Alcohol gas sensors capable of wireless detection using In2O3/Pt nanoparticles and Ag nanowires

Kim, So Yun; Kim, Joohee; Cheong, Woon Hyung; Lee, In Jun; Lee, Hujoong; Im, Hyeon Gyun; Kong, Hoyoul; Bae, Byung Seong; Park, Jang Ung

doi:10.1016/j.snb.2017.12.139

Cited by 49 publications

(37 citation statements)

References 40 publications

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“…The wearable pressure sensor was attached to the femorotibial joint of a robot connected to a wireless transmitter for the highly sensitive and wireless monitoring of the repeated lifting of the arm for reversibly touching the hand of the robot to the sensor (Figure g). The sensing performance was wirelessly communicated to a mobile phone for remote monitoring (Figure h) . Figure i–k shows the real‐time wireless sensing performance of the wearable pressure sensor in response to the repeated lifting of the arm for reversibly touching the sensor, demonstrating the reproducible and instant increase in conductivity from the increased backbone contact of the PANIH/C‐RGO@PU sponge and the interlocking of the PANIH arrays caused by larger bending motions (Movie S1, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

A Flexible Wearable Pressure Sensor with Bioinspired Microcrack and Interlocking for Full‐Range Human–Machine Interfacing

Guo

Zhong

et al. 2018

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Flexible wearable pressure sensors have drawn tremendous interest for various applications in wearable healthcare monitoring, disease diagnostics, and human–machine interaction. However, the limited sensing range (<10%), low sensing sensitivity at small strains, limited mechanical stability at high strains, and complicated fabrication process restrict the extensive applications of these sensors for ultrasensitive full‐range healthcare monitoring. Herein, a flexible wearable pressure sensor is presented with a hierarchically microstructured framework combining microcrack and interlocking, bioinspired by the crack‐shaped mechanosensory systems of spiders and the wing‐locking sensing systems of beetles. The sensor exhibits wide full‐range healthcare monitoring under strain deformations of 0.2–80%, fast response/recovery time (22 ms/20 ms), high sensitivity, the ultrasensitive loading sensing of a feather (25 mg), the potential to predict the health of patients with early‐stage Parkinson's disease with the imitated static tremor, and excellent reproducibility over 10 000 cycles. Meanwhile, the sensor can be assembled as smart artificial electronic skins (E‐skins) for simultaneously mapping the pressure distribution and shape of touching sensing. Furthermore, it can be attached onto the legs of a smart robot and coupled to a wireless transmitter for wirelessly monitoring human‐motion interactivities.

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Section: Resultsmentioning

confidence: 99%

A Flexible Wearable Pressure Sensor with Bioinspired Microcrack and Interlocking for Full‐Range Human–Machine Interfacing

Guo

Zhong

et al. 2018

Small

184

132

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“…In recent years, concurrent with the increased interest in the quality of human life, physiological monitoring systems for the diagnosis of diseases have received significant levels of attention. One such system is wearable biosensors, which are noninvasive and continuous platforms that enable the monitoring of people's vital signs and metabolites from various parts of the body, e.g., The measurements include physical vital signs, i.e., temperature, heart rate, and pulse, as well as metabolites, i.e., glucose, lactate, and alcohol from various parts of the body, including the epidermis, mouth, and eyes . Among the various body parts, the eyes have significant potential as sensing sites for monitoring biological signals .…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Smart Contact Lenses

Kim

Cha

Park

2019

Adv Materials Technologies

Self Cite

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The eyes can provide rich physiological information and offer broad diagnostic potential as a sensing site, making the use of contact lens sensors viable for noninvasive monitoring of many diseases and conditions. Therefore, extensive research efforts recently are devoted to the development of smart contact lenses for healthcare monitoring. Herein, physical biomarkers, which can be obtained from the eyes, and chemical biomarkers, which can be obtained from tears are discussed. Then, the latest advances in smart contact lenses with biosensors that diagnose diseases are reviewed. The subsequent content summarizes and classifies the techniques that can be used for the transmission of data based on the methods to deliver physiological information. In addition, representative examples of other devices for drug delivery energy storage are provided, and the challenges that should be overcome to develop smart contact lenses are discussed.

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“…The resistive ethanol sensors used semiconducting metal oxides (MOS) as sensing materials are popular due to their advantages, such as cheap, nontoxic, stable, simple processing, and higher sensitivity performance [6][7][8]. Typically, various nanostructured MOS including nanowires, nanoplates, hollow spheres, and heterostructures can greatly enhance the diffusion of analyte gases and facilitate the charge transport, leading to high sensitivity and fast sensing-recovery process [9][10][11][12][13][14][15][16][17][18]. However, most of the reported sensors are fabricated by drop-coating or screen printing the nanostructured MOS solution onto ceramic tubes or plates, which results in large sensor-to-sensor variations, large size, and high power consumption of 200-1000 mW [7,[19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Sensitive Cross-Linked SnO2:NiO Networks for MEMS Compatible Ethanol Gas Sensors

et al. 2020

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Nowadays, it is still technologically challenging to prepare highly sensitive sensing films using microelectrical mechanical system (MEMS) compatible methods for miniaturized sensors with low power consumption and high yield. Here, sensitive cross-linked SnO 2 :NiO networks were successfully fabricated by sputtering SnO 2 :NiO target onto the etched self-assembled triangle polystyrene (PS) microsphere arrays and then ultrasonically removing the PS microsphere templates in acetone. The optimum line width (~600 nm) and film thickness (~50 nm) of SnO 2 :NiO networks were obtained by varying the plasma etching time and the sputtering time. Then, thermal annealing at 500°C in H 2 was implemented to activate and reorganize the as-deposited amorphous SnO 2 :NiO thin films. Compared with continuous SnO 2 :NiO thin film counterparts, these cross-linked films show the highest response of 9 to 50 ppm ethanol, low detection limits (< 5 ppm) at 300°C, and also high selectivity against NO 2 , SO 2 , NH 3 , C 7 H 8 , and acetone. The gas-sensing enhancement could be mainly attributed to the creating of more active adsorption sites by increased stepped surface in cross-linked SnO 2 :NiO network. Furthermore, this method is MEMS compatible and of generality to effectively fabricate other cross-linked sensing films, showing the promising potency in the production of low energy consumption and wafer-scale MEMS gas sensors.

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Alcohol gas sensors capable of wireless detection using In2O3/Pt nanoparticles and Ag nanowires

Cited by 49 publications

References 40 publications

A Flexible Wearable Pressure Sensor with Bioinspired Microcrack and Interlocking for Full‐Range Human–Machine Interfacing

A Flexible Wearable Pressure Sensor with Bioinspired Microcrack and Interlocking for Full‐Range Human–Machine Interfacing

Recent Advances in Smart Contact Lenses

Sensitive Cross-Linked SnO2:NiO Networks for MEMS Compatible Ethanol Gas Sensors

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