4 research outputs found
Flexible Ag<sub>2</sub>Se Thermoelectric Films Enable the Multifunctional Thermal Perception in Electronic Skins
Skin is critical for shaping our interactions with the
environment.
The electronic skin (E-skin) has emerged as a promising interface
for medical devices to replicate the functions of damaged skin. However,
exploration of thermal perception, which is crucial for physiological
sensing, has been limited. In this work, a multifunctional E-skin
based on flexible thermoelectric Ag2Se films is proposed,
which utilizes the Seebeck effect to replicate the sensory functions
of natural skin. The E-skin can enable capabilities including temperature
perception, tactile perception, contactless perception, and material
recognition by analyzing the thermal conduction behaviors of various
materials. To further validate the capabilities of constructed E-skins,
a wearable device with multiple sensory channels was fabricated and
tested for gesture recognition. This work highlights the potential
for using flexible thermoelectric materials in advanced biomedical
applications including health monitoring and smart prosthetics
Flexible Ag<sub>2</sub>Se Thermoelectric Films Enable the Multifunctional Thermal Perception in Electronic Skins
Skin is critical for shaping our interactions with the
environment.
The electronic skin (E-skin) has emerged as a promising interface
for medical devices to replicate the functions of damaged skin. However,
exploration of thermal perception, which is crucial for physiological
sensing, has been limited. In this work, a multifunctional E-skin
based on flexible thermoelectric Ag2Se films is proposed,
which utilizes the Seebeck effect to replicate the sensory functions
of natural skin. The E-skin can enable capabilities including temperature
perception, tactile perception, contactless perception, and material
recognition by analyzing the thermal conduction behaviors of various
materials. To further validate the capabilities of constructed E-skins,
a wearable device with multiple sensory channels was fabricated and
tested for gesture recognition. This work highlights the potential
for using flexible thermoelectric materials in advanced biomedical
applications including health monitoring and smart prosthetics
Flexible Ag<sub>2</sub>Se Thermoelectric Films Enable the Multifunctional Thermal Perception in Electronic Skins
Skin is critical for shaping our interactions with the
environment.
The electronic skin (E-skin) has emerged as a promising interface
for medical devices to replicate the functions of damaged skin. However,
exploration of thermal perception, which is crucial for physiological
sensing, has been limited. In this work, a multifunctional E-skin
based on flexible thermoelectric Ag2Se films is proposed,
which utilizes the Seebeck effect to replicate the sensory functions
of natural skin. The E-skin can enable capabilities including temperature
perception, tactile perception, contactless perception, and material
recognition by analyzing the thermal conduction behaviors of various
materials. To further validate the capabilities of constructed E-skins,
a wearable device with multiple sensory channels was fabricated and
tested for gesture recognition. This work highlights the potential
for using flexible thermoelectric materials in advanced biomedical
applications including health monitoring and smart prosthetics
NMR Study of the Hydrolysis and Dehydration of Inulin in Water: Comparison of the Catalytic Effect of Lewis Acid SnCl<sub>4</sub> and Brønsted Acid HCl
Various
NMR techniques were employed to study the catalytic performance
of the Lewis acid SnCl<sub>4</sub> and the Brønsted acid HCl
in the conversion of inulin to value-added compounds by hydrolysis
and subsequent dehydration. The hydrolysis of inulin was examined
to reveal the catalytic abilities of SnCl<sub>4</sub> besides its
intrinsic acidity by in situ <sup>1</sup>H and <sup>13</sup>C NMR
at 25 °C. The dehydration reaction of inulin with SnCl<sub>4</sub> as catalyst was followed by high temperature in situ <sup>1</sup>H NMR at 80 °C. The fructose moieties were dehydrated to 5-(hydroxymethly)furfural
(5-HMF), but the glucose fragment of inulin was inactive for dehydration
reaction under this condition. The formation of 5-HMF and its transformation
into formic acid and levulinic acid through a rehydration reaction
could be monitored by in situ NMR spectroscopy. Moreover, diffusion
ordered spectroscopy NMR revealed that the Lewis acid ion, Sn<sup>4+</sup> interacts with the inulin model compounds, i.e., sucrose
and fructose. The synergistic effects of complexation and acidity
from the hydrolysis of SnCl<sub>4</sub> results in a higher catalytic
ability of this Lewis acid catalyst compared with a Brønsted
acid