The fabrication and gas sensing application of a fast-responding m-CP-PVP composite film/potassium ion-exchanged glass optical waveguide

Zhu, Min; Kari, Nuerguli; Yin, Yan; Yimit, Abliz

doi:10.1039/c7ay01541k

Cited by 20 publications

(7 citation statements)

References 39 publications

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“…The aromatic C = C stretching occurs at 1,601 cm −1 and 1,510 cm −1 , and all C = C-H out-of-plane bending bands are allocated to the region of 900 to 700 cm −1 . These findings are consistent with those reported in the literature (Wang, Liu, & Igor, 2013;Zhu, Kari, Yan, & Yimit, 2017). The infrared spectrum of phenol red exhibited similar vibrational features as that of m-cresol purple, with C = O stretching band at 1,628 cm −1 , S = O asymmetric stretching band at 1,341 cm −1 , S = O symmetric stretching band at 1,167 cm −1 , and aromatic C = C stretching bands at 1,589 cm −1 and 1,489 cm −1 .…”

Section: Food Engineering Materialssupporting

confidence: 93%

An inkjet‐printed sulfonephthalein dye indicator array for volatile amine detection

Luo

Lim

2020

Journal of Food Science

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Colorimetric indicators are versatile for applications such as intelligent food packaging, for reflecting the actual quality and/or monitoring distribution history of food products. In this study, a colorimetric indicator array composed of sulfonephthalein dyes was successfully developed by piezoelectric inkjet printing, for the detection of volatile aminesthe primary spoilage gases for fish and seafood products. The printing inks were formulated in water/ethanol/1-butanol mixture. By refilling the printer's cartridges with our formulated inks and controlling the red, green, and blue color parameters, a 7 × 9 indicator array was printed onto inkjet transparency films. The color response of the indicator array was tested with different volatile amines at various concentrations. The array indicator was capable of discriminating six different volatile amines: ammonia, trimethylamine, dimethylamine, triethylamine, piperidine, and hydrazine. The printability of the inks was investigated by characterizing their density, surface tension, and dynamic viscosity, dictating that all formulated inks were printable fluid. The microstructural morphologies of the printed dyes on transparency films were evaluated using scanning electron microscopy. Interactions of the dye with the volatiles were studied by Fourier transform infrared spectroscopy. In summary, the piezoelectric inkjet printing method presented in this study offers a convenient, efficient, and flexible means to fabricate colorimetric indicators for detecting food spoilage volatiles. These indicators are promising as sensing components in intelligent packaging systems, to reveal the freshness of fish products by correlating with quality parameters such as total volatile basic nitrogen, microbial growth, and sensory attributes. Further studies on the feasibility of using the array indicators in real food packaging systems, development of strategy to mitigate the potential migration of the indicator dyes, and designing array patterns optimal for machine/human interpretation, are important to commercialize the technology.Practical Application: Piezoelectric inkjet printing offers a convenient way to fabricate sensing materials and aligns with industrial packaging operations. The use of indicators on food package helps consumers more accurately perceive real-time food quality information.

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Section: Food Engineering Materialssupporting

confidence: 93%

An inkjet‐printed sulfonephthalein dye indicator array for volatile amine detection

Luo

Lim

2020

Journal of Food Science

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“…When the laser beam (λ = 532 nm) was coupled into the waveguide layer by a prism (glass prism, n = 1.78; matching liquid of diiodomethane as matching liquid, n = 1.74), 25,26 light in the guided wave layer appeared in the form of the total reflection of the evanescent wave getting into the sensitive layer. 27 When analytes were injected into the flow cell and exposed to the sensitive layer, the evanescent wave intensity changed, which led to a change in the output light intensity. The intensity of the output light was monitored using a photomultiplier detector, and was recorded by a computer.…”

Section: Owg Gas Detection Systemmentioning

confidence: 99%

“…The ratio between the signal value and the noise reflects the accuracy of the test data, and the general ratio for a clear signal is S/N ≥ 3. 27,42 The SNR can be obtained using the following equation: Fig. 8 Dynamic response curve of the SDBS-WO3 thin-film/Sndoped glass OWG sensor to 1000 ppm of gas analytes.…”

Section: Response Mechanism and Selective Response Of Sensor Element mentioning

confidence: 99%

Optical-Electricity Gas-Sensing Property Detection of SDBS-WO3 Film at Room Temperature

et al. 2018

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In this work, sodium dodecyl benzene sulfonate (SDBS) was used as a dispersing agent; a WO3 nanoparticle suspension was used as a sensing material. The SDBS-WO3 thin film/Sn-doped glass optical waveguide sensor element was prepared by spin coating. The sensing material was characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and field-emission scanning electron microscopy (FESEM). The gas-sensing characteristics of the fabricated sensors were studied at room temperature for various gases. The experimental results indicate that the sensor exhibited a high selective response toward SO2 and H2S and a low detection limit of 10 ppb to SO2 and H2S. The response/recovery times for SO2 and H2S were 2/23 and 2/18 s. However, during an electrochemical gas-sensing performance test of the SDBS-WO3 film at room temperature, the results indicated that the trend of the variation in resistance was consistent with the variation in the output light.

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“…Therefore, the evanescent wave generated at the interface between the waveguide layer and the sensitive film by the laser, which transmitted in the waveguide layer at total reflection mode can be used as a probe to detect the analyte (Scheme 1). OWG sensors own the advantages of high sensitivity, fast response time, and system compactness, and they have witnessed widespread application in the detecting cell [19,20,21], biological molecules [22,23], and metal ions [24], as well as in the detection of low-concentration gas (such as xylene [25,26], chlorobenzene [27], ammonia [28], trimethylamine [29], and hydrogen chloride [30]). Inspired by these advantages, we developed an OWG sensor that is low-cost and has both a real-time and sensitive detection DCP vapor.…”

Section: Introductionmentioning

confidence: 99%

A Potassium Ion-Exchanged Glass Optical Waveguide Sensor Locally Coated with a Crystal Violet-SiO2 Gel Film for Real-Time Detection of Organophosphorus Pesticides Simulant

Du¹,

Tong²,

Mu³

et al. 2019

Sensors

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An optical waveguide (OWG) sensor was developed for real-time detection of diethyl chlorophosphate (DCP) vapor, which is a typical simulant for organophosphorus pesticides and chemical weapon agents. Silica gel, crystal violet (CV), and potassium ion-exchange (PIE) OWG were used to fabricate the sensor’s device. In the real-time detection of the DCP vapor, the volume fraction of DCP vapor was recorded to be as low as 1.68 × 10−9. Moreover, the detection mechanism of CV-SiO2 gel film coated the PIE OWG sensor for DCP, which was evaluated by absorption spectra. These results demonstrated that the change of output light intensity of the OWG sensor significantly increased with the augment of the DCP concentration. Repeatability as well as selectivity of the sensors were tested using 0.042 × 10−6 and 26.32 × 10−6 volume fraction of the DCP vapor. No clear interference with the DCP detection was observed in the presence of other common solvents (e.g., acetone, methanol, dichloromethane, dimethylsulfoxide, and tetrahydrofuran), benzene series (e.g., benzene, toluene, chlorobenzene, and aniline), phosphorus-containing reagents (e.g., dimethyl methylphosphonate and trimethyl phosphate), acid, and basic gas (e.g., acetic acid and 25% ammonium hydroxide), which demonstrates that the OWG sensor could provide real-time, fast, and accurate measurement results for the detection of DCP.

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The fabrication and gas sensing application of a fast-responding m-CP-PVP composite film/potassium ion-exchanged glass optical waveguide

Abstract: A simply designed sensor was able to measure trimethylamine (TMA) gas down to a concentration of 0.1 ppb at room temperature, and its response and recovery times were 1.4 s and 5.6 s, respectively.

Cited by 20 publications

References 39 publications

An inkjet‐printed sulfonephthalein dye indicator array for volatile amine detection

An inkjet‐printed sulfonephthalein dye indicator array for volatile amine detection

Optical-Electricity Gas-Sensing Property Detection of SDBS-WO3 Film at Room Temperature

A Potassium Ion-Exchanged Glass Optical Waveguide Sensor Locally Coated with a Crystal Violet-SiO2 Gel Film for Real-Time Detection of Organophosphorus Pesticides Simulant

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