Moisture-electric
generators
(MEGs)
generate
power
by
adsorbing
water
from
the
air.
However,
their
performance
at
low
temperatures
is
hindered
due
to
icing.
In
present
work,
MEG
arrays
are
developed
laser
engraving
techniques
and
a
modulated
low-temperature
hydrogel
as
absorbent
material.
LTH
effectively
captures
moisture
maintains
ion
dissociation
migration
even
subzero
temperatures.
Based
on
double
electric
layer
pseudocapacitance
model,
oscillating
circuit
theory
introduced
explain
effects
of
absorption,
evaporation,
output
current
MEG,
calculations
matched
with
experimental
results.
Molecular
dynamics
simulations
indicate
that
LTH's
stability
results
preferential
hydrogen
bonding
between
glycerol
molecules
H2O,
which
disrupts
H2O–H2O
bonds
slows
crystallization.
A
single
unit
(0.25
cm2)
can
produce
up
∼0.8
V
∼21.2
μW/cm2
room
temperature,
−35
°C
16%
RH,
it
generates
∼0.58
∼14.35
μA.
realizes
following
applications:
successfully
drives
electronic
devices
in
snow;
16
MEGs
portable
electronics,
384
achieve
210
V;
absorbs
LEDs
blowing
up;
has
flexible
wearable
nature;
used
for
respiratory
monitoring
photoelectric
sensors.
Chemical Reviews,
Год журнала:
2021,
Номер
122(5), С. 5209 - 5232
Опубликована: Июнь 23, 2021
Interfaces
between
a
liquid
and
solid
(L-S)
are
the
most
important
surface
science
in
chemistry,
catalysis,
energy,
even
biology.
Formation
of
an
electric
double
layer
(EDL)
at
L-S
interface
has
been
attributed
due
to
adsorption
ions
surface,
which
causes
redistribute.
Although
existence
charges
on
is
always
assumed,
origin
not
extensively
explored.
Recent
studies
contact
electrification
(CE)
suggest
that
electron
transfer
plays
dominant
role
initial
stage
for
forming
charge
interface.
Here,
we
review
recent
works
about
liquid-solid
CE,
including
scenerios
such
as
liquid-insulator,
liquid-semiconductor,
liquid-metal.
EDL
revisited
considering
Furthermore,
triboelectric
nanogenerator
(TENG)
technique
based
CE
introduced,
can
be
used
only
harvesting
mechanical
energy
from
but
also
probe
probing
interfaces.
Reports on Progress in Physics,
Год журнала:
2021,
Номер
84(9), С. 096502 - 096502
Опубликована: Июнь 10, 2021
Although
the
contact
electrification
(CE)
(or
usually
called
'triboelectrification')
effect
has
been
known
for
over
2600
years,
its
scientific
mechanism
still
remains
debated
after
decades.
Interest
in
studying
CE
recently
revisited
due
to
invention
of
triboelectric
nanogenerators
(TENGs),
which
are
most
effective
approach
converting
random,
low-frequency
mechanical
energy
(called
high
entropy
energy)
into
electric
power
distributed
applications.
This
review
is
composed
three
parts
that
coherently
linked,
ranging
from
basic
physics,
through
classical
electrodynamics,
technological
advances
and
engineering
First,
mechanisms
studied
general
cases
involving
solids,
liquids
gas
phases.
Various
physics
models
presented
explain
fundamentals
by
illustrating
electron
transfer
dominant
solid-solid
interfaces.
Electron
also
occurs
at
liquid-solid
liquid-liquid
An
electron-cloud
overlap
model
proposed
general.
extended
interfaces,
leading
a
revision
formation
double
layer
Second,
adding
time-dependent
polarization
term
Advanced Materials,
Год журнала:
2021,
Номер
33(44)
Опубликована: Сен. 12, 2021
Laser-induced
graphene
(LIG)
has
emerged
as
a
promising
and
versatile
method
for
high-throughput
patterning;
however,
its
full
potential
in
creating
complex
structures
devices
practical
applications
is
yet
to
be
explored.
In
this
study,
an
in-situ
growing
LIG
process
that
enables
pattern
superhydrophobic
fluorine-doped
on
fluorinated
ethylene
propylene
(FEP)-coated
polyimide
(PI)
demonstrated.
This
leverages
distinct
spectral
responses
of
FEP
PI
during
laser
excitation
generate
the
environment
preferentially
formation,
eliminating
need
multistep
processes
specific
atmospheres.
The
structured
water-repellant
rendered
by
spectral-tuned
interfacial
are
suitable
electrode
construction
flexible
droplet-based
electricity
generator
(DEG),
which
exhibits
high
power
conversion
efficiency,
generating
peak
density
47.5
W
m-2
from
impact
water
droplet
105
µL
height
25
cm.
Importantly,
device
superior
cyclability
operational
stability
under
humidity
various
pH
conditions.
facile
developed
can
extended
realize
functional
devices.
Nature Communications,
Год журнала:
2022,
Номер
13(1)
Опубликована: Янв. 10, 2022
Mechanochemistry
has
been
studied
for
some
time,
but
research
on
the
reactivity
of
charges
exchanged
by
contact-electrification
(CE)
during
mechanical
stimulation
remains
scarce.
Here,
we
demonstrate
that
electrons
transferred
CE
between
pristine
dielectric
powders
and
water
can
be
utilized
to
directly
catalyze
reactions
without
use
conventional
catalysts.
Specifically,
frequent
at
Fluorinated
Ethylene
Propylene
(FEP)
-
interface
induces
electron-exchanges,
thus
forming
reactive
oxygen
species
degradation
an
aqueous
methyl
orange
solution.
Contact-electro-catalysis,
conjunction
CE,
mechanochemistry
catalysis,
proposed
as
a
general
mechanism,
which
demonstrated
effective
various
materials,
such
Teflon,
Nylon-6,6
rubber.
This
original
catalytic
principle
not
only
expands
range
also
enables
us
envisage
processes
through
mechano-induced
contact-electrification.
Droplet,
Год журнала:
2022,
Номер
1(1), С. 11 - 37
Опубликована: Июль 1, 2022
Abstract
Droplet
manipulation
techniques
such
as
transport
and
merging
have
been
widely
used
in
many
fields
including
biology,
chemistry,
material
energy
applications.
Moreover,
droplet
strategies
extensively
investigated
reviewed
terms
of
placement
on
solid
surfaces.
However,
less
attention
has
paid
to
the
practice
technology
other
environments,
limiting
our
understanding
broadening
application.
In
this
article,
we
provided
an
overview
recent
progress
controlling
droplets
various
situations,
a
surface
mediated
by
passive
strategy
(Laplace
pressure
wettability
gradients)
active
(electric
field,
magnetic
light
heat).
We
also
presented
principle
detailed
application
bionic
surfaces
manipulation,
applications
prospects
were
summarized.
ACS Nano,
Год журнала:
2021,
Номер
15(9), С. 14830 - 14837
Опубликована: Авг. 20, 2021
The
phenomenon
of
triboelectricity
involves
the
flow
charged
species
across
an
interface,
but
conclusively
establishing
nature
charge
transfer
has
proven
extremely
difficult,
especially
for
liquid–solid
cases.
Herein,
we
developed
a
self-powered
droplet
triboelectric
nanogenerator
(droplet-TENG)
with
spatially
arranged
electrodes
as
probe
measuring
process
between
liquid
and
solid
interfaces.
information
on
electric
signal
shows
that
droplets
is
accumulation
during
dropping
electron
dominant
charge-transfer
species.
Such
droplet-TENG
showed
high
sensitivity
to
ratio
solvents
in
mixed
organic
solution,
postulated
this
due
possibility
generation
hydrogen
bond,
affecting
electrodes.
This
work
demonstrated
chemical
sensing
application
based
nanogenerator.
Droplet,
Год журнала:
2022,
Номер
1(1), С. 56 - 64
Опубликована: Июль 1, 2022
Abstract
The
past
several
years
have
witnessed
the
rapid
development
in
effectively
transforming
randomly
distributed
water
kinetic
energy
into
electrical
energy,
especially
triggered
by
emergence
of
droplet‐based
electricity
generators
(DEG).
Despite
this,
it
still
suffers
from
relatively
low
average
power
density,
which
is
also
achieved
at
cost
long
charging
time,
time
to
reach
stable
and
saturated
surface
charge
density
either
through
continuous
droplet
impingement
or
precharging.
Although
harvested
per
DEG
remains
as
dominant
metric,
ultrahigh
instantaneous
output
short
are
equally
important
some
specialized
applications
such
luminescence.
Here,
we
conduct
systematical
modeling
optimization
build
link
between
hydrodynamic
systems,
enables
us
determine
tailoring
parameters
dielectric
layer
thickness,
ion
concentration,
external
load.
We
envision
that
this
strategy
achieving
well
shortening
would
provide
insights
design
routes
for
harvesting.
