Ultrafast-response/recovery capacitive humidity sensor based on arc-shaped hollow structure with nanocone arrays for human physiological signals monitoring

Niu, Hongsen; Yue, Wenjing; Li, Yang; Yin, Feifei; Gao, Song; Zhang, Chunwei; Kan, Hao; Yao, Zhao; Jiang, Chengpeng; Wang, Cong

doi:10.1016/j.snb.2021.129637

Cited by 62 publications

(46 citation statements)

References 77 publications

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“…Therefore, real-time monitoring of respiration is of great significance for respiratory disease diagnosis. In view of the importance and significance of respiratory monitoring, recently, many studies have used humidity sensors to monitor breathing, − making respiratory monitoring a hot application of humidity sensors. The schematic diagram of human respiration detection with a QCM humidity sensor is presented in Figure a.…”

Section: Results and Discussionmentioning

confidence: 99%

MoS₂/Graphene Oxide/C₆₀-OH Nanostructures Deposited on a Quartz Crystal Microbalance Transducer for Humidity Sensing

Tang

Chen

Ding

et al. 2021

ACS Appl. Nano Mater.

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In this work, MoS 2 /graphene oxide (GO)/C 60 -OH nanocomposites are synthesized by a hydrothermal method and deposited on a quartz crystal microbalance (QCM) transducer for humidity detection. Microscopic characterization shows that the nanocomposites are composed of GO/C 60 -OH composite encapsulated MoS 2 nanoflowers. The QCM humidity sensor with MoS 2 /GO/C 60 -OH nanocomposites as the sensing film demonstrates an excellent response and recovery times (1.3/1.2 s), which are shorter than most QCM humidity sensors proposed at present. Meanwhile, the QCM humidity sensor has a high sensitivity (31.8 Hz/% RH), which is approximately 3 times that of the QCM humidity sensor based on pure GO. It is possible that the support of MoS 2 nanoflowers significantly weakens the stacking effect of GO films and accelerates the diffusion rate of water molecules in the composites. Besides this, the addition of C 60 -OHs can also greatly increase water absorption sites in the composites, thus improving the sensor's humidity-sensitive response. Owing to its fast response/recovery rate, the proposed MoS 2 /GO/C 60 -OH-based QCM humidity sensor can be used for human respiratory status detection with digital frequency output signals.

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Section: Results and Discussionmentioning

confidence: 99%

MoS₂/Graphene Oxide/C₆₀-OH Nanostructures Deposited on a Quartz Crystal Microbalance Transducer for Humidity Sensing

Tang

Chen

Ding

et al. 2021

ACS Appl. Nano Mater.

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“…In recent years, various high-performance flexible humidity sensors have been developed, which could monitor the humidity of the external environment and human skin, as well as the water molecules in the exhalation. [112] Especially, the latter plays an important role in the detection of human health state. [113][114][115][116][117][118][119][120] Actually, only realizing the humidity sensing function without response to other physiological signals (such as pulse, heartbeat, etc.)…”

Section: Pressure/strain-humidity Detectionmentioning

confidence: 99%

Recent Advances in Carbon Material‐Based Multifunctional Sensors and Their Applications in Electronic Skin Systems

Guo

Xiao

Gao

et al. 2021

Adv Funct Materials

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134

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Electronic skin (e‐skin) is driving significant advances in flexible electronics as it holds great promise in health monitoring, human–machine interfaces, soft robotics, and so on. Flexible sensors that can detect various stimuli or have multiple properties play an indispensable role in e‐skin. Despite tremendous research efforts devoted to flexible sensors with excellent performance regarding a certain sensing mode or property, emerging e‐skin demands multifunctional flexible sensors to be endowed with the skin‐like capability and beyond. Considering outstanding superiorities of electrical conductivity, chemical stability, and ease of functionalization, carbon materials are adopted to implement multifunctional flexible sensors. In this review, the latest advances of carbon‐based multifunctional flexible sensors with regard to the types of detection modes and abundant properties are introduced. The corresponding preparation process, device structure, sensing mechanism, obtained performance, and intriguing applications are highlighted. Furthermore, diverse e‐skin systems by integrating current cutting‐edge technologies (e.g., data acquisition and transmission, neuromorphic technology, and artificial intelligence) with carbon‐based multifunctional flexible sensors are systematically investigated in detail. Finally, the existing problems and future developing directions are also proposed.

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“…This is because the air is squeezed out and the volume fraction occupied by it decreases, increasing the effective dielectric constant (air has a lower dielectric constant than elastomer), when the structured film is compressed. [38] Following the general Lichterecker mixing rule, [81,82] the effective dielectric constant of the sensing layer can be defined as,…”

Section: Capacitive Tactile Sensorsmentioning

confidence: 99%

Micro‐Nano Processing of Active Layers in Flexible Tactile Sensors via Template Methods: A Review

Niu

Zhang

Yue

et al. 2021

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Ultrafast-response/recovery capacitive humidity sensor based on arc-shaped hollow structure with nanocone arrays for human physiological signals monitoring

Cited by 62 publications

References 77 publications

MoS₂/Graphene Oxide/C₆₀-OH Nanostructures Deposited on a Quartz Crystal Microbalance Transducer for Humidity Sensing

MoS₂/Graphene Oxide/C₆₀-OH Nanostructures Deposited on a Quartz Crystal Microbalance Transducer for Humidity Sensing

Recent Advances in Carbon Material‐Based Multifunctional Sensors and Their Applications in Electronic Skin Systems

Micro‐Nano Processing of Active Layers in Flexible Tactile Sensors via Template Methods: A Review

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Ultrafast-response/recovery capacitive humidity sensor based on arc-shaped hollow structure with nanocone arrays for human physiological signals monitoring

Cited by 62 publications

References 77 publications

MoS2/Graphene Oxide/C60-OH Nanostructures Deposited on a Quartz Crystal Microbalance Transducer for Humidity Sensing

MoS2/Graphene Oxide/C60-OH Nanostructures Deposited on a Quartz Crystal Microbalance Transducer for Humidity Sensing

Recent Advances in Carbon Material‐Based Multifunctional Sensors and Their Applications in Electronic Skin Systems

Micro‐Nano Processing of Active Layers in Flexible Tactile Sensors via Template Methods: A Review

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Product

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MoS₂/Graphene Oxide/C₆₀-OH Nanostructures Deposited on a Quartz Crystal Microbalance Transducer for Humidity Sensing

MoS₂/Graphene Oxide/C₆₀-OH Nanostructures Deposited on a Quartz Crystal Microbalance Transducer for Humidity Sensing