Electrospun nanofibrous membranes coated quartz crystal microbalance as gas sensor for NH3 detection

Ding, Bin; Kim, Jin-Ho; Miyazaki, Yasuo; Shiratori, Seimei

doi:10.1016/j.snb.2004.04.008

Cited by 237 publications

(110 citation statements)

References 26 publications

(32 reference statements)

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“…Self-assembled nanostructures are gaining attention in the fields of tissue engineering, drug delivery, sensing, catalysis and energy harvesting/storage [1][2][3][4][5][6][7][8]. In particular, nanofiber materials are of great interest because of their long length scales, resulting in very high aspect ratios, and the high degree of fiber orientation possible.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically Structured Electrospun Fibers

Zander

2013

Polymers

125

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Abstract:Traditional electrospun nanofibers have a myriad of applications ranging from scaffolds for tissue engineering to components of biosensors and energy harvesting devices. The generally smooth one-dimensional structure of the fibers has stood as a limitation to several interesting novel applications. Control of fiber diameter, porosity and collector geometry will be briefly discussed, as will more traditional methods for controlling fiber morphology and fiber mat architecture. The remainder of the review will focus on new techniques to prepare hierarchically structured fibers. Fibers with hierarchical primary structures-including helical, buckled, and beads-on-a-string fibers, as well as fibers with secondary structures, such as nanopores, nanopillars, nanorods, and internally structured fibers and their applications-will be discussed. These new materials with helical/buckled morphology are expected to possess unique optical and mechanical properties with possible applications for negative refractive index materials, highly stretchable/high-tensile-strength materials, and components in microelectromechanical devices. Core-shell type fibers enable a much wider variety of materials to be electrospun and are expected to be widely applied in the sensing, drug delivery/controlled release fields, and in the encapsulation of live cells for biological applications. Materials with a hierarchical secondary structure are expected to provide new superhydrophobic and self-cleaning materials.

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Section: Introductionmentioning

confidence: 99%

Hierarchically Structured Electrospun Fibers

Zander

2013

Polymers

125

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“…This fast response of the ZNF with Au electrode for both adsorption and desorption is believed to be due to the high surface to volume ratio of the one-dimensional nanodetector. 38,39 The physisorption and chemisorption of water molecule on ZnO nanofibers surface are shown in figure 9. Table IV shows the comparison of the performance of our nanofibers with a few recently reported metal oxide RH sensors.…”

Section: Modulusmentioning

confidence: 99%

Effect of different electrodes on the transport properties of ZnO nanofibers under humid environment

et al. 2015

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Relative humidity (RH) sensing properties of zinc oxide nanofibers (ZNF), synthesized using electrospinning technique, were studied by impedance spectroscopy. RH sensors were fabricated with two different electrodes (Au and Ni) using lithography on top of the nanofibers deposited on Si/SiO2 substrate. Compare with the Ni electrode sensor, Au electrode sensor exhibits larger sensitivity and quicker response/recovery. Capacitance, electrical conductivity and electrical modulus were studied at 40%-90% RH as a function of the frequency of the applied AC signal in the frequency range of 10−2-106 Hz. The corresponding response and recovery times are 3s and 5s for Au, and 6s and 10s for Ni electrode sensor, respectively. The sensors exhibited a reversible response with small hysteresis of less than 4% and 12% for Au and Ni electrodes respectively. Stability of the sensor device with Au electrode was confirmed by testing the device for 13 days. The excellent sensing characteristics and comparison of sensors with different electrode materials may offer an effective route for designing and optimizing RH sensors.

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“…However, handheld sensors are desirable for on-site detection of volatile molecules. Quartz crystal microbalances (QCMs) [9,10], electrochemical analyzers for the detection of resistance changes in conducting polymers [11,12], and optical fibers [13] are candidates for handheld sensor devices, after previous experiments were performed combining electrospun nanofibers for the development of sensors that detect gases such as VOCs, NH3, NO2, alcohols, and CO2 [14]. A QCM device, which is a mass-sensitive device, is advantageous owing to its potential for incorporation into portable devices [15].…”

Section: Introductionmentioning

confidence: 99%

“…Various inorganic and organic materials are employed as receptors for gases, including indium tin oxide for NO detection [16], graphene for NO2 and NH3 detection [17], polyacrylic acid (PAA) for NH3 detection [9,10], and imprinted polymers of PAA or methacrylic acid for the detection of VOCs [18]. To capture organic and biological odorant molecules, various biomaterials are used, including lipids for fruit-flavor detection [19], enzymes for toluene detection [20], and olfactory receptors for the detection of various volatile molecules [3,21].…”

Section: Introductionmentioning

confidence: 99%

Detection of Odorant Molecules in the Gaseous Phase Using α-, β-, and γ-Cyclodextrin Films on a Quartz Crystal Microbalance

et al. 2018

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Abstract:There is an interest in sensors for the detection of odorant molecules in the gaseous phase, especially those related to the fragrance of fruits, because odorant sensing is useful for on-site quality control of agricultural products. Previously, gas-chromatographic methods requiring bench-top devices were used for odorant-molecule detection. Herein, we report an odorant sensor based on cyclodextrins (CDs) as a stable odorant receptor, using a highly mass-sensitive and quantitative 27-MHz quartz crystal microbalance (QCM) device, which has the advantage of possible incorporation into portable devices. When ethyl butyrate (a model odorant molecule for fruit fragrances) was flowed onto a QCM plate modified with α-, β-, or γ-CD network films, a decrease in frequency was observed (corresponding to an increase in mass), owing to the capture of odorant molecules by CD molecules. The CD films were capable of capturing and releasing odorant molecules, depending on the type of CD (α-, β-, or γ-CD). Thus, these sensors are reusable for odorant-molecule sensing, and are applicable to pattern recognition of odorant molecules. Thus, sensors based on CD films combined with a QCM handheld device could be applied to monitoring the condition of fruits.

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Electrospun nanofibrous membranes coated quartz crystal microbalance as gas sensor for NH3 detection

Cited by 237 publications

References 26 publications

Hierarchically Structured Electrospun Fibers

Hierarchically Structured Electrospun Fibers

Effect of different electrodes on the transport properties of ZnO nanofibers under humid environment

Detection of Odorant Molecules in the Gaseous Phase Using α-, β-, and γ-Cyclodextrin Films on a Quartz Crystal Microbalance

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