Advanced Intelligent Systems,
Journal Year:
2024,
Volume and Issue:
6(10)
Published: Sept. 22, 2024
Space‐wall‐climbing
robots
face
the
challenge
of
stably
attaching
to
and
moving
on
spacecraft
surfaces,
which
include
smooth
flat
areas
rough
intricate
surfaces.
Although
adhesion‐based
wall‐climbing
demonstrate
stable
climbing
surfaces
in
outer
space,
there
is
scarce
research
their
adhesion
within
a
microgravity
environment.
A
novel
adhesive
material
developed
inspired
by
mechanism
locomotion
Gekko
gecko.
This
exhibits
exceptional
across
various
materials
surface
roughness.
variable‐stiffness
gecko‐inspired
paw
engineered,
generating
substantial
forces
while
minimizing
detachment
forces.
Impressively,
this
generates
up
180
N
force
achieves
without
external
By
integrating
such
paws
with
robot,
robot
effectively
operating
environment
created.
The
robotic
satellite
experiments
capture
are
conducted
using
simulated
model.
results
unequivocally
robot's
proficiency
executing
functions,
including
motion
both
These
underscore
potential
for
in‐orbit
services
recovery.
Science Advances,
Journal Year:
2025,
Volume and Issue:
11(3)
Published: Jan. 17, 2025
Electronic
skins
endow
robots
with
sensory
functions
but
often
lack
the
multifunctionality
of
natural
skin,
such
as
switchable
adhesion.
Current
smart
adhesives
based
on
elastomers
have
limited
adhesion
tunability,
which
hinders
their
effective
use
for
both
carrying
heavy
loads
and
performing
dexterous
manipulations.
Here,
we
report
a
versatile,
one-size-fits-all
robotic
adhesive
skin
using
shape
memory
polymers
tunable
rubber-to-glass
phase
transitions.
The
strength
our
can
be
changed
from
minimal
(~1
kilopascal)
sensing
handling
ultralightweight
objects
to
ultrastrong
(>1
megapascal)
picking
up
lifting
objects.
Our
versatile
is
expected
greatly
enhance
ability
intelligent
interact
environment.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(7), P. 9443 - 9452
Published: Feb. 9, 2024
Switchable
adhesive
is
essential
to
develop
transfer
printing,
which
an
advanced
heterogeneous
material
integration
technique
for
developing
electronic
systems.
Designing
a
switchable
with
strong
adhesion
strength
that
can
also
be
easily
eliminated
enable
noncontact
printing
still
remains
challenge.
Here,
we
report
simple
yet
robust
design
of
based
on
thermally
responsive
shape
memory
polymer
micropillars
different
heights.
The
takes
advantage
the
shape-fixing
property
provide
reliable
pick-up
and
various
levels
recovery
under
laser
heating
eliminate
in
way.
Systematic
experimental
numerical
studies
reveal
switch
mechanism
insights
into
adhesives.
This
provides
good
solution
laser-driven
capability
eliminating
influence
receivers
performance
printing.
Demonstrations
silicon
wafers,
microscale
Si
platelets,
micro
light
emitting
diode
(μ-LED)
chips
onto
challenging
nonadhesive
(e.g.,
sandpaper,
stainless
steel
bead,
leaf,
or
glass)
form
desired
two-dimensional
three-dimensional
layouts
illustrate
its
great
potential
deterministic
assembly.
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 21, 2025
Thermoresponsive
shape
memory
polymer
(SMP)
adhesives
have
demonstrated
a
high
adhesion
strength
and
large
switching
ratios
on
different
substrates.
However,
long
response
time
to
switch
or
off
is
generally
encountered.
This
study
provides
fast
method
based
the
temperature
rate
dependence
of
within
glass-transition
zone
an
epoxy
polymer.
The
samples
were
prepared.
molecular
structure
thermal
mechanical
properties
characterized.
sample
against
hemispherical
glass
indenter
was
measured.
Effects
preset
retraction
speed
investigated,
switchable
evaluated.
results
show
that
there
exists
critical
(Vc)
makes
viscoelasticity
maximum
at
each
temperature.
gradually
enhance
below
Vc
weaken
above
with
increasing
speed,
indicating
effects
originate
from
viscoelastic
difference
under
conditions.
pull-off
force
(Fpull-off)
verified
linearly
depend
dissipated
energy
ratio
(r),
work
done
during
pulling
(U3),
reduced
modulus
(Er),
contact
radius
apull-off,
i.e.,
Fpull-off
∝
rU3Erapull-off.
polymer-based
demonstrates
(∼488
kPa),
(approaching
infinity),
short
(<100
ms)
simultaneously
dual
regulation
strategy
rate.
insights
into
may
activate
development
applications
relevant
techniques
devices.
Journal of the Mechanics and Physics of Solids,
Journal Year:
2024,
Volume and Issue:
193, P. 105844 - 105844
Published: Sept. 2, 2024
The
contact
between
a
rigid
Hertzian
indenter
and
an
adhesive
broad-band
viscoelastic
substrate
is
considered.
material
behaviour
described
by
modified
power
law
model,
which
characterized
only
four
parameters,
the
glassy
rubbery
elastic
moduli,
characteristic
exponent
n
timescale
τ0.
maximum
adherence
force
that
can
be
reached
while
unloading
from
relaxed
half-space
studied
means
of
numerical
implementation
based
on
boundary
element
method,
as
function
velocity,
preload
varying
broadness
spectrum.
Through
comprehensive
analysis
we
have
determined
minimum
radius
needed
to
achieve
amplification
pull-off
at
specified
rate
for
different
exponents
n.
results
are
then
compared
with
prediction
Persson
Brener
crack
propagation
theory,
providing
excellent
agreement.
However,
comparison
against
experimental
tests
glass
lens
indenting
PDMS
shows
data
fitted
linear
theory
up
about
100μm/s
showing
fracture
process
zone
rate-dependent
contribution
energy
enhancement
same
order
bulk
dissipation
contribution.
Hence,
limitations
current
theoretical
models
adhesion
discussed
in
light
most
recent
literature
results.
International Journal of Smart and Nano Materials,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 41
Published: Dec. 17, 2024
Smart
dry
adhesives,
a
rapidly
growing
class
of
intelligent
materials
and
structures,
are
engineered
to
provide
strong,
robust
adhesion
when
needed
while
also
allowing
for
controlled,
easy
detachment
in
response
specific
stimuli.
Traditional
smart
often
exemplified
by
fibrillar
structures
made
elastomers,
face
number
challenges.
These
include
limitations
on
maximum
strength
imposed
microstructural
dimensions,
restricted
adaptability
surfaces
with
varying
degrees
roughness,
an
inherent
trade-off
between
switchability.
This
review
explores
how
shape
memory
polymers
(SMPs)
can
address
these
challenges
and,
through
their
rubber-to-glass
(R2G)
transition
capability,
powerful
foundation
the
next
generation
adhesives.
Specifically,
we
summarize
elucidate
mechanisms
which
SMPs
enhance
switchability
material
characteristics
such
as
tunable
stiffness,
shape-locking,
shape-memory
effects.
Additionally,
discuss
wide
range
innovative
designs
applications
SMP
offering
insights
into
ongoing
emerging
opportunities
this
evolving
field.
Advanced Intelligent Systems,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 2, 2025
This
article
introduces
a
gecko‐inspired,
rolling,
inward
adhesion/outward
release
gripper
with
adhesive
contact
sensing
for
grasping
convex‐to‐flat
surfaces.
The
consists
of
pneumatically
driven
hierarchical
modules
(bio‐toe)
the
capability
sensing,
and
rolling
inward/outward
module
(rolling
module).
bio‐toe
manufactured
using
soft
materials
can
safely
flexibly
cater
to
curved
flat
developed
four‐bar
linkage
mechanism
allows
opposing
bio‐toes
roll
enhance
adhesion
(adhesion
forces
up
6.3
N
on
surface
23
an
18
m
−1
surface)
outward
decrease
force
in
releasing
(less
than
3
especially
less
0.8
surface).
Embedded
resistive
strain
gauges
provide
real
time
signals
controller
determine
status
bio‐toe,
such
as
bending,
adhesion/release,
even
rates,
thereby
allowing
autonomously
approach,
envelop,
adhere
to,
objects
various
shapes,
potential
dynamic
control
future.
equipped
biomimetic
capabilities
exhibits
broader
range
applicability
smart
grabbing
across
industrial,
agricultural,
human–robot
interaction
contexts.
Science Advances,
Journal Year:
2025,
Volume and Issue:
11(11)
Published: March 14, 2025
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.
