Highly sensitive and wearable capacitive pressure sensors based on PVDF/BaTiO3 composite fibers on PDMS microcylindrical structures

Yang, Chii Rong; Lin, Ming-Chyuan; Huang, Chun‐Kai; Huang, Wei-Chia; Tseng, Shih‐Feng; Chiang, Hsin‐Han

doi:10.1016/j.measurement.2022.111817

Cited by 32 publications

(16 citation statements)

References 50 publications

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“…These results demonstrate the superiority of the VG electrodes and micro-pyramidal dielectrics. In addition, when compared with the results in the literature, the pyramid structure of the dielectric layer is superior to other geometries, as shown in Table S5 [ 43 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ].…”

Section: Resultsmentioning

confidence: 81%

“…The following supporting information can be downloaded at: , Figure S1: Height distribution ratios of the VG1, VG2, and VG3 films analyzed using Image J software; Figure S2: Sheet resistance of the VG1, VG2, and VG3 films; Figure S3: Step response of the VG1-F sensor at the pressure of 0–1 kPa; Figure S4: Illustration of the size and interval of the micro-pyramids in the PDMS dielectric layer; Figure S5: Relative capacitance changes of the VG1-based capacitive pressure sensors with different micro-pyramid sizes and intervals at a pressure range of 0–10 kPa; Table S1: Growth conditions of the VG films with different morphologies; Table S2: Comparison of the sensitivities of the VG1-F, VG2-F, and VG3-F sensors; Table S3: Comparison of the sensitivities of the VG-based sensors with different micro-pyramid sizes and intervals; Table S4: Comparison of the sensitivities of the VG-based sensors and graphite paper-based sensors with/without micro-pyramidal PDMS dielectric layer; Table S5: Comparison of the performances of the pyramid structured interfaces with other reported geometries. References [ 43 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ] are cited in the supplementary materials. Table S6: Comparison of the performances of the VG based sensor with other pressure sensors in the literature.…”

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confidence: 99%

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Highly Sensitive and Flexible Capacitive Pressure Sensors Based on Vertical Graphene and Micro-Pyramidal Dielectric Layer

Zhao

Han

et al. 2023

Nanomaterials

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Many practical applications require flexible high-sensitivity pressure sensors. However, such sensors are difficult to achieve using conventional materials. Engineering the morphology of the electrodes and the topography of the dielectrics has been demonstrated to be effective in boosting the sensing performance of capacitive pressure sensors. In this study, a flexible capacitive pressure sensor with high sensitivity was fabricated by using three-dimensional vertical graphene (VG) as the electrode and micro-pyramidal polydimethylsiloxane (PDMS) as the dielectric layer. The engineering of the VG morphology, size, and interval of the micro-pyramids in the PDMS dielectric layer significantly boosted the sensor sensitivity. As a result, the sensors demonstrated an exceptional sensitivity of up to 6.04 kPa−1 in the pressure range of 0–1 kPa, and 0.69 kPa−1 under 1–10 kPa. Finite element analysis revealed that the micro-pyramid structure in the dielectric layer generated a significant deformation effect under pressure, thereby ameliorating the sensing properties. Finally, the sensor was used to monitor finger joint movement, knee motion, facial expression, and pressure distribution. The results indicate that the sensor exhibits great potential in various applications, including human motion detection and human-machine interaction.

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Section: Resultsmentioning

confidence: 81%

mentioning

confidence: 99%

Highly Sensitive and Flexible Capacitive Pressure Sensors Based on Vertical Graphene and Micro-Pyramidal Dielectric Layer

Zhao

Han

et al. 2023

Nanomaterials

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“…These modifications are beneficial for enhancing detection sensitivity, expanding sensing ranges, and increasing the output power of self-powered sensors. 169,170 Yang et al 171 recently exploited a novel and highly sensitive flexible capacitive sensor (Figure 8C). This constructed sensor employs BaTiO 3 -doped electrospun PVDF nanofibers and PDMS with microcylindrical structures as the dielectric layers.…”

Section: Optimization Strategies Of Electrospun Flexible Biomechanica...mentioning

confidence: 99%

Section: Optimization Strategies Of Electrospun Flexible Biomechanica...mentioning

confidence: 99%

Electrospun Micro/Nanofiber-Based Biomechanical Sensors

Li,

Zhang,

et al. 2023

ACS Appl. Polym. Mater.

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Electrospun micro/nanofibers have gained popularity recently for flexible biomechanical sensors because of their advantages of lightness, compatibility, breathability, mechanical deformability, and function integrability, etc., offering them unprecedented sensitivities and versatilities. With increasing advances in the digital era, existing electrospun flexible sensors are not capable of catering to the demands of multiscenario applications including wearable electronics, interactive interfaces, and real-time continuous health monitoring. To ease and expedite their developments, we thoroughly reviewed their latest progress regarding design, preparation, and optimization. First, a brief overview of the design approaches of electrospun flexible biomechanical sensors based on the working mechanism is highlighted. Then, two kinds of preparation strategies including direct electrospinning and post-treatment-assisted electrospinning are discussed in detail. Further, four means for optimizing the performance and endowing multifunctions to electrospun flexible biomechanical sensors are demonstrated in terms of processing. Accordingly, the challenges and the potential solutions related to this topic are addressed, providing a future direction for the next generation of electrospun flexible biomechanical sensors.

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“…Meanwhile, the desired fiber structure and morphology can be obtained by coordinating the electrospinning solution properties and process parameters. Researchers have continuously used electrospinning technology to develop special nanofibrous structures such as asymmetric Janus, hollow, porous, and core–shell structures. − Through the optimization of polymers and structural control, the electrospinning technology has been widely used in many fields, such as air or water filtration, − biomedical treatment, − energy storage materials, − and sensors. − Various types of functional nanoparticles can be effectively loaded into nanofibers to greatly enrich the construction materials of the sensing interface in sensors. Moreover, an electrospun nanofiber membrane has the characteristics of large specific surface area, high porosity, and rich contact points, which give it higher loading capacity and smaller sample volume than traditional materials and provide the possibility to prepare sensors with higher sensitivity and faster response time. − Applying electrospinning technology to the field of physical sensor research can not only demonstrate the superior performance of electrospun nanofiber materials but also open up broader prospects for the development of physical sensors.…”

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confidence: 99%

Recent Advances in Physical Sensors Based on Electrospinning Technology

Cao

Chai

Tan

et al. 2023

ACS Materials Lett.

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In the past decades, the rapid development of the Internet of Things (IoT) technology and artificial intelligence (AI) has driven the research boom of physical sensors. Material selection, structure design, and performance research for physical sensors have attracted extensive attention from worldwide researchers in the field of advanced manufacturing. Significant technological progress has been made in the area of physical sensors for applications in various fields such as electronic skin, biomedicine, and tissue engineering. There are many methods (e.g., electrospinning, screen printing, or rotary coating) to prepare physical sensors. Among them, nanofibers or nanofiber membranes prepared by electrospinning have the advantages of a nanosize effect, high specific surface area, and high porosity over other reported materials used for physical sensors. In this review, the working principles of various physical sensors including pressure sensors, strain sensors, temperature sensors, and humidity sensors are first introduced; recent research progress of electrospun nanofiber-based physical sensors is then summarized. Finally, future research trends and associated challenges of large-scale adoption of electrospun physical sensors are proposed.

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Highly sensitive and wearable capacitive pressure sensors based on PVDF/BaTiO3 composite fibers on PDMS microcylindrical structures

Cited by 32 publications

References 50 publications

Highly Sensitive and Flexible Capacitive Pressure Sensors Based on Vertical Graphene and Micro-Pyramidal Dielectric Layer

Highly Sensitive and Flexible Capacitive Pressure Sensors Based on Vertical Graphene and Micro-Pyramidal Dielectric Layer

Electrospun Micro/Nanofiber-Based Biomechanical Sensors

Recent Advances in Physical Sensors Based on Electrospinning Technology

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