Recent developments in self-powered smart chemical sensors for wearable electronics

Aaryashree, Aaryashree; Sahoo, Surjit; Walke, Pravin S.; Nayak, Saroj K.; Rout, Chandra Sekhar; Late, Dattatray J.

doi:10.1007/s12274-021-3330-8

Cited by 89 publications

(34 citation statements)

References 177 publications

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“…In conclusion, we believe that this work can open the way toward real applications of Ni/bP films in high performance and wearable sensors, which represent the next generation of electronics technology …”

Section: Discussionmentioning

confidence: 82%

Air Stable Nickel-Decorated Black Phosphorus and Its Room-Temperature Chemiresistive Gas Sensor Capabilities

Valt

Caporali

Fabbri

et al. 2021

ACS Appl. Mater. Interfaces

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In the rapidly emerging field of layered twodimensional functional materials, black phosphorus, the Pcounterpart of graphene, is a potential candidate for various applications, e.g., nanoscale optoelectronics, rechargeable ion batteries, electrocatalysts, thermoelectrics, solar cells, and sensors. Black phosphorus has shown superior chemical sensing performance; in particular, it is selective for the detection of NO 2 , an environmental toxic gas, for which black phosphorus has highlighted high sensitivity at a ppb level. In this work, by applying a multiscale characterization approach, we demonstrated a stability and functionality improvement of nickel-decorated black phosphorus films for gas sensing prepared by a simple, reproducible, and affordable deposition technique. Furthermore, we studied the electrical behavior of these films once implemented as functional layers in gas sensors by exposing them to different gaseous compounds and under different relative humidity conditions. Finally, the influence on sensing performance of nickel nanoparticle dimensions and concentration correlated to the decoration technique and film thickness was investigated.

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Section: Discussionmentioning

confidence: 82%

Air Stable Nickel-Decorated Black Phosphorus and Its Room-Temperature Chemiresistive Gas Sensor Capabilities

Valt

Caporali

Fabbri

et al. 2021

ACS Appl. Mater. Interfaces

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“…Wearable electronic devices can conform to the skin to capture mechanical 1 , thermal 2 , chemical 3 , electrical 4 , and biological signals 5 , 6 for future health monitoring. The increasing interest in personal air quality monitoring and breath analysis has also spurred the demand for wearable gas sensors to accurately and continuously detect various health-relevant gases 7 – 9 .…”

Section: Introductionmentioning

confidence: 99%

Moisture-resistant, stretchable NOx gas sensors based on laser-induced graphene for environmental monitoring and breath analysis

et al. 2022

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The accurate, continuous analysis of healthcare-relevant gases such as nitrogen oxides (NOx) in a humid environment remains elusive for low-cost, stretchable gas sensing devices. This study presents the design and demonstration of a moisture-resistant, stretchable NOx gas sensor based on laser-induced graphene (LIG). Sandwiched between a soft elastomeric substrate and a moisture-resistant semipermeable encapsulant, the LIG sensing and electrode layer is first optimized by tuning laser processing parameters such as power, image density, and defocus distance. The gas sensor, using a needlelike LIG prepared with optimal laser processing parameters, exhibits a large response of 4.18‰ ppm−1 to NO and 6.66‰ ppm−1 to NO2, an ultralow detection limit of 8.3 ppb to NO and 4.0 ppb to NO2, fast response/recovery, and excellent selectivity. The design of a stretchable serpentine structure in the LIG electrode and strain isolation from the stiff island allows the gas sensor to be stretched by 30%. Combined with a moisture-resistant property against a relative humidity of 90%, the reported gas sensor has further been demonstrated to monitor the personal local environment during different times of the day and analyze human breath samples to classify patients with respiratory diseases from healthy volunteers. Moisture-resistant, stretchable NOx gas sensors can expand the capability of wearable devices to detect biomarkers from humans and exposed environments for early disease diagnostics.

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“…Two-dimensional (2D) material community has attracted tremendous intention in the field of gas sensing on account of the large surface area, tailorable electronic properties, and abundant adsorption sites since the pioneering graphene exploration. − Of these, layered molybdenum disulfide (MoS 2 ) as a typical representative has manifested favorable humidity sensing compared with graphene of faint sensing and black phosphorous of vulnerable degradation under a wet atmosphere whereas hindered by constrained sensitivity especially at trace relative humidity (RH), weak robustness, and easy aggregation/restacking during wet film preparation . To overcome these obstacles, various doping strategies were employed.…”

Section: Introductionmentioning

confidence: 99%

Dual Resistance and Impedance Investigation: Ultrasensitive and Stable Humidity Detection of Molybdenum Disulfide Nanosheet-Polyethylene Oxide Hybrids

Wang

Zhou

Xie

et al. 2021

ACS Appl. Mater. Interfaces

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There is an imperative demand for real-time relative humidity (RH) discrimination with excellent sensitivity and robust operation stability over a broad RH range at room temperature (22 °C). Of diverse two-dimensional (2D) materials, p-type molybdenum disulfide (MoS2) as a typical gas-sensing candidate has been rarely harnessed for humidity detection due to tiny response and undesirable stability induced by the conversion from electron to proton conduction with increasing RH. To overcome these issues, MoS2-polyethylene oxide (PEO) inorganic–organic nanocomposites as the sensing layer were facilely prepared in this work. The results showed that the composition-optimized composite film sensor surpassed the isolated MoS2 counterpart in terms of repeatability, response, hysteresis, stability, and selectivity. Both DC-resistance and AC-impedance analyses unveiled different roles of MoS2 and PEO components within composites. MoS2 strengthened the film structure, while hydrophilic PEO enlarged the water-adsorption capacity and thus improved the response and detection reliability via water-triggered ionic conductivity. This work afforded a feasible strategy via inorganic–organic combination to distinguish trace RH and improved the operation stability of 2D material-based sensors, simultaneously demonstrating realistic monitoring applications of exhaled gas detection and distance variation of moisture-emitting objects.

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Recent developments in self-powered smart chemical sensors for wearable electronics

Cited by 89 publications

References 177 publications

Air Stable Nickel-Decorated Black Phosphorus and Its Room-Temperature Chemiresistive Gas Sensor Capabilities

Air Stable Nickel-Decorated Black Phosphorus and Its Room-Temperature Chemiresistive Gas Sensor Capabilities

Moisture-resistant, stretchable NOx gas sensors based on laser-induced graphene for environmental monitoring and breath analysis

Dual Resistance and Impedance Investigation: Ultrasensitive and Stable Humidity Detection of Molybdenum Disulfide Nanosheet-Polyethylene Oxide Hybrids

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