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Polyacrylonitrile Nanofiber-Based Quartz Crystal Microbalance for Sensitive Detection of Safrole.

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TLDR
The proposed polyacrylonitrile nanofiber-based quartz crystal microbalance (QCM) method is simple, inexpensive, and convenient for detecting safrole, and can be an alternative to conventional instrumental analytical methods for general volatile compounds.
Abstract
Safrole is the main precursor for producing the amphetamine-type stimulant (ATS) drug, N-methyl-3,4-methylenedioxyamphetamine (MDMA), also known as ecstasy. We devise a polyacrylonitrile (PAN) nanofiber-based quartz crystal microbalance (QCM) for detecting safrole. The PAN nanofibers were fabricated by direct electrospinning to modify the QCM chips. The PAN nanofiber on the QCM chips has a diameter of 240 ± 10 nm. The sensing of safrole by QCM modified with PAN nanofiber shows good reversibility and an apparent sensitivity of 4.6 Hz·L/mg. The proposed method is simple, inexpensive, and convenient for detecting safrole, and can be an alternative to conventional instrumental analytical methods for general volatile compounds.

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Gas and humidity sensing with quartz crystal microbalance (QCM) coated with graphene-based materials – A mini review

TL;DR: In this article, the authors summarize the recent progress on QCM gas sensors and QCM humidity sensors based on graphene materials and graphene composites, and the challenges for future works related to the development of QCM sensors coated by graphene materials or graphene composite materials.
Journal ArticleDOI

Quartz crystal microbalance humidity sensors integrated with hydrophilic polyethyleneimine-grafted polyacrylonitrile nanofibers

TL;DR: In this article, a PAN/PEI nanofiber-functionalized quartz crystal microbalance (QCM) sensors were developed for humidity sensing, which exhibited a sensitivity of up to 164 Hz/%rH with the response and recovery times of 13 and 7 s, respectively, during humidity exposure assessments performed at room temperature of 30 ± 1) °C.
Journal ArticleDOI

Chitosan-Based Quartz Crystal Microbalance for Alcohol Sensing

TL;DR: In this paper, a quartz crystal microbalance (QCM)-based sensor was used for the analysis of short-chain VOCs. But the QCM sensing chip was exposed to humidity because water vapor significantly interferes with QCM gas sensing.
Journal ArticleDOI

Intelligent Mobile Electronic Nose System Comprising a Hybrid Polymer-Functionalized Quartz Crystal Microbalance Sensor Array.

TL;DR: A low-cost mobile electronic nose (e-nose) system using a quartz crystal microbalance (QCM) sensor array functionalized with various polymer-based thin active films that works based on the gravimetric detection principle for reliable qualitative and quantitative analyses in complex gaseous mixtures containing numerous VOCs for early disease diagnosis and environmental quality monitoring.
References
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Journal ArticleDOI

Verwendung von Schwingquarzen zur Wägung dünner Schichten und zur Mikrowägung

TL;DR: In this paper, eigenfrequenz der Platte infolge Vergroserung der schwingenden Masse is vermessen, so das eine empirische Eichung bei der Schichtwagung mit Schwingquarzen entfallt.
Journal ArticleDOI

Gas Sensors Based on Conducting Polymers

Hua Bai, +1 more
- 07 Mar 2007 - 
TL;DR: In this article, a review of gas sensors fabricated by using conducting polymers such as polyaniline (PAni), polypyrrole (PPy) and poly (3,4-ethylenedioxythiophene) (PEDOT) as the active layers has been reviewed.
Journal ArticleDOI

Metal Oxide Nanostructures and Their Gas Sensing Properties: A Review

TL;DR: The gas sensing properties of metal oxide nanostructures assembled by nanoparticles are reviewed in this article and the effect of doping is summarized and the perspectives ofMetal oxide gas sensor are given.
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