Advanced Materials Technologies,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 14, 2025
Abstract
Droplet‐based
electricity
generators
(DEGs)
harness
liquid‐solid
electrification
to
convert
water
droplets
impacts
into
electrical
energy.
This
study
systematically
examines
how
droplet
height,
volume,
flow
rate,
and
substrate
tilt
angle
influence
DEG
performance
using
polytetrafluoroethylene
(PTFE)
as
a
triboelectric
layer
deionized
water.
Three
electrode
designs
(double,
top,
bottom)
are
evaluated,
revealing
that
the
double‐electrode
configuration
delivers
highest
output.
enhanced
arises
from
synergistic
motion,
double‐layer
formation,
charge
discharge,
validated
by
an
equivalent
circuit
model.
By
varying
heights
1–20
cm,
volumes
of
7.7–50
µL,
rates
50–300
drops/min,
angles
0–90°,
optimized
setup
yields
−70
V
22
mA,
translating
power
density
0.28
µW
cm
−2
.
High‐speed
imaging
correlates
these
outputs
with
impact
dynamics
resulting
transfer.
Additionally,
can
small
electronic
devices,
capacitors,
monitor
artificial
acid
rain
in
real‐time,
displaying
distinct
signals
compared
typical
rainwater.
These
findings
underscore
potential
DEGs
renewable
energy
harvesters
smart
environmental
sensors,
paving
way
for
advanced
on‐demand
generation
diverse
settings.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(9), P. 6125 - 6133
Published: Feb. 7, 2024
Chemical
analysis
of
ions
and
small
organic
molecules
in
liquid
samples
is
crucial
for
applications
chemistry,
biology,
environmental
sciences,
health
monitoring.
Mainstream
electrochemical
chromatographic
techniques
often
suffer
from
complex
lengthy
sample
preparation
testing
procedures
require
either
bulky
or
expensive
instrumentation.
Here,
we
combine
triboelectrification
charge
transfer
on
the
surface
electrical
insulators
to
demonstrate
concept
triboelectric
spectroscopy
(TES)
chemical
analysis.
As
a
drop
slides
along
an
insulating
reclined
plane,
local
recorded,
pattern
trajectory
used
build
fingerprinting
spectroscopy.
information
extracted
enables
new
nondestructive
ultrafast
(<1
s)
tool
TES
profiles
are
unique,
through
automated
identification,
it
possible
match
against
standard
hence
detect
over
30
types
common
salts,
acids,
bases
molecules.
The
qualitative
quantitative
accuracies
methodology
close
93%,
detection
limit
as
low
ppb
levels.
Instruments
portable
can
be
further
miniaturized,
opening
path
situ
rapid
relying
inexpensive,
low-tech
Small,
Journal Year:
2024,
Volume and Issue:
20(31)
Published: March 6, 2024
Abstract
Triboelectric
nanogenerator
(TENG)
is
a
promising
solution
to
harvest
the
low‐frequency,
low‐actuation‐force,
and
high‐entropy
droplet
energy.
Conventional
attempts
mainly
focus
on
maximizing
electrostatic
energy
liquid‐solid
surface,
but
enormous
kinetic
of
hitting
substrate
directly
dissipated,
limiting
output
performance.
Here,
dual‐mode
TENG
(DM‐TENG)
proposed
efficiently
both
at
surface
from
(D‐TENG)
elastic
potential
vibrated
cantilever
contact‐separation
(CS‐TENG).
Triggered
by
small
droplets,
flexible
beam,
rather
than
conventional
stiff
ones,
can
easily
vibrate
multiple
times
with
large
amplitude,
enabling
frequency
multiplication
CS‐TENG
producing
amplified
charges.
Combining
top
electrode
design
sufficiently
utilize
charges
interface,
record‐high
charge
158
nC
realized
single
droplet.
The
conversion
efficiency
DM‐TENG
2.66‐fold
D‐TENG.
An
array
system
specially
designed
power
management
circuit
also
demonstrated
for
building
self‐powered
system,
offering
applications
harvesting
raindrop
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 30, 2024
Abstract
Drawing
inspiration
from
nature
has
served
as
a
crucial
driving
force
behind
human
progress,
enabling
groundbreaking
advancements
and
cross‐disciplinary
integration
through
the
emulation
of
biological
superhydrophobic
phenomena.
Bioinspired
triboelectric
materials
stand
out
among
advanced
due
to
their
unique
hydrophobic
properties,
exceptional
moisture
resistance,
remarkable
electrical
performance.
However,
inherent
complexity
natural
phenomena
need
for
refinement
in
bioinspired
design
pose
significant
challenges
development
materials.
This
comprehensive
review
delves
into
perspectives
theoretical
underpinnings,
fabrication
strategies,
cutting‐edge
applications.
Rooted
interaction
mechanisms
between
water
molecules
materials,
importance
enhanced
properties
is
elucidated.
A
systematic
overview
materials’
construction
strategies
presented,
offering
fresh
insights
application
high‐performance
nanogenerators
(TENGs).
Finally,
current
untapped
opportunities
are
summarized
fully
unlock
potential
applications
TENGs.
Advanced Materials Technologies,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 14, 2025
Abstract
Droplet‐based
electricity
generators
(DEGs)
harness
liquid‐solid
electrification
to
convert
water
droplets
impacts
into
electrical
energy.
This
study
systematically
examines
how
droplet
height,
volume,
flow
rate,
and
substrate
tilt
angle
influence
DEG
performance
using
polytetrafluoroethylene
(PTFE)
as
a
triboelectric
layer
deionized
water.
Three
electrode
designs
(double,
top,
bottom)
are
evaluated,
revealing
that
the
double‐electrode
configuration
delivers
highest
output.
enhanced
arises
from
synergistic
motion,
double‐layer
formation,
charge
discharge,
validated
by
an
equivalent
circuit
model.
By
varying
heights
1–20
cm,
volumes
of
7.7–50
µL,
rates
50–300
drops/min,
angles
0–90°,
optimized
setup
yields
−70
V
22
mA,
translating
power
density
0.28
µW
cm
−2
.
High‐speed
imaging
correlates
these
outputs
with
impact
dynamics
resulting
transfer.
Additionally,
can
small
electronic
devices,
capacitors,
monitor
artificial
acid
rain
in
real‐time,
displaying
distinct
signals
compared
typical
rainwater.
These
findings
underscore
potential
DEGs
renewable
energy
harvesters
smart
environmental
sensors,
paving
way
for
advanced
on‐demand
generation
diverse
settings.
