4 research outputs found
Wide-Range Linear Iontronic Pressure Sensor with Two-Scale Random Microstructured Film for Underwater Detection
A broad linear range
of ionic flexible sensors (IFSs) with high
sensitivity is vital to guarantee accurate pressure acquisition and
simplify back-end circuits. However, the issue that sensitivity gradually
decreases as the applied pressure increases hinders the linearity
over the whole working range and limits its wide-ranging application.
Herein, we design a two-scale random microstructure ionic gel film
with rich porosity and a rough surface. It increases the buffer space
during compression, enabling the stress deformation to be more uniform,
which makes sure that the sensitivity maintains steady as the pressure
loading. In addition, we develop electrodes with multilayer graphene
produced by a roll-to-roll process, utilizing its large interlayer
spacing and ion-accessible surface area. It benefits the migration
and diffusion of ions inside the electrolyte, which increases the
unit area capacitance and sensitivity, respectively. The IFS shows
ultra-high linearity and a linear range (correlation coefficient ∼
0.9931) over 0–1 MPa, an excellent sensitivity (∼12.8
kPa–1), a fast response and relaxation time (∼20
and ∼30 ms, respectively), a low detection limit (∼2.5
Pa), and outstanding mechanical stability. This work offers an available
path to achieve wide-range linear response, which has potential applications
for attaching to soft robots, followed with sensing slight disturbances
induced by ships or submersibles
Wide-Range Linear Iontronic Pressure Sensor with Two-Scale Random Microstructured Film for Underwater Detection
A broad linear range
of ionic flexible sensors (IFSs) with high
sensitivity is vital to guarantee accurate pressure acquisition and
simplify back-end circuits. However, the issue that sensitivity gradually
decreases as the applied pressure increases hinders the linearity
over the whole working range and limits its wide-ranging application.
Herein, we design a two-scale random microstructure ionic gel film
with rich porosity and a rough surface. It increases the buffer space
during compression, enabling the stress deformation to be more uniform,
which makes sure that the sensitivity maintains steady as the pressure
loading. In addition, we develop electrodes with multilayer graphene
produced by a roll-to-roll process, utilizing its large interlayer
spacing and ion-accessible surface area. It benefits the migration
and diffusion of ions inside the electrolyte, which increases the
unit area capacitance and sensitivity, respectively. The IFS shows
ultra-high linearity and a linear range (correlation coefficient ∼
0.9931) over 0–1 MPa, an excellent sensitivity (∼12.8
kPa–1), a fast response and relaxation time (∼20
and ∼30 ms, respectively), a low detection limit (∼2.5
Pa), and outstanding mechanical stability. This work offers an available
path to achieve wide-range linear response, which has potential applications
for attaching to soft robots, followed with sensing slight disturbances
induced by ships or submersibles
Wide-Range Linear Iontronic Pressure Sensor with Two-Scale Random Microstructured Film for Underwater Detection
A broad linear range
of ionic flexible sensors (IFSs) with high
sensitivity is vital to guarantee accurate pressure acquisition and
simplify back-end circuits. However, the issue that sensitivity gradually
decreases as the applied pressure increases hinders the linearity
over the whole working range and limits its wide-ranging application.
Herein, we design a two-scale random microstructure ionic gel film
with rich porosity and a rough surface. It increases the buffer space
during compression, enabling the stress deformation to be more uniform,
which makes sure that the sensitivity maintains steady as the pressure
loading. In addition, we develop electrodes with multilayer graphene
produced by a roll-to-roll process, utilizing its large interlayer
spacing and ion-accessible surface area. It benefits the migration
and diffusion of ions inside the electrolyte, which increases the
unit area capacitance and sensitivity, respectively. The IFS shows
ultra-high linearity and a linear range (correlation coefficient ∼
0.9931) over 0–1 MPa, an excellent sensitivity (∼12.8
kPa–1), a fast response and relaxation time (∼20
and ∼30 ms, respectively), a low detection limit (∼2.5
Pa), and outstanding mechanical stability. This work offers an available
path to achieve wide-range linear response, which has potential applications
for attaching to soft robots, followed with sensing slight disturbances
induced by ships or submersibles
Spatially Resolved Ferroelectric Domain-Switching-Controlled Magnetism in Co<sub>40</sub>Fe<sub>40</sub>B<sub>20</sub>/Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)<sub>0.7</sub>Ti<sub>0.3</sub>O<sub>3</sub> Multiferroic Heterostructure
Intrinsic
spatial inhomogeneity or phase separation in cuprates, manganites,
etc., related to electronic and/or magnetic properties, has attracted
much attention due to its significance in fundamental physics and
applications. Here we use scanning Kerr microscopy and scanning electron
microscopy with polarization analysis with in situ electric fields
to reveal the existence of intrinsic spatial inhomogeneity of the
magnetic response to an electric field on a mesoscale with the coexistence
of looplike (nonvolatile) and butterfly-like (volatile) behaviors
in Co<sub>40</sub>Fe<sub>40</sub>B<sub>20</sub>/PbÂ(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)<sub>0.7</sub>Ti<sub>0.3</sub>O<sub>3</sub> ferromagnetic/ferroelectric
(FM/FE) multiferroic heterostructures. Both the experimental results
and micromagnetic simulations suggest that these two behaviors come
from the 109° and the 71°/180° FE domain switching,
respectively, which have a spatial distribution. This FE domain-switching-controlled
magnetism is significant for understanding the nature of FM/FE coupling
on the mesoscale and provides a path for designing magnetoelectric
devices through domain engineering