Related Experiment Video
Updated: Jul 2, 2026
11:17
Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor
Published on: February 10, 2014
Tactile Neuromorphic Ion-Gated Vertical Transistor Displays Enabling Dual-Output Reservoir Computing
Seung Jun Lee1, Woojoong Kim1, Jioh Yoo1
1Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea.
ACS Nano
|July 1, 2026
Summary
We developed a tactile neuromorphic ion-gated vertical transistor display (TN-VTD) that integrates sensing, processing, and visual output. This device achieves high accuracy in spoken-digit classification by combining electrical and optical signals.
Area of Science:
- Materials Science
- Neurotechnology
- Optoelectronics
Background:
- Next-generation intelligent interfaces require integrated tactile sensing, neuromorphic processing, and visual emission.
- Existing tactile neuromorphic displays need improvements in brightness, emission stability, and optical modulation.
Purpose of the Study:
- To present a novel tactile neuromorphic ion-gated vertical transistor display (TN-VTD).
- To demonstrate the device's capability for simultaneous pressure sensing, synaptic plasticity, and electroluminescence.
Main Methods:
- Fabricated a TN-VTD with a hemispherical elastomeric gate and nanoporous Al electrode.
- Utilized ion penetration to modulate doping and band bending in an emissive layer upon mechanical deformation.
- Investigated ion-coupled design for pressure-dependent electrical and optical responses.
Main Results:
- Achieved continuous, stable DC emission (>24 h) and gate-enhanced brightness.
- Demonstrated pressure-dependent expansion of the emissive area.
- Showcased nonlinear fading-memory responses with distinct temporal dynamics.
- Attained 93.5% spoken-digit classification accuracy, outperforming conductance-only operation.
Conclusions:
- The TN-VTD serves as a unified platform for sensing, neuromorphic processing, and visual output.
- Multidimensional state encoding via concurrent electrical and optical outputs enhances performance.
- This technology advances the development of intelligent interfaces.
Related Concept Videos
01:14Design Example: Resistive Touchscreen
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...
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...
01:25MOS Capacitor
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
01:22MOSFET: Enhancement Mode
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
01:20Design Example: Capacitance Multiplier Circuit
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
00:51Non-ohmic Devices
In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A diode...
Consider a simple circuit consisting of a battery, a diode, and a resistor. A diode...
01:27Tactile and Chemical Senses
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. This...