Film bulk acoustic formaldehyde sensor with polyethyleneimine-modified single-wall carbon nanotubes as sensitive layer

Song, Shuren; Chen, Da; Wang, Hongfei; Guo, Qiuquan; Wang, Wei; Wu, Maozeng; Yu, Wenhua

doi:10.1016/j.snb.2018.03.129

Cited by 30 publications

(21 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…Zhao et al [191] reported a 1.5 GHz protein functionalized FBAR sensor for detecting a common insect repellent i.e., N,N-diethyl- meta -toluamide indicating the use of FBARs as odorant sensors. Song et al [109] integrated polyethyleneimine modified SWCNTs with gold electrode surface via self-assembling for chemical sensing of formaldehyde vapors. The resonance frequency of FBAR device was about 4.5 GHz which resulted in an exceptionally low detection limit of 24 ppb and sensitivity of 1.472 kHz/ppb for formaldehyde.…”

Section: Exemplary Sensor Applicationsmentioning

confidence: 99%

“…( A ) Schematic design of a typical film bulk acoustic wave resonator (FBAR), ( B ) Schematic diagram of solidly mounted resonator (SMR), adapted with permission from [90]. ( C ) ( a ) Image of packaged FBAR sensor designed for sensing of formaldehyde, ( b ) FBAR device integrated with PCB, ( c ) magnified image of sensor element, adapted with permission from [109]. …”

Section: Figurementioning

confidence: 99%

“…Sensor response of FBAR device coated with polyethyleneimine-modified single walled carbon nanotubes for formaldehyde vapors at 50 ppb, 200 ppb and 400 ppb, measured at 23 °C and 40% relative humidity. Sensor shifts to different interferents such as ethanol, acetone, benzene, toluene, chloroform and dichloromethane were also recorded at concentrations twice high as of formaldehyde, adapted with permission from [109]. …”

Section: Figurementioning

confidence: 99%

See 1 more Smart Citation

An Overview of High Frequency Acoustic Sensors—QCMs, SAWs and FBARs—Chemical and Biochemical Applications

Mujahid

Afzal

Dickert

2019

Sensors

View full text Add to dashboard Cite

Acoustic devices have found wide applications in chemical and biosensing fields owing to their high sensitivity, ruggedness, miniaturized design and integration ability with on-field electronic systems. One of the potential advantages of using these devices are their label-free detection mechanism since mass is the fundamental property of any target analyte which is monitored by these devices. Herein, we provide a concise overview of high frequency acoustic transducers such as quartz crystal microbalance (QCM), surface acoustic wave (SAW) and film bulk acoustic resonators (FBARs) to compare their working principles, resonance frequencies, selection of piezoelectric materials for their fabrication, temperature-frequency dependency and operation in the liquid phase. The selected sensor applications of these high frequency acoustic transducers are discussed primarily focusing on the two main sensing domains, i.e., biosensing for working in liquids and gas/vapor phase sensing. Furthermore, the sensor performance of high frequency acoustic transducers in selected cases is compared with well-established analytical tools such as liquid chromatography mass spectrometry (LC-MS), gas chromatographic (GC) analysis and enzyme-linked immunosorbent assay (ELISA) methods. Finally, a general comparison of these acoustic devices is conducted to discuss their strengths, limitations, and commercial adaptability thus, to select the most suitable transducer for a particular chemical/biochemical sensing domain.

show abstract

“…Most FBAR has a similar structure to that of QCM and its working mechanism is also based on the same principle. Usually, the piezoelectric thin films are deposited with normal-plane c -axis crystal orientation and sandwiched between two electrodes, which makes FBAR operate in thickness longitudinal mode (TLM) [ 21 , 22 , 23 ]. However, when these devices work in viscous liquids such as blood, tissue fluids and biocolloids, the longitudinal wave is radiated into the liquid through compressional motion, resulting in a serious damping [ 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Shear Mode Bulk Acoustic Resonator Based on Inclined c-Axis AlN Film for Monitoring of Human Hemostatic Parameters

et al. 2018

Self Cite

View full text Add to dashboard Cite

Measurement of hemostatic parameters is essential for patients receiving long-term oral anticoagulant agents. In this paper, we present a shear mode bulk acoustic resonator based on an inclined c-axis aluminum nitride (AlN) film for monitoring the human hemostatic parameters. During the blood coagulation process, the resonant frequency of the device decreases along with a step-ladder profile due to the viscosity change during the formation of fibers in blood, revealing the sequential coagulation stages. Two hemostatic parameters with clinical significance, prothrombin time (PT) along with its derived measure of international normalized ratio (INR), are determined from time-frequency curves of the device. Furthermore, the resonator is compared with a commercial coagulometer by monitoring the hemostatic parameters for one month in a patient taking the oral anticoagulant. The results are consistent. In addition, thanks to the excellent potential for integration, miniaturization and the availability of direct digital signals, the proposed device has promising application for point of care coagulation monitoring.

show abstract

Film bulk acoustic formaldehyde sensor with polyethyleneimine-modified single-wall carbon nanotubes as sensitive layer

Cited by 30 publications

References 39 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

An Overview of High Frequency Acoustic Sensors—QCMs, SAWs and FBARs—Chemical and Biochemical Applications

Shear Mode Bulk Acoustic Resonator Based on Inclined c-Axis AlN Film for Monitoring of Human Hemostatic Parameters

Contact Info

Product

Resources

About