Mechanoluminescent, Air-Dielectric MoS<sub>2</sub> Transistors as Active-Matrix Pressure Sensors for Wide Detection Ranges from Footsteps to Cellular Motions

Jang, Jiuk; Kim, Hyobeom; Ji, Sangyoon; Kim, Ha Jun; Kang, Min Soo; Kim, Tae Soo; Won, Jong‐Eun; Lee, Jae Hyun; Cheon, Jinwoo; Kang, Kibum; Im, Won Bin; Park, Jang Ung

doi:10.1021/acs.nanolett.9b02978

Cited by 87 publications

(71 citation statements)

References 37 publications

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“…This device is the completed form of an integrated system of a pressure sensor and a biochemical sensor, suggesting a substantial platform for future biomedical applications of tactile pressure sensors [136]. Jang et al (2020) presented the formation of active-matrix, pressure-sensitive, MoS 2 FET arrays with air dielectrics and mechanoluminescence materials for sensing extensive ranges of tactile pressure [15]. In this work, a single FET can operate solely as a pressure sensor, and, therefore, the active-matrix formation using these FETs can be advantageous for high spatial resolutions with miniaturized integrations.…”

Section: Healthcare Biosystemsmentioning

confidence: 99%

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Motion Detection Using Tactile Sensors Based on Pressure-Sensitive Transistor Arrays

Jang

Jun

Seo

et al. 2020

Sensors

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In recent years, to develop more spontaneous and instant interfaces between a system and users, technology has evolved toward designing efficient and simple gesture recognition (GR) techniques. As a tool for acquiring human motion, a tactile sensor system, which converts the human touch signal into a single datum and executes a command by translating a bundle of data into a text language or triggering a preset sequence as a haptic motion, has been developed. The tactile sensor aims to collect comprehensive data on various motions, from the touch of a fingertip to large body movements. The sensor devices have different characteristics that are important for target applications. Furthermore, devices can be fabricated using various principles, and include piezoelectric, capacitive, piezoresistive, and field-effect transistor types, depending on the parameters to be achieved. Here, we introduce tactile sensors consisting of field-effect transistors (FETs). GR requires a process involving the acquisition of a large amount of data in an array rather than a single sensor, suggesting the importance of fabricating a tactile sensor as an array. In this case, an FET-type pressure sensor can exploit the advantages of active-matrix sensor arrays that allow high-array uniformity, high spatial contrast, and facile integration with electrical circuitry. We envision that tactile sensors based on FETs will be beneficial for GR as well as future applications, and these sensors will provide substantial opportunities for next-generation motion sensing systems.

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Section: Healthcare Biosystemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Motion Detection Using Tactile Sensors Based on Pressure-Sensitive Transistor Arrays

Jang

Jun

Seo

et al. 2020

Sensors

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“…Inspection of complex engineering systems and early diagnosis of diseases require the utilization of multiple sensor sources to acquire information. [ 1–6 ] Among the elements of the sensory systems, visual and tactile perceptions are the key intuitive parameters for object recognition, [ 7–9 ] and the synchronized detection of these two sensory modalities can enhance the accuracy of the cognitive system further by providing complementary information between them. For example, the multimodal interactions to combine visual and tactile sensing information take place in the human brain to maximize the object recognition performance.…”

Section: Introductionmentioning

confidence: 99%

Multimodal Digital X‐ray Scanners with Synchronous Mapping of Tactile Pressure Distributions using Perovskites

Jang

Grandhi

et al. 2021

Advanced Materials

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detection of these two sensory modalities can enhance the accuracy of the cognitive system further by providing complementary information between them. For example, the multimodal interactions to combine visual and tactile sensing information take place in the human brain to maximize the object recognition performance.As a visual-inspection method, X-ray detectors, which can examine the inside of the objects, have been implemented in various fields, such as industrial non-destructive testing, homeland security, and medical diagnostic imaging. [10][11][12][13][14][15][16] Although the X-ray inspection system is indispensable for the assessment of internal structures, which the human eye and optical cameras cannot observe, this X-ray inspection only provides visual information, which can limit the extension of its potential applications. [17] To improve the quality of inspection and diagnosis, the mapping of tactile pressure distributions should be used to detect excessive pressures, for example, the expansion of batteries before they explode and the fatigue failure of pipelines. Also, combining visual and tactile information makes it possible to diagnose various diseases (e.g., edema, scoliosis, and diabetes) by measuring additional pressure-related factors, such as body pressure and the circulation of blood, which cannot be measured by X-ray radiography alone. [18][19][20] Therefore, using a multimodal sensory platform that consists of X-ray detectors and tactile pressure sensors, which allows the simultaneous visuotactile imaging of the internal structures and external morphologies of target objects, can be an effective way to acquire accurate inspections.Metal halide perovskites are a new generation of semiconductor materials with extraordinary properties that allow the direct conversion of X-rays into electronic signals. Although these perovskites can be fabricated using a low-temperature solution process, their 3D integration capability for multiplexed sensory platforms has been limited due to their inherent vulnerability to the heat and moisture in the fabrication process, both of which degrade their remarkable optoelectronic properties. [21] Recently, direct-conversion X-ray detectors have been reported in which the perovskite layer is simply coated onto a commercially available Si transistor array for digitized pixel imaging. [14] However, the rigid and fragile form of this Si transistor Visual and tactile information are the key intuitive perceptions in sensory systems, and the synchronized detection of these two sensory modalities can enhance accuracy of object recognition by providing complementary information between them. Herein, multimodal integration of flexible, high-resolution X-ray detectors with a synchronous mapping of tactile pressure distributions for visualizing internal structures and morphologies of an object simultaneously is reported. As a visual-inspection method, perovskite materials that convert X-rays into charge carriers directly are synthesized. By incorporating pressure-sensitive ...

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“…Recent advances in skin-attachable devices have driven considerable attention in broad fields such as displays 1,2 , motion detection sensors [3][4][5] , drug delivery devices 6 , and biosensors [7][8][9][10] . Most studies have been mainly focused on developing flexible and stretchable skinattachable devices for the comfort of individuals 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Integration of Transparent Supercapacitors and Electrodes Using Nanostructured Metallic Glass Films for Wirelessly Rechargeable, Skin Heat Patches

Kim

Ghidelli

et al. 2020

Nano Lett.

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Here we demonstrate an unconventional fabrication of highly transparent supercapacitors and electrodes using random networks of nanostructured metallic glass nanotroughs for their integrations as wirelessly rechargeable and invisible, skin heat patches.Transparent supercapacitors with fine conductive patterns were printed using an electrohydrodynamic jet-printing. Also, transparent and stretchable electrodes, for wireless antennas, heaters and interconnects, were formed using random network based on nanostructured CuZr nanotroughs and Ag nanowires with superb optoelectronic properties (sheet resistance of 3.0 Ω/sq at transmittance of 91.1%). Their full integrations, as an invisible heat patch on skin, enabled the wireless recharge of supercapacitors and the functions of heaters for thermal therapy of skin tissue. The demonstration of this transparent thermotherapy patch to control the blood perfusion level and hydration rate of skin suggests a promising strategy toward next-generation wearable electronics.

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Mechanoluminescent, Air-Dielectric MoS₂ Transistors as Active-Matrix Pressure Sensors for Wide Detection Ranges from Footsteps to Cellular Motions

Cited by 87 publications

References 37 publications

Motion Detection Using Tactile Sensors Based on Pressure-Sensitive Transistor Arrays

Motion Detection Using Tactile Sensors Based on Pressure-Sensitive Transistor Arrays

Multimodal Digital X‐ray Scanners with Synchronous Mapping of Tactile Pressure Distributions using Perovskites

Integration of Transparent Supercapacitors and Electrodes Using Nanostructured Metallic Glass Films for Wirelessly Rechargeable, Skin Heat Patches

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Mechanoluminescent, Air-Dielectric MoS2 Transistors as Active-Matrix Pressure Sensors for Wide Detection Ranges from Footsteps to Cellular Motions

Cited by 87 publications

References 37 publications

Motion Detection Using Tactile Sensors Based on Pressure-Sensitive Transistor Arrays

Motion Detection Using Tactile Sensors Based on Pressure-Sensitive Transistor Arrays

Multimodal Digital X‐ray Scanners with Synchronous Mapping of Tactile Pressure Distributions using Perovskites

Integration of Transparent Supercapacitors and Electrodes Using Nanostructured Metallic Glass Films for Wirelessly Rechargeable, Skin Heat Patches

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Mechanoluminescent, Air-Dielectric MoS₂ Transistors as Active-Matrix Pressure Sensors for Wide Detection Ranges from Footsteps to Cellular Motions