IEEE Sensors Letters,
Journal Year:
2023,
Volume and Issue:
7(11), P. 1 - 4
Published: Oct. 11, 2023
Pencil-on-paper
electronics
has
gained
growing
interests
as
cost-effective,
ecofriendly,
flexible,
and
light-weight
devices
for
various
applications.
In
this
letter,
a
flexible
keypad
employing
pencil-on-paper
capacitive
touch
sensors
is
presented.
Spiral-type
interdigitated
are
interconnected
via
steel
threads
well
graphite
paths
to
constitute
ten-button
keypad.
Passivation
of
the
by
means
acrylic
paint
coating
works
protection
against
deterioration
from
bending,
folding,
extended
usage.
Backing
with
silicone
provides
extra
durability.
Sensor
reading
administered
Arduino
boards.
The
same
manufacturing
method
used
scale
up
system
44-button
keyboard.
Functionalities
both
systems
successfully
demonstrated,
effectiveness
passivation
verified.
This
review
delves
into
the
growing
field
of
flexible
and
stretchable
strain
sensors
utilized
in
human
gait
analysis,
focusing
on
determining
knee
bending
angle
muscle
activities
when
a
subject
walks.
Recent
advancements
have
enabled
these
to
accurately
capture
biomechanical
parameters
while
accommodating
body's
natural
movements.
We
examine
principles
underlying
sensors'
design
fabrication
techniques,
emphasizing
their
flexibility,
stretchability,
biocompatibility
for
seamless
integration
wearable
systems.
Through
critical
evaluation
existing
methodologies,
we
assess
reliability
validity
quantifying
parameters.
Furthermore,
discuss
this
technology's
clinical
research
implications,
highlighting
its
potential
personalized
rehabilitation
sports
performance
optimization.
provide
an
overview
application
analyzing
walking
gait,
especially
observing
programs.
First,
present
basic
working
various
sensors.
Second,
by
as
monitoring.
Finally,
current
challenges
future
opportunities
area
are
discussed.
By
synthesizing
knowledge
outlining
directions,
aims
insights
researchers
practitioners
seeking
leverage
comprehensive
analysis.
IEEE Sensors Journal,
Journal Year:
2024,
Volume and Issue:
24(11), P. 17441 - 17451
Published: April 18, 2024
Conflicts
between
the
existing
temperature-resistant
ink
and
printing
window
currently
prevent
electrohydrodynamic
(EHD)
printed
thin
film
temperature
sensors
from
achieving
both
fine
line
width
a
higher
measurement
limit
simultaneously.
In
this
study,
we
propose
method
to
adjust
AgNPs
prepare
with
micro
dimensions
enhanced
capabilities.
The
involves
leveraging
solubility
of
Polyester
resins
(PR)
in
alcohol-ether
solvent
incorporate
PR
into
nano-silver
solution
same
system.
This
allows
for
easy
while
utilizing
properties
anchor
conductive
networks.
AgNPs/PR
sensitive
layer
has
an
area
less
than
800
μm×800
μm,
average
under
50
μm
thickness
approximately
700
nm.
unencapsulated
demonstrates
long-term
conductivity
at
400°C,
maintaining
its
structural
integrity.
Furthermore,
performance
test
results
indicate
that
without
encapsulation
have
upper
but
they
are
susceptible
oxidation
drift
temperature.
To
eliminate
oxidation,
SiO
2
is
prepared.
Experimental
demonstrate
achieve
407°C.
At
temperature,
resistance
rate
-0.0496%
per
hour.
After
three
rounds
testing,
change
sensor
100°C
was
-0.281%.
successful
fabrication
using
EHD
suggests
potential
applications
high-density
sensing
requirements.
IEEE Sensors Journal,
Journal Year:
2024,
Volume and Issue:
24(10), P. 16774 - 16781
Published: May 15, 2024
Monitoring
the
temperature
changes
around
artificial
knee
joint
is
of
great
significance
for
diagnosing
periprosthetic
infection
after
total
arthroplasty.
A
comprehensive
diagnosis
relies
on
in-situ
and
multi-node
monitoring
key
components.
To
achieve
long-term
multiple
locations
joint,
we
propose
an
implantable
passive
wireless
LC
sensor
capable
achieving
three-node
noninterference
monitoring.
By
interrogating
resonant
frequency
Q
factor
in
real-time,
it
beneficial
to
realize
situ
positions
joint.
In
our
experiments,
fabricated
a
single
based
polyimide
substrate
demonstrated
that
measured
temperatures
three
nodes
are
independent
each
other.
The
average
sensitivities
-30KHz/°C,
-26.6KHz/°C,
0.078
Ω/°C
respectively
from
36°C
50°C.
And
resolutions
0.187
°C,
0.14
°C
0.258
respectively.
This
method
paves
way
implanting
sensors,
where
sensing
able
provide
more
reliable
judgments
medical
diagnosis.
addition,
proposal
can
be
extended
measurement
other
parameters
interest.
The
escalating
global
issue
of
municipal
solid
waste
poses
a
significant
threat
to
both
the
environment
and
human
well-being.
Recycling
facilities
are
limited,
landfills
rapidly
accumulating
discarded
materials,
leading
environmental
degradation
release
greenhouse
gases.
Concurrently,
demand
for
sustainable
power
sources
remains
critical
challenge
due
frequent
replacement
conventional
batteries
increasing
portable
electronics.
To
cater
this
challenge,
triboelectric
nanogenerators
(TENGs)
present
promising
alternative
source
through
energy
harvesting.
In
study,
we
propose
an
approach
address
management
generation
concerns
by
introducing
low-cost
TENG,
utilizing
recycled
household
like
rubber
cardboard.
cardboard-based
nanogenerator
(RCB-TENG)
harnesses
potential
readily
available
waste,
making
it
cost-effective,
facile
solution
generating
electrical
RCB-TENG
can
produce
V
oc
,
I
xmlns:xlink="http://www.w3.org/1999/xlink">sc
maximum
output
11.13
V,
3.2
μA
4.096
μW,
respectively.
Through
endeavour,
aim
contribute
towards
mitigation
while
simultaneously
providing
practical
generation.
Wearable
sensors
have
gained
a
significant
role
in
our
daily
life
and
become
fundamental
part
of
human
existence.
These
provided
convenient
way
by
which
we
can
simultaneously
deal
with
health
everyday
life.
The
wearable
textile-based
are
lightweight
be
utilized
for
analyzing
the
vital
signs,
such
as
respiration
count,
body
temperature,
blood
oxygen
metrics
living
beings.
In
this
work,
facile
temperature
sensor
is
proposed.
motivation
behind
work
to
design
fabricate
flexible
easily
used
needy
individuals.
was
fabricated
on
common
household
jeans
fabric,
while
commonly
available
conductive
copper
wire
electrode
sensor.
An
exceptionally
straightforward
low-cost
stitching
procedure
manufacture
A
simple
embroidery
technique
were
thread.
After
fabrication
sensor,
its
resistive
response
analyzed
NI
ELVIS
board
at
various
temperatures
including
temperature.
proposed
textile
based
monitoring.
Paper-based
electronics
are
gaining
popularity
for
their
affordability,
abundant
availability
in
household
settings,
biodegradability,
recyclability,
disposability,
facile
fabrication,
eco-friendliness,
and
sustainability.
This
aligns
with
the
UN's
Sustainable
Development
Goals,
promoting
sustainable,
responsible,
environmentally
conscious
production
practices.
Given
current
economic
pandemic
scenario,
which
restricts
students'
access
to
traditional
physical
labs,
there
is
a
pressing
need
develop
cost-effective,
do-it-yourself
(DIY),
eco-friendly
sustainable
electronic
solutions
remote
learning
from
home.
study
introduces
an
economical
DIY
approach
wherein
graphite
pencil
drawn
resistor
copper
tape
capacitor
integrated
74HC14
IC
on
paper
form
RC
oscillator
circuit.
The
IC,
acting
as
Schmitt
trigger,
exhibits
oscillatory
behavior
when
connected
bridge.
frequency
achieved
was
up
250
kHz.
Furthermore,
circuit's
tunability
demonstrated
by
varying
resistance
of
circuit
either
increasing
or
decreasing
flakes.
these
circuits
can
be
reused
recycled
again
performing
same
other
labs.
showcases
feasibility
practicality
making
home-based
laying
foundation
incorporating
basic
lab
experiments
substrates,
particularly
required
context.
not
only
addresses
immediate
but
also
sets
transformative
precedent
accessible
education.
