced
by
modifying
MOFs’
or
compounding
other
materials,
which
is
crucial
manufacturing
utilized
working
conditions.
Herein,
MOFs
systematically
reviewed.
First,
common
series
MOFs,
preparation
modification
methods,
highly
conductive
are
introduced.
application
then
expounded,
including
self‐powered
mechanical
sensing,
gas
liquid
analyte
multi‐target/mode
sensing.
It
believed
better
response
capabilities
developed
processes
advance,
expected
to
more
widely
future
promote
development
technologies
such
human‐computer
interaction
technology.
ACS Applied Electronic Materials,
Journal Year:
2024,
Volume and Issue:
6(9), P. 6916 - 6931
Published: Aug. 23, 2024
A
facile
way
of
synthesizing
WS2
nanosheets
in
an
aqueous
solvent
and
fabrication
interdigitated
electrodes
(IDEs)
on
a
flexible
substrate
using
chemically
expanded
graphite
(CEG)
conductive
ink
has
been
reported
this
study.
The
synthesized
have
utilized
for
highly
sensitive
selective
ammonia
(NH3)
sensors
at
room
temperature
by
incorporating
polyaniline
(PANI)
with
the
nanosheets,
following
cost-effective
route.
IDEs
fabricated
photopaper
spray
coating
method.
resistance
is
comparable
to
standard
gold
copper
electrodes.
sensor
shows
enhanced
sensing
performance,
higher
response,
high
selectivity,
prolonged
stability,
low
detection
limit
3
ppm
experimentally
(≈9
ppb,
theoretically).
effect
relative
humidity
level
also
investigated.
response
recovery
times
5
NH3
vapor
are
found
be
38
58
s,
respectively.
remarkable
after
returning
from
bending
condition
relaxed
(normal)
position.
experimental
results
agree
density
functional
theory
(DFT)
analysis
that
performed
support
results.
electronic
charge
differences
WS2-PANI
nanocomposite
proximity
show
significant
variation
compared
other
interfering
volatile
organic
compounds
(VOCs).
In
addition,
mechanism
toward
discussed.
