Pain‐perceptual nociceptors (PPN) are essential sensory neurons that recognize harmful stimuli and can empower the human body to react appropriately and perceive precisely unusual or dangerous conditions in the real world. Furthermore, the sensitization‐regulated nociceptors (SRN) can greatly assist pain‐sensitive human to reduce pain sensation by normalizing hyperexcitable central neural activity. Therefore, the implementation of PPNs and SRNs in hardware using emerging nanoscale devices can greatly improve the efficiency of bionic medical machines by giving them different sensitivities to external stimuli according to different purposes. However, current most‐normal organic/oxide transistors face a great challenge due to channel scaling, especially in the sub‐10 nm channel technology. Here, a sub‐10 nm indium‐tin‐oxide transistor with an ultrashort vertical channel as low as ≈3 nm, using sodium alginate bio‐polymer electrolyte as gate dielectric, is demonstrated. This device can emulate important characteristics of PPN such as pain threshold, memory of prior injury, and pain sensitization/desensitization. Furthermore, the most intriguing character of SRN can be achieved by tuning the channel thickness. The proposed device can open new avenues for the fascinating applications of next‐generation neuromorphic brain‐like systems, such as bio‐inspired electronic skins and humanoid robots.
Firefighting protective clothing
is an essential equipment that
can protect firefighters from burn injuries during the firefighting
process. However, it is still a challenge to detect the damage of
firefighting protective clothing at an early stage when firefighters
are exposed to excessively high temperature in fire cases. Herein,
an ultralight self-powered fire alarm electronic textile (SFA e-textile)
based on conductive aerogel fiber that comprises calcium alginate
(CA), Fe3O4 nanoparticles (Fe3O4 NPs), and silver nanowires (Ag NWs) was developed, which
achieved ultrasensitive temperature monitoring and energy harvesting
in firefighting clothing. The resulting SFA e-textile was integrated
into firefighting protective clothing to realize wide-range temperature
sensing at 100–400 °C and repeatable fire warning capability,
which could timely transmit an alarm signal to the wearer before the
firefighting protective clothing malfunctioned in extreme fire environments.
In addition, a self-powered fire self-rescue location system was further
established based on the SFA e-textile that can help rescuers search
and rescue trapped firefighters in fire cases. The power in the self-powered
fire location system was offered by an SFA e-textile-based triboelectric
nanogenerator (TENG). This work provided a useful design strategy
for the preparation of ultralight wearable temperature-monitoring
SFA e-textile used in firefighting protective clothing.
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