Quartz crystal microbalance coated by PAN nanofibers and PEDOT:PSS for humidity sensor

Hidayat, Shidiq Nur; Julian, Trisna; Rianjanu, Aditya; Kusumaatmadja, Ahmad; Triyana, Kuwat; Roto,

doi:10.1109/issimm.2017.8124274

Cited by 19 publications

(13 citation statements)

References 18 publications

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“…Electrospinning is a simple, reproducible, continuous, versatile, and efficient process used to fabricate long nanofibers on a large scale using a rich variety of materials. Recent studies have focused on using this technique for various applications, such as with affinity membranes, for drug release, tissue scaffolds, sensors, as protective clothing agents, and in the fields of energy, electronic devices, and composite reinforcement [ 1 , 2 , 3 , 4 , 5 , 6 ], mainly because of the remarkable properties of electrospun nanofibers, such as a small diameter, high aspect ratio, large specific surface area, and unique physical and chemical properties [7] . The polymers commonly used for fabricating the electrospun nanofiber membrane are polyvinylidene fluoride (PVDF) [8] , polysulfone (PSU) [9] , polyacrylonitrile (PAN) [10] , polyethersulfone [11] , polyamide (PA) [12] , and polyvinyl alcohol (PVA) [ 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Solvent vapor treatment improves mechanical strength of electrospun polyvinyl alcohol nanofibers

Rianjanu

Kusumaatmaja

Suyono

et al. 2018

Heliyon

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Electrospun nanofibers of polyvinyl alcohol (PVA) have poor mechanical strength. As such their use has often been avoided, particularly in applications that require high mechanical properties. The objective of this study is to increase the mechanical properties of PVA nanofiber mats via physical crosslinking with solvent vapor treatment using organic solvents, dimethyl sulfoxide (DMSO), N, N-dimethyl formamide (DMF), and methanol. The effect of solvent vapor treatment on PVA nanofibers is clearly observed by scanning electron microscope (SEM). The tensile strength increased by over 60%, 90%, and 115% after solvent vapor treatment with DMF at a temperature of 40 °C for 2 h, 4 h, and 8 h, respectively, compared to untreated PVA nanofibers. In addition, Young's modulus of PVA nanofiber mats also increased after DMF treatment. As a comparison, DMSO and methanol were also used in solvent vapor treatment because of differences in their polymer-solvent affinity. Results showed that the highest improvement (100%) in mechanical strength was obtained using DMF. This study shows that solvent vapor treatment offers a simple and inexpensive method that provides excellent results and is a promising alternative treatment for use in increasing the mechanical properties of electrospun nanofibers.

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Section: Introductionmentioning

confidence: 99%

Solvent vapor treatment improves mechanical strength of electrospun polyvinyl alcohol nanofibers

Rianjanu

Kusumaatmaja

Suyono

et al. 2018

Heliyon

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“…Quartz crystal microbalance (QCM) is one example of acoustic wave sensor platform based on acoustic-electric effect and mass deposition. The QCM sensor offers accurate, real-time, and convenient detection of gases or vapors [ 12 , 13 ] and humidity [ 14 ]. Nanostructured materials have become one of the most studied materials for devices, especially those used for gas sensing [ 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

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

Rianjanu

Roto

Julian

et al. 2018

Sensors

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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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“…It provides a highly sensitive, real-time, and low-cost method for vapor detection and is often used for gas/vapor [5][6][7] and humidity [8,9] detection. The sensitivity and selectivity of the QCM system can be improved by coating the electrode with specific materials, including polymers [9,10], metal oxides [11], and other functional materials [12]. Chitosan is one of the natural polysaccharide polymers containing the hydroxyl (-OH) and amino (-NH 2 ) groups.…”

Section: Introductionmentioning

confidence: 99%

Chitosan-Based Quartz Crystal Microbalance for Alcohol Sensing

et al. 2018

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Short-chain alcohols are a group of volatile organic compounds (VOCs) that are often found in workplaces and laboratories, as well as medical, pharmaceutical, and food industries. Real-time monitoring of alcohol vapors is essential because exposure to alcohol vapors with concentrations of 0.15–0.30 mg·L−1 may be harmful to human health. This study aims to improve the detection capabilities of quartz crystal microbalance (QCM)-based sensors for the analysis of alcohol vapors. The active layer of chitosan was immobilized onto the QCM substrate through a self-assembled monolayer of L-cysteine using glutaraldehyde as a cross-linking agent. Before alcohol analysis, the QCM sensing chip was exposed to humidity because water vapor significantly interferes with QCM gas sensing. The prepared QCM sensor chip was tested for the detection of four different alcohols: n-propanol, ethanol, isoamyl alcohol, and n-amyl alcohol. For comparison, a non-alcohol of acetone was also tested. The prepared QCM sensing chip is selective to alcohols because of hydrogen bond formation between the hydroxyl groups of chitosan and the analyte. The highest response was achieved when the QCM sensing chip was exposed to n-amyl alcohol vapor, with a sensitivity of about 4.4 Hz·mg−1·L. Generally, the sensitivity of the QCM sensing chip is dependent on the molecular weight of alcohol. Moreover, the developed QCM sensing chips are stable after 10 days of repeated measurements, with a rapid response time of only 26 s. The QCM sensing chip provides an alternative method to established analytical methods such as gas chromatography for the detection of short-chain alcohol vapors.

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Quartz crystal microbalance coated by PAN nanofibers and PEDOT:PSS for humidity sensor

Cited by 19 publications

References 18 publications

Solvent vapor treatment improves mechanical strength of electrospun polyvinyl alcohol nanofibers

Solvent vapor treatment improves mechanical strength of electrospun polyvinyl alcohol nanofibers

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

Chitosan-Based Quartz Crystal Microbalance for Alcohol Sensing

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