Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 20, 2024
Abstract
Having
the
ability
to
attach
an
object
remote
surfaces
from
a
distance
can
be
useful
in
range
of
applications.
While
adhesive
technologies
have
advanced
significantly
and
are
used
various
ways,
including
medical
tools
robotics,
most
adhesives
like
tapes
or
glues
designed
directly
attached
physically
accessible
surfaces.
Here,
new
class
shootable
is
reported
that
deployed
dynamically
spread
out
mid‐air,
transforming
en‐route
into
wide,
thin
disk
shape
ideal
for
conformal
contact
diverse
surfaces,
angled,
stepped,
non‐planar
ones.
The
usability
reliability
this
approach
demonstrated
by
securely
affixing
functional
electronics,
such
as
GPS
units,
cameras,
communication
modules,
well
mechanical
wires,
inaccessible
shooting
distance.
Smart
surfaces
with
switchable
adhesion
have
garnered
significant
attention
in
wearable
devices,
robotics,
and
biological
detection.
However,
achieving
universal
at
both
solid
liquid
interfaces
is
still
challenging.
Here,
we
report
a
thermo-induced
biomimetic
slippery
interface
(TBSSI)
robust
adhesion,
inspired
by
octopus
tentacles
mussels.
Relying
on
femtosecond
laser
drilling
soft
PDMS
sheets
the
infusion
of
phase-change
paraffin,
smart
surface
TBSSI
fabricated.
Liquid
achieved
room
temperature,
while
through
phase
transition
paraffin
excited
Joule
heating,
exhibiting
strength
≈142
kPa.
Mechanical
abrasion
tests
demonstrate
exceptional
self-repairing
capability
excellent
retainability
strength.
This
work
should
provide
new
insights
into
designs
adhesive
advance
related
fields,
such
as
ultrafast
microfabrication
robotics.
The
question
of
how
long
an
object
can
adhere
to
a
surface
has
intrigued
scientists
for
centuries.
Traditional
studies
focus
on
rapid
crack-propagation
detachment
and
account
only
short-term
adhesion
governed
by
interfacial-viscoelastic
dissipation,
failing
explain
long-term
phenomena
like
sudden
after
prolonged
adherence
predict
corresponding
lifetimes.
Here,
we
investigate
the
through
rheological
paradigm
using
both
theory
experiment.
By
considering
bulk
rheology
interfacial
viscoelasticity
mechanisms,
show
that
durability
is
competition
between
them.
This
understanding
leads
accurate
lifetime
predictions,
which
validate
experiments.
In
addition,
our
study
reveals
previously
undocumented,
counterintuitive
phenomenon
unique
adhesion:
expansion
contact
area
under
tensile
forces,
in
contrast
always
shrinks
during
detachment.
research
fills
critical
gap
physics.
Advanced Intelligent Systems,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 10, 2025
Perching
significantly
enhances
the
energy
efficiency
and
operational
versatility
of
aerial
robots.
This
article
introduces
a
passive
tunable
perching
mechanism
designed
for
smooth
surfaces.
The
design
features
bistable
(BM)
with
soft
suction
cup,
augmented
by
two
sets
shape
memory
alloy
(SMA)
actuators
active
tuning.
BM
enables
rapid
attachment
upon
surface
contact.
A
set
SMA
wires
can
increase
BM's
triggering
force
to
handle
high
contact
speeds,
while
springs
attached
cup's
edges
pull
cup
orientation
misalignment.
Experiments
are
conducted
characterize
how
influence
displacement
under
continuous
steady‐state
low‐voltage
heating.
Additional
experiments
demonstrate
fast
tuning
using
momentary
high‐voltage
heating
enhance
efficiency.
successful
on
surfaces
adapt
varying
speeds
misalignments
when
properly
tuned
three
scenarios:
pendulum‐based
perching,
ground
ceiling
perching.
With
its
capability,
alleviate
need
precise
motion
control
an
robot
during
expanding
applications
robots
in
areas
like
environmental
monitoring
or
infrastructure
inspection.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 16, 2025
Bioinspired
dry
adhesives
based
on
van
der
Waals
forces
have
a
wide
range
of
impact
in
space
operations,
robot
manipulation,
and
other
fields.
Previous
studies
confirmed
the
significant
advantages
mushroom-shaped
structure
uniformly
distributing
separation
stress.
However,
most
them
are
with
an
abrupt
geometric
contour
neglected
effect
smooth
contact
process.
Here,
we
analyze
mechanism
contours
contact-separation
behavior
adhesive
structures
by
finite
element
analysis
investigate
enhancement
properties
structures.
On
this
basis,
propose
one-step
forming
strategy
inspired
growth
biological
to
obtain
flow
forming.
The
exhibit
more
excellent
performance
than
those
mutant
adhesion
test,
which
verifies
correctness
our
proposed
law
contours'
influence
behavior,
providing
new
idea
for
design
adhesive-based
systems.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(44), С. 61135 - 61143
Опубликована: Окт. 23, 2024
Selective
switchable
adhesion
has
recently
attracted
much
attention
due
to
its
wide
applications
in
transfer
printing,
information
transfer,
and
flexible
electronics.
However,
selective
adhesive
materials
often
have
a
complex
or
preparation
process,
which
limits
their
use.
To
overcome
this
problem,
study
prepares
composite
of
liquid
metal
foam
polydimethylsiloxane
(PDMS)
with
photocontrolled
adhesion,
can
directly
adhere
solids
at
room
temperature.
Utilizing
the
photoinduced
phase
transition
metals,
solid
be
regulated
by
changing
backing
layer
modulus
layer.
Since
process
is
gradually
completed
heat
from
illuminated
side
backlight
that
adheres
solid,
melting
area
on
controlling
light
time,
determines
regulation
area.
Therefore,
accuracy
reach
less
than
0.9
mm
without
relying
infrared
light.
Moreover,
based
different
scales
achieved
The
findings
may
provide
strategies
for
simple
improvement
control
accuracy.
