ZnO piezoelectric film resonator modified with multi-walled carbon nanotubes/polyethyleneimine bilayer for the detection of trace formaldehyde

Ma, Jilong; Wang, Shaotian; Chen, Da; Wang, Wei; Zhang, Zhen; Song, Shuren; Yu, Wenhua

doi:10.1007/s00339-017-1481-5

Cited by 12 publications

(7 citation statements)

References 41 publications

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“…Polyethylenimine (PEI) is a typical water-soluble polyamine, with a polar group (amino group) and a hydrophobic (vinyl) structure that allow it to be bound to different substances [28,29]. It has a wide range of applications in polymer dyes [30], papermaking [31], fiber modification [32] and biomedicine [33].…”

Section: Introductionmentioning

confidence: 99%

Integrated sensing layer of bacterial cellulose and polyethyleneimine to achieve high sensitivity of ST-cut quartz surface acoustic wave formaldehyde gas sensor

Wang

Guo

Long

et al. 2020

Journal of Hazardous Materials

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Surface acoustic wave (SAW)-based formaldehyde gas sensor using bi-layer nanofilms of bacterial cellulose (BC) and polyethyleneimine (PEI) was developed on an ST-cut quartz substrate using sol-gel and spin coating processes. BC nanofilms significantly improve the sensitivity of PEI films to formaldehyde gas, and reduces response and recovery times. The BC films have superfine filamentary and fibrous network structures, which provide a large number of attachment sites for the PEI particles. Measurement results obtained using in situ diffuse reflectance Fourier transform infrared spectroscopy showed that the primary amino groups of PEI strongly adsorb formaldehyde molecules through nucleophilic reactions, thus resulting in a negative frequency shift of the SAW sensor due to the mass loading effect. In addition, experimental results showed that the frequency shifts of the SAW devices are determined by thickness of PEI film, concentration of formaldehyde and relative humidity. The PEI/BC sensor coated with three layers of PEI as the sensing layer showed the optimal sensing performance, which had a frequency shift of 35.6 kHz for 10 ppm formaldehyde gas, measured at room temperature and 30% RH. The sensor also showed good selectivity and stability, with a low limit of detection down to 100 ppb.

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Section: Introductionmentioning

confidence: 99%

Integrated sensing layer of bacterial cellulose and polyethyleneimine to achieve high sensitivity of ST-cut quartz surface acoustic wave formaldehyde gas sensor

Wang

Guo

Long

et al. 2020

Journal of Hazardous Materials

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“…In fact, microfluidic colorimetric sensor, chemical/electrochemical sensor, mass sensor and piezoelectric sensor have already been developed for the HCHO detection. − Among them, metal oxide semiconductor (MOS) gas sensors have been used extensively to measure and monitor trace amounts of HCHO in environments. − HCHO sensitive materials such as hierarchical materials (ZnO, In 2 O 3 and Co 3 O 4 , and SnO 2 ), core–shell nanofibers (SnO 2 @In 2 O 3 and α-Fe 2 O 3 @NiO), heterostructure materials (SnO 2 /ZnO and Zn 2 SnO 4 /SnO 2 ), and hierarchical heterostructure (CuO-TiO 2 and WO 3 /In 2 O 3 ) were prepared by various methods which included liquid phase synthesis, electrospinning, hydrothermal/solvothermal, and so on. − Although many achievements had been obtained, there are still some problems to be solved for practical applications in gas sensors, like the detection of HCHO in ppb level, and the detection in complex environments.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical In₂O₃@SnO₂ Core–Shell Nanofiber for High Efficiency Formaldehyde Detection

Wan

Wang

et al. 2019

ACS Appl. Mater. Interfaces

175

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In this work, three-dimensional (3D) hierarchical In2O3@SnO2 core–shell nanofiber (In2O3@SnO2) was designed and successfully prepared via a facile electrospinning and further hydrothermal methods. Vertically aligned SnO2 nanosheets uniformly grown on the outside surface of In2O3 nanofibers were clearly observed by field emission scanning electron microscopy. Besides, hierarchical core–shell nanostructure of In2O3@SnO2 was characterized by elemental maps using scanning transmission electron microscopy. The formaldehyde (HCHO) sensing performances of pure In2O3 nanofibers, SnO2 nanosheets, and In2O3@SnO2 core–shell nanocomposite were compared, and the In2O3@SnO2 nanocomposite possessed highest response value, fast response/recovery speed, best selectivity, and lowest HCHO detection limit. Specifically, the response value (R a/R g) of the In2O3@SnO2 nanocomposite reached 180.1 toward 100 ppm of HCHO gas, which was near 9 and 6 times higher than that of the pure In2O3 nanofibers (R a/R g = 19.7) and pure SnO2 nanosheets (R a/R g = 33.2), respectively. In addition, the gas sensor showed instantaneous response/recovery time (3/3.6 s) toward 100 ppm of HCHO at the optimal operation temperature of 120 °C. More importantly, the detection limit toward HCHO gas was as low as 10 ppb (R a/R g = 1.9), which could be used for trace HCHO gas detection. The excellent sensing properties of the In2O3@SnO2 were attributed to the synergistic effect of large specific surface areas of SnO2 nanosheet arrays, abundant adsorbed oxygen species on the surface, unique electron transformation between core–shell heterogeneous materials, and long electronic transmission channel of SnO2 transition layer. This work provides an efficient route for the preparation of novel hierarchical sensitive materials.

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“…Furthermore, Jilong Ma et al [ 301 ] developed another type of FBAR using a ZnO piezoelectric thin film layer instead of AIN. The prepared FBAR sensors have been used for formaldehyde gas detection.…”

Section: Piezoelectric Mems Actuating and Sensing For Gas Detectionmentioning

confidence: 99%

A review of piezoelectric MEMS sensors and actuators for gas detection application

et al. 2023

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Piezoelectric microelectromechanical system (piezo-MEMS)-based mass sensors including the piezoelectric microcantilevers, surface acoustic waves (SAW), quartz crystal microbalance (QCM), piezoelectric micromachined ultrasonic transducer (PMUT), and film bulk acoustic wave resonators (FBAR) are highlighted as suitable candidates for highly sensitive gas detection application. This paper presents the piezo-MEMS gas sensors’ characteristics such as their miniaturized structure, the capability of integration with readout circuit, and fabrication feasibility using multiuser technologies. The development of the piezoelectric MEMS gas sensors is investigated for the application of low-level concentration gas molecules detection. In this work, the various types of gas sensors based on piezoelectricity are investigated extensively including their operating principle, besides their material parameters as well as the critical design parameters, the device structures, and their sensing materials including the polymers, carbon, metal–organic framework, and graphene.

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ZnO piezoelectric film resonator modified with multi-walled carbon nanotubes/polyethyleneimine bilayer for the detection of trace formaldehyde

Cited by 12 publications

References 41 publications

Integrated sensing layer of bacterial cellulose and polyethyleneimine to achieve high sensitivity of ST-cut quartz surface acoustic wave formaldehyde gas sensor

Integrated sensing layer of bacterial cellulose and polyethyleneimine to achieve high sensitivity of ST-cut quartz surface acoustic wave formaldehyde gas sensor

Hierarchical In₂O₃@SnO₂ Core–Shell Nanofiber for High Efficiency Formaldehyde Detection

A review of piezoelectric MEMS sensors and actuators for gas detection application

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ZnO piezoelectric film resonator modified with multi-walled carbon nanotubes/polyethyleneimine bilayer for the detection of trace formaldehyde

Cited by 12 publications

References 41 publications

Integrated sensing layer of bacterial cellulose and polyethyleneimine to achieve high sensitivity of ST-cut quartz surface acoustic wave formaldehyde gas sensor

Integrated sensing layer of bacterial cellulose and polyethyleneimine to achieve high sensitivity of ST-cut quartz surface acoustic wave formaldehyde gas sensor

Hierarchical In2O3@SnO2 Core–Shell Nanofiber for High Efficiency Formaldehyde Detection

A review of piezoelectric MEMS sensors and actuators for gas detection application

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Product

Resources

About

Hierarchical In₂O₃@SnO₂ Core–Shell Nanofiber for High Efficiency Formaldehyde Detection