Transparent stretchable capacitive touch sensor grid using ionic liquid electrodes

Nguyen, Ngoc Tan; Sarwar, Mirza Saquib; Preston, Claire; Goff, Aziliz Le; Plesse, Cédric; Vidal, Frédéric; Cattan, Éric; Madden, John D. W.

doi:10.1016/j.eml.2019.100574

Cited by 15 publications

(8 citation statements)

References 39 publications

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“…It is important to note that our transparent and stretchable touch sensor array is the thinnest (≈100 μm) among the previously reported transparent and stretchable touch sensors (Table S2, Supporting Information). [35][36][37][38][39][40] Such a reduced thickness can significantly improve the conformability of the devices to arbitrary surfaces, including human or robotic skins. [41] Our sensor does not cause discomfort of wearing because it is as soft as human skin.…”

Section: Stretchable Transparent Sensor Arraysmentioning

confidence: 99%

A High‐Resolution, Transparent, and Stretchable Polymer Conductor for Wearable Sensor Arrays

Shimura

Sato

Tominaga

et al. 2023

Adv Materials Technologies

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Arrays of stretchable and transparent electronic sensors realize next-generation skin-conformable wearables and soft robotic skins, which require a high-resolution patternable stretchable conductor. However, the difficulty of simultaneously engineering desirable material properties (i.e., conductivity, stretchability, and patternability) has limited the development of such stretchable electronic materials. Herein, a high-resolution patternable, stretchable, and transparent conducting polymer by decoupled engineering of the material properties is shown. The high conductivity of the conducting polymer is achieved by rationally designing an ionic additive. The high stretchability is realized by matching the mechanical properties of the conducting polymer to the substrate. The developed conducting polymer is then patterned in a resolution less than 10 μm by nanosecond UV laser ablation, which enables the feasible demonstration of stretchable and transparent sensor arrays for touch and strain. The findings in this work will accelerate the development of high-density stretchable sensor arrays and stretchable semiconductor devices.

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Section: Stretchable Transparent Sensor Arraysmentioning

confidence: 99%

A High‐Resolution, Transparent, and Stretchable Polymer Conductor for Wearable Sensor Arrays

Shimura

Sato

Tominaga

et al. 2023

Adv Materials Technologies

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“…When subjected to an external stimulus, the output signal changes significantly. [ 26 ] In this way, wherever the finger touches the grid it will give origin to a point that absorbs the electrostatic field, and a difference appears between the amplitude without and with touch, indicating the presence of an external conductive object, and therefore the existence of a touch.…”

Section: Resultsmentioning

confidence: 99%

Environmentally Friendly Graphene‐Based Conductive Inks for Multitouch Capacitive Sensing Surfaces

Correia

Marques²,

Sousa³

et al. 2021

Adv Materials Inter

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Conductive graphene‐based inks can be tailored for functional applications and, in particular, for printed electronics. Transparent, flexible, and easy printable materials are nowadays increasingly required for sensing applications. In this context, a capacitive multitouch sensing surface is developed using conductive graphene nanoparticles‐based ink with carboxymethyl cellulose as a binder. The rheological properties of the ink are tailored to be printed by the screen‐printing technique. The touchscreen is based on printed conductive lines and columns and thus the characteristics of the printed lines are optimized based on the line width and number of printing steps. The optimal printed conditions are 0.5 mm of width and five printing steps, leading to electrical resistance of 2.4 kΩ. The screen‐printed flexible touchscreen is composed of 40 columns × 28 rows. An electric circuit and a graphic interface are also developed leading to an 8” touchscreen with multitouch capabilities and fast signal processing.

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“…In fact, while PAAm hydrogel and LiCl granted, respectively, extreme stretchability (up to 1600% strain) and ionic conductivity (0.6 S/m), MBI provided the proposed e-skin with the additional ability to turn from light yellow to red as a function of pressure applied, as shown in Figure 4.1. A three-step fabrication process mould-bond-polymerize was used to fabricate cross-grid array of ionic hydrogels [44].…”

Section: Composition Fabrication Type and Mode Of Sensing Of Hydrogel...mentioning

confidence: 99%

“…Epidermal touch panel use on skin was demonstrated by writing words, playing a piano and playing games[43].The effect of touch of Nguyen et al sensor is clearly visible even when the sensor is bent or stretched. In addition, the sensor is transparent (95% transmittance), resilient under repeated tensile strain, can withstand exposure to temperatures between −4 and 100°C without loss of performance and shows good shelf life[44].Han et al ITS showed excellent sensitivity (7.85 mV per 1% strain) with good cyclic stability: no obvious change in output potential was observed during the measurement of over 4000 bending per flat cycles (Figure 4.7).…”

mentioning

confidence: 99%

Ionic tactile sensors as promising biomaterials for artificial skin: Review of latest advances and future perspectives

Scaffaro

Citarrella

2021

European Polymer Journal

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Transparent stretchable capacitive touch sensor grid using ionic liquid electrodes

Cited by 15 publications

References 39 publications

A High‐Resolution, Transparent, and Stretchable Polymer Conductor for Wearable Sensor Arrays

A High‐Resolution, Transparent, and Stretchable Polymer Conductor for Wearable Sensor Arrays

Environmentally Friendly Graphene‐Based Conductive Inks for Multitouch Capacitive Sensing Surfaces

Ionic tactile sensors as promising biomaterials for artificial skin: Review of latest advances and future perspectives

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