A high performance surface acoustic wave visible light sensor using novel materials: Bi<sub>2</sub>S<sub>3</sub> nanobelts

Li, Chong; Kan, Hao; Luo, Jingting; Fu, Chen; Zhou, Jian; Liu, Xueli; Wang, Wen; Wei, Qiuping; Fu, Yongqing

doi:10.1039/c9ra08848b

Cited by 16 publications

(4 citation statements)

References 32 publications

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“…SAW sensors have been widely utilized recently in light sensing as well. The sensing area of the SAW devices is coated with a photosensitive chemical that changes its properties upon light exposure, resulting in the mass loading effect, which changes the acoustic velocity and subsequently affects the frequency shift utilized for sensing purposes [ 78 , 79 , 80 ]. In a very similar manner, SAW devices are also widely being used as pH sensors [ 81 , 82 ].…”

Section: Introductionmentioning

confidence: 99%

Surface Acoustic Wave (SAW) Sensors: Physics, Materials, and Applications

Mandal

Banerjee

2022

Sensors

211

100

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Surface acoustic waves (SAWs) are the guided waves that propagate along the top surface of a material with wave vectors orthogonal to the normal direction to the surface. Based on these waves, SAW sensors are conceptualized by employing piezoelectric crystals where the guided elastodynamic waves are generated through an electromechanical coupling. Electromechanical coupling in both active and passive modes is achieved by integrating interdigitated electrode transducers (IDT) with the piezoelectric crystals. Innovative meta-designs of the periodic IDTs define the functionality and application of SAW sensors. This review article presents the physics of guided surface acoustic waves and the piezoelectric materials used for designing SAW sensors. Then, how the piezoelectric materials and cuts could alter the functionality of the sensors is explained. The article summarizes a few key configurations of the electrodes and respective guidelines for generating different guided wave patterns such that new applications can be foreseen. Finally, the article explores the applications of SAW sensors and their progress in the fields of biomedical, microfluidics, chemical, and mechano-biological applications along with their crucial roles and potential plans for improvements in the long-term future in the field of science and technology.

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Section: Introductionmentioning

confidence: 99%

Surface Acoustic Wave (SAW) Sensors: Physics, Materials, and Applications

Mandal

Banerjee

2022

Sensors

211

100

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“…On the other hand, low-dimensional nanomaterials are widely investigated in gas sensing due to their large specific surface areas, including PbS quantum dots, ZnO nanowires, Bi 2 S 3 nanobelts, graphene, SnO 2 nanospheres, etc. Among them, Bi 2 S 3 , as a direct-band-gap (1.3–1.7 eV) semiconductor, is thermochemically stable at room temperature, with a wide range of applications in optoelectronic devices, photodetectors, and sensors . Moreover, Bi 2 S 3 possesses an advantage over many other low-dimensional nanomaterials due to its low-cost and nontoxic constituent elements (Bi and S), eliminating the need for expensive or potentially harmful elements.…”

Section: Introductionmentioning

confidence: 99%

Ti₃C₂T_x Nanosheet/Bi₂S₃ Nanobelt Composites for NO₂ Gas Sensing

Li,

Tao,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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Along with the revolution of the Internet of Things (IoT), smart, flexible, easily fabricated, and highly sensitive gas sensors are essential for many portable electronics. In this study, a wearable NO 2 sensor based on a nanomesh structure woven with Ti 3 C 2 T x microflakes and Bi 2 S 3 nanobelts operated at room temperature was successfully designed and prepared. The effects of the mass ratio between two materials on the performance were evaluated. Bi 2 S 3 nanobelts embedded inside accordion-like Ti 3 C 2 T x provide large specific surface areas and abundant active sites for the adsorption of NO 2 molecules. Attributed to the high conductivity of Ti 3 C 2 T x , the carriers generated in the sensitive layers are easily transmitted during sensing, thus significantly reducing the response and recovery times. The sensor based on the nanomesh containing 30 wt % Ti 3 C 2 T x exhibits excellent sensing performance, fast response/recovery rates, and high stability even in arbitrary deformed shape conditions. Upon exposure to 1 ppm NO 2 , the response of the sensor is 12.67, and the response/recovery times are 5/28 s, respectively. A stable sensing performance can be maintained after 1500 cycles of deformation. This work demonstrates a simple but reliable manufacturing strategy of wearable gas sensors for the next generation of IoT monitoring network-linking human activities.

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“…By the operation of the SAW sensor system, changes on the surface of the substrate on the molecular level by the interaction with the analytes can be detected as frequency and attenuation changes through ultrasonic measurements. The resulting mass loading effect, which changes the acoustic velocity and, subsequently, affects the frequency shift, is utilized for sensing purposes [8,9]. The surface of the SAW sensor element should, therefore, be sensitized by the deposition of a suitable coating layer to create, ideally, the appropriate chemical environment for the interaction with the target analytes.…”

Section: Introductionmentioning

confidence: 99%

The Use of Polyurethane Composites with Sensing Polymers as New Coating Materials for Surface Acoustic Wave-Based Chemical Sensors—Part II: Polyurethane Composites with Polylaurylmetacrylate, Polyisobutene, and Poly(chlorotrifluoroethylene-co-vinylidene Fluoride): Coating Results, Relative Sensor Responses and Adhesion Analysis

Carvalho,

Rapp,

Voigt

et al. 2024

Coatings

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This work presents the application of the methodology for the sensitization of surface acoustic wave-based sensors (SAW), developed in the first part of this work. The strategy of the method is the obtention of sensing layers with tailored chemical environments by taking advantage of the wide variety of chemical composition of the organic polymers, which have been used as sensing polymers, and combining them with polyurethane (PU) to form polymeric composites that show enhanced properties as sensing materials for the SAW sensor technology. In the first part of this work, the ultrasonic and adhesion characterization was correlated to the sensor responses of PU-polybutylmethacrylate (PBMA) composites of different relative concentrations of the sensing polymer (PBMA) and PU. The resulting coating layers obtained with the PU polymer composites improved the chemical and mechanical properties of the sensing layer without interfering with the quality of their sensor responses in comparison to those with the pristine polymer as the sensing material. In this second part of this work, three new polyurethane polymeric composites were analyzed. The new sensing materials were produced using polylaurylmetacrylate (PLMA), polyisobutene (PIB), and poly(chlorotrifluoroethylene-co-vinylidene fluoride) (PCTFE) as the sensing polymers combined with PU. The results of the new PU polymer composites showed consequently different properties depending on the type of sensing polymer used, reproducing, however, the previous features achieved with PU and polybutylmetacrylate (PBMA) composites, like the improvements in the adhesion and the resistance against an organic solvent and preserving, in each case, the sensor response characteristic of each sensing polymer used, as was also observed for the PU-PBMA polymeric composites. The results obtained with the new sensing materials validated the strategy and confirmed its generalization as a very suitable methodology for the sensitization of SAW sensors, strongly indicating the applicability and reliability of the method, which makes possible the choice of virtually any chemical environments for the sensitization of SAW sensor systems.

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A high performance surface acoustic wave visible light sensor using novel materials: Bi₂S₃ nanobelts

Abstract: A high performance surface acoustic wave visible light sensor with Bi2S3 nanobelts.

Cited by 16 publications

References 32 publications

Surface Acoustic Wave (SAW) Sensors: Physics, Materials, and Applications

Surface Acoustic Wave (SAW) Sensors: Physics, Materials, and Applications

Ti₃C₂T_x Nanosheet/Bi₂S₃ Nanobelt Composites for NO₂ Gas Sensing

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A high performance surface acoustic wave visible light sensor using novel materials: Bi2S3 nanobelts

Abstract: A high performance surface acoustic wave visible light sensor with Bi2S3 nanobelts.

Cited by 16 publications

References 32 publications

Surface Acoustic Wave (SAW) Sensors: Physics, Materials, and Applications

Surface Acoustic Wave (SAW) Sensors: Physics, Materials, and Applications

Ti3C2Tx Nanosheet/Bi2S3 Nanobelt Composites for NO2 Gas Sensing

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Product

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A high performance surface acoustic wave visible light sensor using novel materials: Bi₂S₃ nanobelts

Ti₃C₂T_x Nanosheet/Bi₂S₃ Nanobelt Composites for NO₂ Gas Sensing