Dynamic chemical vapor sensing with nanofibrous film based surface acoustic wave sensors

Liu, Sai; Sun, Hongwei; Nagarajan, Ramaswamy; Kumar, Jayant; Gu, Zhiyong; Cho, JungHwan; Kurup, Pradeep

doi:10.1016/j.sna.2011.02.007

Cited by 33 publications

(19 citation statements)

References 25 publications

(24 reference statements)

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“…Liu et al [247] developed electrospun polyethylene (PEO) nanofibrous membrane based SAW gas sensors for detection of toluene, H 2 O 2 , isopropanol and nitrobenzene. PEO NFs were fabricated on an ST-cut quartz (42° angle with z -axis) SAW sensor.…”

Section: Reviewmentioning

confidence: 99%

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

Muhammad¹,

Motta²,

Shafiei³

2018

Beilstein J. Nanotechnol.

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Electrospun one-dimensional (1D) nanostructures are rapidly emerging as key enabling components in gas sensing due to their unique electrical, optical, magnetic, thermal, mechanical and chemical properties. 1D nanostructures have found applications in numerous areas, including healthcare, energy storage, biotechnology, environmental monitoring, and defence/security. Their enhanced specific surface area, superior mechanical properties, nanoporosity and improved surface characteristics (in particular, uniformity and stability) have made them important active materials for gas sensing applications. Such highly sensitive and selective elements can be embedded in sensor nodes for internet-of-things applications or in mobile systems for continuous monitoring of air pollutants and greenhouse gases as well as for monitoring the well-being and health in everyday life. Herein, we review recent developments of gas sensors based on electrospun 1D nanostructures in different sensing platforms, including optical, conductometric and acoustic resonators. After explaining the principle of electrospinning, we classify sensors based on the type of materials used as an active sensing layer, including polymers, metal oxide semiconductors, graphene, and their composites or their functionalized forms. The material properties of these electrospun fibers and their sensing performance toward different analytes are explained in detail and correlated to the benefits and limitations for every approach.

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Section: Reviewmentioning

confidence: 99%

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

Muhammad¹,

Motta²,

Shafiei³

2018

Beilstein J. Nanotechnol.

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“…The fundamental sensing mechanism of the SAW sensors relied on monitoring the change in the velocity of an acoustic wave on a piezoelectric substrate surface caused by the adsorption of analytes. The change in electrical conductivity or mass of the sensing layer perturbs the propagation velocity of acoustic wave due to the mechanical and piezoelectric effects; accordingly, the resonant frequency of the SAW sensor is [39]. © 2011 Elsevier; b: Reprinted with permission from Wang et al [40].…”

Section: Surface Acoustic Wave (Saw) Sensormentioning

confidence: 99%

“…Liu et al [39] reported that dynamic chemical vapor SAW sensors have been developed by depositing electrospun polyethylene oxide nanofibrous membranes on the surface of ST-cut quartz; the response time of the sensors was 5 min (Fig. 11.2a).…”

Section: Surface Acoustic Wave (Saw) Sensormentioning

confidence: 99%

Electrospun Nanofiber-Based Sensors

Wang

Ding

2014

Nanostructure Science and Technology

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Monitoring of usable, explosive, and hazardous materials (gases, heavy metal ions, and organic contaminants) is one of the most important concerns that has attracted growing attention in the past few decades. Numerous sensors have been developed to meet the demands and the pursuit of highly sensitive, selective, reversible, fast response and recovery, cost-effective, and portable sensors which have gained great interest. Electrospun nanofibrous membranes that possess large surface area, high porosity, good interconnected porous structure, and flexibility of surface functionalization are expected to be ideal candidates of substrates to improve the performance of the sensors. More interestingly, the novel two-dimensional nanofiber/net membranes fabricated by electrospinning/netting are demonstrated to have extremely large surface area and unique pore structure, which could further enhance the sensitivity, stability, and response speed of the sensors. In this chapter, we summarize recent progress in the development of electrospun nanofiber-based sensors, describe the design of different types of sensors, and discuss their sensing performances in detail. This chapter might bring further development and evolution of sensors based on electrospun nanofibers for the detection of various analytes.

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“…Regarding the rapid development of acoustic wave technology in the last decade, surface acoustic wave devices have been widely used in sensor applications for detection of both physical [1], [2] and chemical [3]- [5] quantities due to their great sensitivity to wide variety of parameters such as temperature [6], pressure [7], humidity [8], mass loading [9], and conductivity [10]. Furthermore, the surface acoustic wave devices exhibit excellent advantages such as small size, high Manuscript reliability and reproducibility, excellent stability, high sensitivity, low cost, and fast response time [11].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Sensitivity Induced by Substrate Strain Rate for Surface Acoustic Wave Yarn Tension Sensor

Lei

Chen

et al. 2015

IEEE Sensors J.

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In this paper, we propose a novel sensitivity optimization design scheme for the yarn tension sensor using surface acoustic wave (SAW) device by improving the strain rate of the SAW yarn tension sensor substrate. The yarn tension sensor, operating at 169.4 MHz, is designed as an oscillator fabricated on a 42°Y-X quartz substrate. Based on regression analysis and finite element analysis, two mathematical models are established and a linear programming model is built to obtain the best sensitivity. Moreover, the determination coefficients of the two mathematical models both are greater than 0.99, which means that the regression models fit the experimental data exactly. The linear programming results show that the maximum sensitivity will be achieved when the SAW yarn tension sensor substrate length is 19 mm and its width is 3 mm within a fixed interval of the substrate size. The SAW yarn tension sensor with the size of 19 × 3 mm was fabricated. Experimental results show that the actual optimal sensitivity 3.13 kHz/g was obtained, confirming that the sensitivity optimization design scheme is effective and applicable.Index Terms-Surface acoustic wave device, regression analysis, finite element analysis, linear programming, yarn tension. 1530-437X (c)

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Dynamic chemical vapor sensing with nanofibrous film based surface acoustic wave sensors

Cited by 33 publications

References 25 publications

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

Electrospun Nanofiber-Based Sensors

Optimization of Sensitivity Induced by Substrate Strain Rate for Surface Acoustic Wave Yarn Tension Sensor

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