A novel quartz-crystal microbalance humidity sensor based on solution-processible indium oxide quantum dots

Kan, Hao; Li, Min; Li, Hui; Li, Chong; Zhou, Jian; Fu, Chen; Luo, Jingting; Fu, Yongqing

doi:10.1039/c9ra06385d

Cited by 17 publications

(2 citation statements)

References 45 publications

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“…Moreover, extreme conditions of humidity have adverse effects on human health and are linked to many diseases . Different types of humidity sensors have been developed based on either solid-state devices, ,− flexible substrates, − inkjet printed textile, or textile fiber composite materials. ,− Most of these studies demonstrated the sensitivity of the sensor; however, only a few of these discussed the selectivity of the sensor, which is equally important. Moreover, in the case of textile-based humidity sensors, to the best of our knowledge, there is no report describing the selectivity of the textile sensors in the presence of interferences such as volatile organic compounds (VOCs).…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Metal–Organic Framework Textile Humidity Sensor

Rauf

Vijjapu

Andrés

et al. 2020

ACS Appl. Mater. Interfaces

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The increase in demand and popularity of smart textiles brings new and innovative ideas to develop a diverse range of textile-based devices for our daily life applications. Smart textile-based sensors (TEX sensors) become attractive due to the potential to replace current solid-state sensor devices with flexible and wearable devices. We have developed a smart textile sensor for humidity detection using a metal–organic framework (MOF) as an active thin-film layer. We show for the first time the use of the Langmuir–Blodgett (LB) technique for the deposition of a MIL-96(Al) MOF thin film directly onto the fabrics containing interdigitated textile electrodes for the fabrication of a highly selective humidity sensor. The humidity sensors were made from two different types of textiles, namely, linen and cotton, with the linen-based sensor giving the best response due to better coverage of MOF. The TEX sensor showed a reproducible response after multiple cycles of measurements. After 3 weeks of storage, the sensor showed a moderate decrease in response. Moreover, TEX sensors showed a high level of selectivity for the detection of water vapors in the presence of several volatile organic compounds (VOCs). Interestingly, the selectivity is superior to some of the previously reported MOF-coated solid-state interdigitated electrode devices and textile sensors. The method herein described is generic and can be extended to other textiles and coating materials for the detection of toxic gases and vapors.

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Section: Introductionmentioning

confidence: 99%

Highly Selective Metal–Organic Framework Textile Humidity Sensor

Rauf

Vijjapu

Andrés

et al. 2020

ACS Appl. Mater. Interfaces

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“…By exposing the sensor to different RH environments achieved through different saturated salt solutions, the humidity-sensing characteristics were studied. The RH of the saturated aqueous solutions of LiBr, LiCl, MgCl 2 , K 2 CO 3 , Mg(NO 3 ) 2 , KI, NaCl, KCl, and KNO 3 in a closed container are about 6.9%, 11.3%, 33.3%, 43.2%, 59.0%, 71.0%, 75.6%, 85.9%, and 95.4% at room temperature [32].…”

Section: Resultsmentioning

confidence: 99%

A confined carbon dot-based self-calibrated fluorescence probe for visible and highly sensitive moisture readouts

Ding¹,

Zheng²,

Lou³

et al. 2022

J. Phys. D: Appl. Phys.

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Excellent luminescent materials are essential for high-performance fluorescent nanosensors. Here, a new-type self-calibrated humidity sensor has been established through monitoring the fluorescent color change of carbon dots (CDs) confined in sodium hydroxide (CDs@NaOH). The CDs are prepared by a facile and rapid microwave assisted heating method using citric acid, urea, and NaOH as precursors. The confinement effect from NaOH has reduced the nonradiative transition and suppressed the aggregation-induced quenching of the CDs in solid. Compared with other sensors based on CD fluorescent visualization, the sensor has good linearity and wide humidity detection range from 6.9% to 95.4%. With the increased relative humidity, the fluorescence color of the sensor change from green to blue. The proposed sensing mechanism is due to the breaking and reforming of hydrogen bonds and proton transfer occurring at the CD-NaOH matrix interfaces. This finding suggests a potential role for the spatial confinement effect and may provide an avenue for developing highly sensitive humidity readouts.

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Graphene oxide quantum dots attached on wood-derived nanocellulose to fabricate a highly sensitive humidity sensor

Huang

Yang

et al. 2022

Carbohydrate Polymers

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A novel quartz-crystal microbalance humidity sensor based on solution-processible indium oxide quantum dots

Abstract: A high-performance QCM humidity sensor was prepared based on In2O3 QDs with a high specific surface area.

Cited by 17 publications

References 45 publications

Highly Selective Metal–Organic Framework Textile Humidity Sensor

Highly Selective Metal–Organic Framework Textile Humidity Sensor

A confined carbon dot-based self-calibrated fluorescence probe for visible and highly sensitive moisture readouts

Graphene oxide quantum dots attached on wood-derived nanocellulose to fabricate a highly sensitive humidity sensor

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