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Related Concept Videos

Tactile and Chemical Senses01:27

Tactile and Chemical Senses

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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Somatosensation01:33

Somatosensation

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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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Sensory Functions of the Skin01:16

Sensory Functions of the Skin

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The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
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Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

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A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
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Introduction to Special Senses01:26

Introduction to Special Senses

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Sensory receptors play an integral part in comprehending our external and internal environments. They receive diverse stimuli, converting them into the nervous system's electrochemical signals. This conversion occurs as the stimulus alters the sensory neuron's cell membrane potential, instigating the generation of an action potential. This action potential is subsequently transmitted to the central nervous system (CNS), which integrates with other sensory data or higher cognitive...
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Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

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The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
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Related Experiment Video

Updated: Dec 10, 2025

A Tactile Automated Passive-Finger Stimulator TAPS
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Hierarchically patterned self-powered sensors for multifunctional tactile sensing.

Yang Wang1, Heting Wu1,2, Lin Xu1,3

  • 1CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.

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|September 3, 2020
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Summary
This summary is machine-generated.

This study introduces a novel multifunctional flexible sensor capable of pressure, temperature, and material identification. This innovative sensor utilizes graphene/polydimethylsiloxane sponges for advanced tactile sensing applications.

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Area of Science:

  • Materials Science and Engineering
  • Nanotechnology
  • Sensor Technology

Background:

  • Flexible sensors are crucial for tactile sensing and wearable electronics.
  • Existing research primarily focuses on pressure or temperature sensing, with material identification remaining a significant challenge.
  • The development of multifunctional sensors is essential for advancing functional electronics.

Purpose of the Study:

  • To develop a multifunctional flexible sensor capable of pressure, temperature, and material identification.
  • To engineer graphene/polydimethylsiloxane sponges for enhanced sensor performance.
  • To demonstrate the sensor's capability for low-cost material property inference.

Main Methods:

  • Fabrication of a multifunctional sensor using hydrophobic films and graphene/polydimethylsiloxane sponges.
  • Optimization of sponge structure for improved sensor characteristics.
  • Characterization of sensor performance under pressure and temperature stimuli, and evaluation of contact-induced electrification for material identification.

Main Results:

  • The sensor achieved high pressure sensitivity (>15.22 kPa⁻¹), fast response time (<74 ms), and excellent stability (>3000 cycles).
  • Temperature sensing resolution of 1 Kelvin was demonstrated via the thermoelectric effect.
  • The sensor successfully generated distinct output voltage signals upon contact with different materials, enabling material property inference.

Conclusions:

  • The developed multifunctional sensor offers a promising solution for tactile sensing, temperature monitoring, and material identification.
  • The sensor's low cost and material identification capabilities provide a novel design concept for functional electronics.
  • This research paves the way for advanced wearable devices and intelligent material characterization systems.