Advanced Materials Technologies,
Journal Year:
2024,
Volume and Issue:
9(18)
Published: July 17, 2024
Abstract
The
development
of
fast
and
strong
microactuators
that
can
be
integrated
in
microdevices
is
an
essential
challenge
due
to
a
lack
appropriate
driving
principles.
A
membrane
actuator
powered
by
internal
combustion
hydrogen
oxygen
chamber
with
volume
3.1
nanoliters
demonstrated.
such
small
possible
only
for
extremely
high
surface‐to‐volume
ratio
on
the
order
10
7
m
−1
.
fuel
this
prepared
electrochemically
special
regime
produces
nanobubbles.
cloud
nanobubbles
merges,
forming
microbubble,
which
explodes,
increasing
500×
µs.
generates
instantaneous
force
up
0.5
N
able
move
bodies
11
000×
more
massive
than
itself.
natural
response
time
≈10
ms
defined
incubation
needed
produce
exploding
bubble.
device
demonstrates
reliable
cyclic
actuation
at
frequency
1
Hz
restricted
effect
electrolyte
aging.
After
40
000
explosions,
no
significant
wear
observed.
Due
record‐breaking
acceleration
standard
microfabrication
techniques,
used
as
universal
engine
various
including
microelectromechanical
systems,
microfluidics,
microrobotics,
wearable
implantable
devices.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 9, 2024
Abstract
Microfluidics,
the
science
and
technology
of
manipulating
fluids
in
microscale
channels,
offers
numerous
advantages,
such
as
low
energy
consumption,
compact
device
size,
precise
control,
fast
reaction,
enhanced
portability.
These
benefits
have
led
to
applications
biomedical
assays,
disease
diagnostics,
drug
discovery,
neuroscience,
so
on.
Fluid
flow
within
microfluidic
channels
is
typically
laminar
region,
which
characterized
by
Reynolds
numbers
but
brings
challenge
efficient
mixing
fluids.
Periodic
flows
are
time‐dependent
fluid
flows,
featuring
repetitive
patterns
that
can
significantly
improve
extend
effective
length
microchannels
for
submicron
nanoparticle
manipulation.
Besides,
periodic
crucial
organ‐on‐a‐chip
(OoC)
accurately
modeling
physiological
processes,
advancing
understanding,
development,
personalized
medicine.
Various
techniques
generating
been
reported,
including
syringe
pumps,
peristalsis,
actuation
based
on
electric,
magnetic,
acoustic,
mechanical,
pneumatic,
fluidic
forces,
yet
comprehensive
reviews
this
topic
remain
limited.
This
paper
aims
provide
a
review
microfluidics,
from
fundamental
mechanisms
generation
applications.
The
challenges
future
perspectives
also
discussed
exploit
potential
microfluidics.
Lab on a Chip,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
This
review
highlights
recent
technological
advances
for
progress
in
particle
manipulation
under
X-force
fields,
and
forecasts
the
trajectory
of
future
developments.
Analytical Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 6, 2025
Double
emulsions
are
highly
structured
dispersion
systems
that
generate
double-layered
droplets.
offer
an
effective
platform
for
encapsulating
liquid
samples.
Multilayer
protection,
controlled
release
of
encapsulated
materials,
and
stability
make
double
superior
to
single
in
handling
sensitive
This
technology
is
widely
used
biology,
food
technology,
cosmetics,
environmental
sciences.
Microfluidic
emulsification
a
promising
method
producing
monodisperse
double-emulsion
droplets
with
high
encapsulation
efficiency.
Well-controlled
adjustment
the
core
size
shell
thickness
critical
applications
emulsions.
Changing
flow
rates
fluid
phases
most
straightforward
control
emulsion
sizes.
However,
double-emulsions
can
only
be
generated
within
small
range
rates.
Thus,
wide
without
changing
device
design
or
drastically
altering
properties
challenging.
Here,
we
demonstrate
facile
tunable
phases.
To
address
this
challenge,
developed
proof-of-concept
flexible
stretchable
microfluidic
capable
controlling
size,
thickness,
generation
frequency
by
adjusting
channel
dimensions
stretching
device.
We
incorporated
three
cases
assess
feasibility
process
emulsion.
demonstrated
increases
decreases
frequency.
Experimental
results
showed
∼84%
increase
volume
∼23%
applying
∼16%
strain.
innovative
approach
significantly
advances
field
droplet-based
microfluidics,
providing
on-site,
real-time
tunability
precision
reproducibility.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 2, 2024
Abstract
Room‐temperature
liquid
metal
droplets
(LMDs)
are
a
promising
material
for
various
applications
in
soft
robotics,
active
droplets,
and
biomedical
devices.
However,
controllable
high‐throughput
production
of
LMDs
remains
challenging
due
to
their
high
surface
tension
density.
Here,
novel
strategy
is
presented
produce
by
combining
electric
field‐induced
electrocapillary
flow
with
an
external
field.
The
basic
mechanism
that
the
induced
at
LMD/electrolyte
interface
forms
vortex
ring
electrolyte,
creating
hurricane‐like
effect
tube,
which
turn
causes
deform
eventually
pinch
off
into
small
droplets.
It
demonstrated
droplet
size
generation
frequency
can
be
controlled
precisely
adjusting
applied
current,
rate,
surfactant
concentration,
establishing
relationship
between
radius
experimental
parameters
through
dimensionless
analysis.
More
importantly,
this
handle
pendant
facilitate
programmable
patterning.
Leveraging
established
relationships,
flexible
control
over
spacing
during
patterning
attained.
Furthermore,
iontronic
pressure‐sensitive
device
based
on
hydrogel
developed
showcase
versatility
approach.
This
technique
opens
up
new
opportunities
fabricating
circuits,
composite
materials,
other
functional
devices
LMDs.
