Low-Power and ppm-Level Detection of Gas Molecules by Integrated Metal Nanosheets

Tanaka, Tatsuo; Tabuchi, Kenta; Tatehora, Kohei; Shiiki, Yohsuke; Nakagawa, Shuya; Takahashi, Tetsuo; Shimizu, Ryo; Ishikuro, Hiroki; Kuroda, Tôru; Yanagida, Takeshi; Uchida, K.

doi:10.23919/vlsic.2019.8778016

Cited by 7 publications

(1 citation statement)

References 7 publications

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“…Experimental comparisons of sensor responses during continuous and pulsed operations revealed that the pulsed operations reduce the power consumption while maintaining the sensor response. Although preliminary results were reported in [12], this article describes the experiments and analysis in greater detail for understanding the thermal properties of metal nanosheet sensors as thermal equivalent circuits; estimations of the operating temperatures of selfheated metal nanosheet sensors and the temperature dependence of sensor responses are discussed. Furthermore, toward practical application, sensor responses were measured during long-time self-heating operation.…”

Section: Introductionmentioning

confidence: 99%

Low-Power and ppm-Level Multimolecule Detection by Integration of Self-Heated Metal Nanosheet Sensors

Tanaka

Yanagida

Uchida

et al. 2019

IEEE Trans. Electron Devices

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H 2 and NH 3 detection with low power consumption was demonstrated by integrated chemiresistive Pt and PtRh nanosheet sensors on glass substrates. The selfheating effects realized low power and local heating of metal nanosheet sensors, enabling the integration of sensors with different operating temperatures. Based on different resistance changes in Pt and PtRh nanosheets toward H 2 and NH 3 , the concentration of each gas was detected from a gas mixture by consuming around 1-mW power. For decreasing the power consumption and further integration of sensors, sensor scaling and pulsed operations were numerically and experimentally studied. In addition to good connectivity of metal nanosheet sensors to large-scale integration (LSI) circuits, improvements of the power consumption by sensor scaling were proven. The pulsed operations required for integrated sensor arrays maintained a sensor response, or a resistance change, of approximately 60%, even when the power consumption was reduced by 20%.

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Section: Introductionmentioning

confidence: 99%

Low-Power and ppm-Level Multimolecule Detection by Integration of Self-Heated Metal Nanosheet Sensors

Tanaka

Yanagida

Uchida

et al. 2019

IEEE Trans. Electron Devices

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Dynamic Reaction Mechanism of P–N-Switched H₂-Sensing Performance on a Pt-Decorated TiO₂ Surface

Zhou

Tao

Yue

et al. 2021

ACS Appl. Mater. Interfaces

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Pt decoration is known to be one of the most promising strategies to enhance the performance of TiO2 hydrogen gas sensors, while the effect of Pt-decorating concentration on the sensing performance of TiO2 and the specific interaction between Pt and TiO2 have not been fully investigated. Here, a series of TiO2 nanoarray thin films with differing amounts of Pt decorated (Pt/TiO2) is fabricated, and the H2-sensing performance is evaluated. A switch in the response from P-type to N-type is observed with increasing Pt decoration. The response additionally depends on the H2 concentration: resistance increases in low H2 concentrations and decreases in hydrogen concentrations higher than 40 ppm. This is explained by the competitive adsorption of hydrogen between the Pt nanoparticles (Pt NPs) and the exposed TiO2 surface. The preference for H2 adsorption and splitting between Pt and TiO2 is established by DFT calculations. Humidity brings preferential adsorption of H2O on the surface of Pt, which affects the following adsorption and splitting of H2, thus resulting in a P–N switch of the sensing performance. The detailed dynamic reaction process is described according to the findings.

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A Digital-to-Resistance Converter with an Automatic Offset Calibration Method for Evaluating Dynamic Performance of Resistive Sensor Readout Circuits

Nakagawa

Miyazaki

Ishikuro

2020

2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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Low-Power and ppm-Level Detection of Gas Molecules by Integrated Metal Nanosheets

Cited by 7 publications

References 7 publications

Low-Power and ppm-Level Multimolecule Detection by Integration of Self-Heated Metal Nanosheet Sensors

Low-Power and ppm-Level Multimolecule Detection by Integration of Self-Heated Metal Nanosheet Sensors

Dynamic Reaction Mechanism of P–N-Switched H₂-Sensing Performance on a Pt-Decorated TiO₂ Surface

A Digital-to-Resistance Converter with an Automatic Offset Calibration Method for Evaluating Dynamic Performance of Resistive Sensor Readout Circuits

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Low-Power and ppm-Level Detection of Gas Molecules by Integrated Metal Nanosheets

Cited by 7 publications

References 7 publications

Low-Power and ppm-Level Multimolecule Detection by Integration of Self-Heated Metal Nanosheet Sensors

Low-Power and ppm-Level Multimolecule Detection by Integration of Self-Heated Metal Nanosheet Sensors

Dynamic Reaction Mechanism of P–N-Switched H2-Sensing Performance on a Pt-Decorated TiO2 Surface

A Digital-to-Resistance Converter with an Automatic Offset Calibration Method for Evaluating Dynamic Performance of Resistive Sensor Readout Circuits

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Product

Resources

About

Dynamic Reaction Mechanism of P–N-Switched H₂-Sensing Performance on a Pt-Decorated TiO₂ Surface