Characteristic evaluation of a solid polymer electrolyte sensor

Otsuki, Manabu; Okuyama, Takeshi; Tanaka, Mami

doi:10.1007/s00542-011-1285-z

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…The voltage resulting from a steady mechanical deformation can persist providing either cations or anions are immobilized onto the polymer backbones such as seen in IPMC based configurations [28]. If both cationic and anionic species are mobile, signal may arise due to differences in diffusion coefficients and mobilities between species.…”

Section: Figure 2: Piezoionic Effect Showing Inhomogeneous Ionic Distmentioning

confidence: 99%

Transparent and conformal 'piezoionic' touch sensor

Sarwar

Dobashi

Glitz³

et al. 2015

SPIE Proceedings

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A polyurethane hydrogel based touch sensor with high transparency and conformability is demonstrated. Polyurethane hydrogels swollen with various electrolytes were compressed at a pressure of 30 kPa, simulating a fingertap on a conventional touch screen device. Unlike ionic polymer metal composite and conducting polymer trilayer sensors, where electrodes render the sensors opaque and relatively rigid, the electrodes used in this work are metal wires or strips, separated from each other by regions of transparent film, enabling transparency and compliance. The voltages and currents observed when the perturbation is above one electrode are on the order of 10(-2) V and 10(-7) A, relative to a second electrode that is approximately 1 cm away. The sign of voltage and current signals detected from perturbations made between electrodes is determined by relative proximity to each electrode, and the magnitude appears to decrease with increasing distance from the electrodes. These observations suggest that it may be possible to discriminate the location of touch based on signals transmitted to the edges of an ionically conductive film. A model to describe the inhomogeneous ionic distribution and predict the resultant voltage and current is presented to qualitatively explain the sensing, based on the Donnan potential. ABSTRACTA polyurethane hydrogel based touch sensor with high transparency and conformability is demonstrated. Polyurethane hydrogels swollen with various electrolytes were compressed at a pressure of 30 kPa, simulating a fingertap on a conventional touch screen device. Unlike ionic polymer metal composite and conducting polymer trilayer sensors, where electrodes render the sensors opaque and relatively rigid, the electrodes used in this work are metal wires or strips, separated from each other by regions of transparent film, enabling transparency and compliance. The voltages and currents observed when the perturbation is above one electrode are on the order of 10 -2 V and 10 -7 A, relative to a second electrode that is approximately 1 cm away. The sign of voltage and current signals detected from perturbations made between electrodes is determined by relative proximity to each electrode, and the magnitude appears to decrease with increasing distance from the electrodes. These observations suggest that it may be possible to discriminate the location of touch based on signals transmitted to the edges of an ionically conductive film. A model to describe the inhomogeneous ionic distribution and predict the resultant voltage and current is presented to qualitatively explain the sensing, based on the Donnan potential.

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Section: Figure 2: Piezoionic Effect Showing Inhomogeneous Ionic Distmentioning

confidence: 99%

Transparent and conformal 'piezoionic' touch sensor

Sarwar

Dobashi

Glitz³

et al. 2015

SPIE Proceedings

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show abstract

“…Also, functionality of the polymer sensor using SPE film has been investigated. [12,15] It was observed that the output voltage of the sensor is associated with bending deformation [12]. Moreover, it was found that the output voltage of the polymer sensor is proportional to the average of the deformed curvature over the whole sensor element [15].…”

Section: Structure Of Polymer Sensor Elementmentioning

confidence: 99%

“…[12,15] It was observed that the output voltage of the sensor is associated with bending deformation [12]. Moreover, it was found that the output voltage of the polymer sensor is proportional to the average of the deformed curvature over the whole sensor element [15]. Although static fundamental characteristics are revealed, it is necessary to investigate the dynamic characteristics for applying a human motion measurement such as scratching.…”

Section: Structure Of Polymer Sensor Elementmentioning

confidence: 99%

“…In previous studies [12,15], it was reported that the output voltage of the polymer sensor is proportional to the average of the curvature over the whole sensor element. Therefore, in order to estimate the finger posture during scratching, a finger bending motion sensor using polymer sensor is proposed and fabricated as shown in Fig.…”

Section: Scratch Motion Sensor Using Polymer Sensormentioning

confidence: 99%

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Frequency Response of Polymer Sensor for Measuring Finger Scratching Motion

Okuyama

Hatakeyama

Tanaka

2015

Journal of the Japan Society of Applied Electromagnetics and Me

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In our works, a human skin scratching monitoring system has been developed in order to evaluate the itch sensation. For the purpose, finger posture is one of important information. In order to obtain the finger posture, a simple sensor system using a polymer sensor is proposed. The polymer sensor is composed of ionic liquid and solid polymer electrolyte. The sensor output is corresponding to the deformed curvature in sensor. Firstly, frequency response of the polymer sensor is investigated. It was found that the sensor output slightly decreases with the increase in the deformation frequency and that hysteresis loop enlarges with increase of the frequency. Next, a scratch motion sensor is fabricated. It has a simple structure that the polymer sensor is attached on the finger joint by using a net bandage. Then, Relationship between finger bending angle and sensor output is investigated. From the comparison between sensor output and the bending angle, it is observed that sensor output has a good agreement with the finger bending angle. As a result, it is found that the polymer sensor is available to measure the finger bending during scratching.

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Characteristic evaluation of a solid polymer electrolyte sensor

Cited by 2 publications

References 7 publications

Transparent and conformal 'piezoionic' touch sensor

Transparent and conformal 'piezoionic' touch sensor

Frequency Response of Polymer Sensor for Measuring Finger Scratching Motion

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