The Experts below are selected from a list of 5751 Experts worldwide ranked by ideXlab platform
Yihua Gao - One of the best experts on this subject based on the ideXlab platform.
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Flexible and high-sensitivity Piezoresistive Sensor based on MXene composite with wrinkle structure
Ceramics International, 2020Co-Authors: Jinfeng Yan, Shijun Luo, Meng Zhu, Chuankun Zhang, Minglei Cao, Wei Chen, Yihua GaoAbstract:Abstract Due to the portability, good flexibility and excellent sensing performance, flexible Piezoresistive Sensors have received great attention in the field of transient electronic skin, intelligent robots and human-machine interaction. However, achieving both high sensitivity and wide sensing range by low-cost and large-scale method still remains a key challenge for developing high performance Piezoresistive Sensors. Here, a flexible and highly sensitive Piezoresistive Sensor was designed and realized by combining the 2D MXene material with wrinkle structure. The MXene composite based Sensor with wrinkle structure was fabricated by spraying the active material onto the surface of a pre-stretched polyacrylate tape, which is facile, efficient and low-cost. The MXene composite based Sensor demonstrates high sensitivity (148.26 kPa−1), wide pressure range (up to 16 kPa), short response time (120 ms) and excellent durability (>13000 cycles). Moreover, benefiting from the extraordinary sensing performance and flexibility, the Sensor can detect human physiological signals, monitor intelligent robot postures and map spatial pressure distributions, thus exhibiting great potential in physiological analysis systems, humanoid robotics and biomedical prostheses.
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3d hybrid porous mxene sponge network and its application in Piezoresistive Sensor
Nano Energy, 2018Co-Authors: Yang Yue, Jiangyu Rao, Nishuang Liu, Weijie Liu, Cheng Luo, Siliang Wang, Zhi Zhang, Qing Huang, Yihua GaoAbstract:Abstract High-performance pressure Sensors attract widespread attention due to the potential applications in human-machine interaction and wearable electronics. However, most of flexible pressure Sensors need elaborate nanostructure design, and thus their manufacture is consuming and complicated. Therefore, a large-scale and low-cost technology is highly desirable to fabricate flexible pressure sensitive materials with high sensitivity in broad pressure range. Here, an MXene-sponge was fabricated by a simple and efficient dipping-coating process method and was applied in the Piezoresistive Sensor with insulating Polyvinyl Alcohol (PVA) nanowires as a spacer. The Sensor based on MXene-sponge presents high sensitivity for a broad pressure range (147 kPa−1 for less than 5.37 kPa region and 442 kPa−1 for 5.37–18.56 kPa region), a low detection limit of 9 Pa, a rapid response time of 138 ms, and an excellent durability over 10,000 cycles. Human physiological signal (such as respiration, joint movement and pulses) can be real-time monitored by the MXene-sponge Sensor. The potential applications of the Sensor in measuring pressure distribution and human-machine interaction are also explored.
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Piezoresistive pressure Sensor based on synergistical innerconnect polyvinyl alcohol nanowires wrinkled graphene film
Small, 2018Co-Authors: Weijie Liu, Yang Yue, Feng Cheng, Jiangyu Rao, Zhitian Liu, Nishuang Liu, Yihua GaoAbstract:Piezoresistive Sensor is a promising pressure Sensor due to its attractive advantages including uncomplicated signal collection, simple manufacture, economical and practical characteristics. Here, a flexible and highly sensitive pressure Sensor based on wrinkled graphene film (WGF)/innerconnected polyvinyl alcohol (PVA) nanowires/interdigital electrodes is fabricated. Due to the synergistic effect between WGF and innerconnected PVA nanowires, the as-prepared pressure Sensor realizes a high sensitivity of 28.34 kPa-1 . In addition, the device is able to discern lightweight rice about 22.4 mg (≈2.24 Pa) and shows excellent durability and reliability after 6000 repeated loading and unloading cycles. What is more, the device can detect subtle pulse beat and monitor various human movement behaviors in real-time.
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a highly flexible and sensitive Piezoresistive Sensor based on mxene with greatly changed interlayer distances
Nature Communications, 2017Co-Authors: Nishuang Liu, Shijun Luo, Zhengguang Zou, Jianbo Wang, Yihua GaoAbstract:Since the successful synthesis of the first MXenes, application developments of this new family of two-dimensional materials on energy storage, electromagnetic interference shielding, transparent conductive electrodes and field-effect transistors, and other applications have been widely reported. However, no one has found or used the basic characteristics of greatly changed interlayer distances of MXene under an external pressure for a real application. Here we report a highly flexible and sensitive Piezoresistive Sensor based on this essential characteristics. An in situ transmission electron microscopy study directly illustrates the characteristics of greatly changed interlayer distances under an external pressure, supplying the basic working mechanism for the Piezoresistive Sensor. The resultant device also shows high sensitivity (Gauge Factor ~ 180.1), fast response (<30 ms) and extraordinarily reversible compressibility. The MXene-based Piezoresistive Sensor can detect human being’s subtle bending-release activities and other weak pressure. MXenes are a family of layered materials which show promise for a variety of (opto-)electronic applications. Here, the authors leverage the variations of the interlayer distance in Ti3C2 under external pressure to devise a Piezoresistive Sensor.
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Piezoresistive Sensor with high elasticity based on 3d hybrid network of sponge cnts ag nps
ACS Applied Materials & Interfaces, 2016Co-Authors: Hui Zhang, Yang Yue, Nishuang Liu, Zhengguang Zou, Weijie Liu, Siliang Wang, Yuling Shi, Li Wen, Fei Long, Yihua GaoAbstract:Pressure Sensors with high elasticity are in great demand for the realization of intelligent sensing, but there is a need to develope a simple, inexpensive, and scalable method for the manufacture of the Sensors. Here, we reported an efficient, simple, facile, and repeatable “dipping and coating” process to manufacture a Piezoresistive Sensor with high elasticity, based on homogeneous 3D hybrid network of carbon nanotubes@silver nanoparticles (CNTs@Ag NPs) anchored on a skeleton sponge. Highly elastic, sensitive, and wearable Sensors are obtained using the porous structure of sponge and the synergy effect of CNTs/Ag NPs. Our Sensor was also tested for over 2000 compression–release cycles, exhibiting excellent elasticity and cycling stability. Sensors with high performance and a simple fabrication process are promising devices for commercial production in various electronic devices, for example, sport performance monitoring and man–machine interfaces.
Nishuang Liu - One of the best experts on this subject based on the ideXlab platform.
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3d hybrid porous mxene sponge network and its application in Piezoresistive Sensor
Nano Energy, 2018Co-Authors: Yang Yue, Jiangyu Rao, Nishuang Liu, Weijie Liu, Cheng Luo, Siliang Wang, Zhi Zhang, Qing Huang, Yihua GaoAbstract:Abstract High-performance pressure Sensors attract widespread attention due to the potential applications in human-machine interaction and wearable electronics. However, most of flexible pressure Sensors need elaborate nanostructure design, and thus their manufacture is consuming and complicated. Therefore, a large-scale and low-cost technology is highly desirable to fabricate flexible pressure sensitive materials with high sensitivity in broad pressure range. Here, an MXene-sponge was fabricated by a simple and efficient dipping-coating process method and was applied in the Piezoresistive Sensor with insulating Polyvinyl Alcohol (PVA) nanowires as a spacer. The Sensor based on MXene-sponge presents high sensitivity for a broad pressure range (147 kPa−1 for less than 5.37 kPa region and 442 kPa−1 for 5.37–18.56 kPa region), a low detection limit of 9 Pa, a rapid response time of 138 ms, and an excellent durability over 10,000 cycles. Human physiological signal (such as respiration, joint movement and pulses) can be real-time monitored by the MXene-sponge Sensor. The potential applications of the Sensor in measuring pressure distribution and human-machine interaction are also explored.
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3d synergistical mxene reduced graphene oxide aerogel for a Piezoresistive Sensor
ACS Nano, 2018Co-Authors: Yang Yue, Hang Zhang, Feng Cheng, Wanqiu Zhao, Jiangyu Rao, Shijun Luo, Jie Wang, Xueliang Jiang, Zhitian Liu, Nishuang LiuAbstract:A Piezoresistive Sensor based on ultralight and superelastic aerogel is reported to fabricate MXene/reduced graphene oxide (MX/rGO) hybrid 3D structures and utilize their pressure-sensitive characteristics. The MX/rGO aerogel not only combines the rGO’s large specific surface area and the MXene’s (Ti3C2Tx) high conductivity but also exhibits rich porous structure, which leads to performance better than that of single-component rGO or MXene in terms of the pressure Sensor. The large nanosheets of rGO can prevent the poor oxidization of MXene by wrapping MXene inside the aerogel. More importantly, the Piezoresistive Sensor based on the MX/rGO aerogel shows extremely high sensitivity (22.56 kPa–1), fast response time (<200 ms), and good stability over 10 000 cycles. The Piezoresistive Sensor based on the MX/rGO hybrid 3D aerogel can easily capture the signal below 10 Pa, thus clearly testing the pulse of an adult at random. Based on its superior performance, it also demonstrates potential applications in mea...
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Piezoresistive pressure Sensor based on synergistical innerconnect polyvinyl alcohol nanowires wrinkled graphene film
Small, 2018Co-Authors: Weijie Liu, Yang Yue, Feng Cheng, Jiangyu Rao, Zhitian Liu, Nishuang Liu, Yihua GaoAbstract:Piezoresistive Sensor is a promising pressure Sensor due to its attractive advantages including uncomplicated signal collection, simple manufacture, economical and practical characteristics. Here, a flexible and highly sensitive pressure Sensor based on wrinkled graphene film (WGF)/innerconnected polyvinyl alcohol (PVA) nanowires/interdigital electrodes is fabricated. Due to the synergistic effect between WGF and innerconnected PVA nanowires, the as-prepared pressure Sensor realizes a high sensitivity of 28.34 kPa-1 . In addition, the device is able to discern lightweight rice about 22.4 mg (≈2.24 Pa) and shows excellent durability and reliability after 6000 repeated loading and unloading cycles. What is more, the device can detect subtle pulse beat and monitor various human movement behaviors in real-time.
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a highly flexible and sensitive Piezoresistive Sensor based on mxene with greatly changed interlayer distances
Nature Communications, 2017Co-Authors: Nishuang Liu, Shijun Luo, Zhengguang Zou, Jianbo Wang, Yihua GaoAbstract:Since the successful synthesis of the first MXenes, application developments of this new family of two-dimensional materials on energy storage, electromagnetic interference shielding, transparent conductive electrodes and field-effect transistors, and other applications have been widely reported. However, no one has found or used the basic characteristics of greatly changed interlayer distances of MXene under an external pressure for a real application. Here we report a highly flexible and sensitive Piezoresistive Sensor based on this essential characteristics. An in situ transmission electron microscopy study directly illustrates the characteristics of greatly changed interlayer distances under an external pressure, supplying the basic working mechanism for the Piezoresistive Sensor. The resultant device also shows high sensitivity (Gauge Factor ~ 180.1), fast response (<30 ms) and extraordinarily reversible compressibility. The MXene-based Piezoresistive Sensor can detect human being’s subtle bending-release activities and other weak pressure. MXenes are a family of layered materials which show promise for a variety of (opto-)electronic applications. Here, the authors leverage the variations of the interlayer distance in Ti3C2 under external pressure to devise a Piezoresistive Sensor.
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Piezoresistive Sensor with high elasticity based on 3d hybrid network of sponge cnts ag nps
ACS Applied Materials & Interfaces, 2016Co-Authors: Hui Zhang, Yang Yue, Nishuang Liu, Zhengguang Zou, Weijie Liu, Siliang Wang, Yuling Shi, Li Wen, Fei Long, Yihua GaoAbstract:Pressure Sensors with high elasticity are in great demand for the realization of intelligent sensing, but there is a need to develope a simple, inexpensive, and scalable method for the manufacture of the Sensors. Here, we reported an efficient, simple, facile, and repeatable “dipping and coating” process to manufacture a Piezoresistive Sensor with high elasticity, based on homogeneous 3D hybrid network of carbon nanotubes@silver nanoparticles (CNTs@Ag NPs) anchored on a skeleton sponge. Highly elastic, sensitive, and wearable Sensors are obtained using the porous structure of sponge and the synergy effect of CNTs/Ag NPs. Our Sensor was also tested for over 2000 compression–release cycles, exhibiting excellent elasticity and cycling stability. Sensors with high performance and a simple fabrication process are promising devices for commercial production in various electronic devices, for example, sport performance monitoring and man–machine interfaces.
Yang Yue - One of the best experts on this subject based on the ideXlab platform.
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Bioinspired Microspines for a High-Performance Spray Ti3C2Tx MXene-Based Piezoresistive Sensor
ACS Nano, 2020Co-Authors: Yongfa Cheng, Yang Yue, Meng Zhu, Weijie Liu, Longfei Wang, Shuangfeng JiaAbstract:Recently, wearable and flexible pressure Sensors have sparked tremendous research interest, and considerable applications including human activity monitoring, biomedical research, and artificial intelligence interaction are reported. However, the large-scale preparation of low-cost, high-sensitivity Piezoresistive Sensors still face huge challenges. Inspired by the specific structures and excellent metal conductivity of a family of two-dimensional (2D) transition-metal carbides and nitrides (MXene) and the high-performance sensing effect of human skin including randomly distributed microstructural receptors, we fabricate a highly sensitive MXene-based Piezoresistive Sensor with bioinspired microspinous microstructures formed by a simple abrasive paper stencil printing process. The obtained Piezoresistive Sensor shows high sensitivity (151.4 kPa-1), relatively short response time (
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3d hybrid porous mxene sponge network and its application in Piezoresistive Sensor
Nano Energy, 2018Co-Authors: Yang Yue, Jiangyu Rao, Nishuang Liu, Weijie Liu, Cheng Luo, Siliang Wang, Zhi Zhang, Qing Huang, Yihua GaoAbstract:Abstract High-performance pressure Sensors attract widespread attention due to the potential applications in human-machine interaction and wearable electronics. However, most of flexible pressure Sensors need elaborate nanostructure design, and thus their manufacture is consuming and complicated. Therefore, a large-scale and low-cost technology is highly desirable to fabricate flexible pressure sensitive materials with high sensitivity in broad pressure range. Here, an MXene-sponge was fabricated by a simple and efficient dipping-coating process method and was applied in the Piezoresistive Sensor with insulating Polyvinyl Alcohol (PVA) nanowires as a spacer. The Sensor based on MXene-sponge presents high sensitivity for a broad pressure range (147 kPa−1 for less than 5.37 kPa region and 442 kPa−1 for 5.37–18.56 kPa region), a low detection limit of 9 Pa, a rapid response time of 138 ms, and an excellent durability over 10,000 cycles. Human physiological signal (such as respiration, joint movement and pulses) can be real-time monitored by the MXene-sponge Sensor. The potential applications of the Sensor in measuring pressure distribution and human-machine interaction are also explored.
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3D Synergistical MXene/Reduced Graphene Oxide Aerogel for a Piezoresistive Sensor
ACS Nano, 2018Co-Authors: Yang Yue, Hang Zhang, Feng Cheng, Wanqiu Zhao, Jiangyu Rao, Shijun Luo, Jie Wang, Xueliang Jiang, Zhitian LiuAbstract:A Piezoresistive Sensor based on ultralight and superelastic aerogel is reported to fabricate MXene/reduced graphene oxide (MX/rGO) hybrid 3D structures and utilize their pressure-sensitive characteristics. The MX/rGO aerogel not only combines the rGO’s large specific surface area and the MXene’s (Ti3C2Tx) high conductivity but also exhibits rich porous structure, which leads to performance better than that of single-component rGO or MXene in terms of the pressure Sensor. The large nanosheets of rGO can prevent the poor oxidization of MXene by wrapping MXene inside the aerogel. More importantly, the Piezoresistive Sensor based on the MX/rGO aerogel shows extremely high sensitivity (22.56 kPa–1), fast response time (
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3d synergistical mxene reduced graphene oxide aerogel for a Piezoresistive Sensor
ACS Nano, 2018Co-Authors: Yang Yue, Hang Zhang, Feng Cheng, Wanqiu Zhao, Jiangyu Rao, Shijun Luo, Jie Wang, Xueliang Jiang, Zhitian Liu, Nishuang LiuAbstract:A Piezoresistive Sensor based on ultralight and superelastic aerogel is reported to fabricate MXene/reduced graphene oxide (MX/rGO) hybrid 3D structures and utilize their pressure-sensitive characteristics. The MX/rGO aerogel not only combines the rGO’s large specific surface area and the MXene’s (Ti3C2Tx) high conductivity but also exhibits rich porous structure, which leads to performance better than that of single-component rGO or MXene in terms of the pressure Sensor. The large nanosheets of rGO can prevent the poor oxidization of MXene by wrapping MXene inside the aerogel. More importantly, the Piezoresistive Sensor based on the MX/rGO aerogel shows extremely high sensitivity (22.56 kPa–1), fast response time (<200 ms), and good stability over 10 000 cycles. The Piezoresistive Sensor based on the MX/rGO hybrid 3D aerogel can easily capture the signal below 10 Pa, thus clearly testing the pulse of an adult at random. Based on its superior performance, it also demonstrates potential applications in mea...
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Piezoresistive pressure Sensor based on synergistical innerconnect polyvinyl alcohol nanowires wrinkled graphene film
Small, 2018Co-Authors: Weijie Liu, Yang Yue, Feng Cheng, Jiangyu Rao, Zhitian Liu, Nishuang Liu, Yihua GaoAbstract:Piezoresistive Sensor is a promising pressure Sensor due to its attractive advantages including uncomplicated signal collection, simple manufacture, economical and practical characteristics. Here, a flexible and highly sensitive pressure Sensor based on wrinkled graphene film (WGF)/innerconnected polyvinyl alcohol (PVA) nanowires/interdigital electrodes is fabricated. Due to the synergistic effect between WGF and innerconnected PVA nanowires, the as-prepared pressure Sensor realizes a high sensitivity of 28.34 kPa-1 . In addition, the device is able to discern lightweight rice about 22.4 mg (≈2.24 Pa) and shows excellent durability and reliability after 6000 repeated loading and unloading cycles. What is more, the device can detect subtle pulse beat and monitor various human movement behaviors in real-time.
Jiangyu Rao - One of the best experts on this subject based on the ideXlab platform.
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3d hybrid porous mxene sponge network and its application in Piezoresistive Sensor
Nano Energy, 2018Co-Authors: Yang Yue, Jiangyu Rao, Nishuang Liu, Weijie Liu, Cheng Luo, Siliang Wang, Zhi Zhang, Qing Huang, Yihua GaoAbstract:Abstract High-performance pressure Sensors attract widespread attention due to the potential applications in human-machine interaction and wearable electronics. However, most of flexible pressure Sensors need elaborate nanostructure design, and thus their manufacture is consuming and complicated. Therefore, a large-scale and low-cost technology is highly desirable to fabricate flexible pressure sensitive materials with high sensitivity in broad pressure range. Here, an MXene-sponge was fabricated by a simple and efficient dipping-coating process method and was applied in the Piezoresistive Sensor with insulating Polyvinyl Alcohol (PVA) nanowires as a spacer. The Sensor based on MXene-sponge presents high sensitivity for a broad pressure range (147 kPa−1 for less than 5.37 kPa region and 442 kPa−1 for 5.37–18.56 kPa region), a low detection limit of 9 Pa, a rapid response time of 138 ms, and an excellent durability over 10,000 cycles. Human physiological signal (such as respiration, joint movement and pulses) can be real-time monitored by the MXene-sponge Sensor. The potential applications of the Sensor in measuring pressure distribution and human-machine interaction are also explored.
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3D Synergistical MXene/Reduced Graphene Oxide Aerogel for a Piezoresistive Sensor
ACS Nano, 2018Co-Authors: Yang Yue, Hang Zhang, Feng Cheng, Wanqiu Zhao, Jiangyu Rao, Shijun Luo, Jie Wang, Xueliang Jiang, Zhitian LiuAbstract:A Piezoresistive Sensor based on ultralight and superelastic aerogel is reported to fabricate MXene/reduced graphene oxide (MX/rGO) hybrid 3D structures and utilize their pressure-sensitive characteristics. The MX/rGO aerogel not only combines the rGO’s large specific surface area and the MXene’s (Ti3C2Tx) high conductivity but also exhibits rich porous structure, which leads to performance better than that of single-component rGO or MXene in terms of the pressure Sensor. The large nanosheets of rGO can prevent the poor oxidization of MXene by wrapping MXene inside the aerogel. More importantly, the Piezoresistive Sensor based on the MX/rGO aerogel shows extremely high sensitivity (22.56 kPa–1), fast response time (
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3d synergistical mxene reduced graphene oxide aerogel for a Piezoresistive Sensor
ACS Nano, 2018Co-Authors: Yang Yue, Hang Zhang, Feng Cheng, Wanqiu Zhao, Jiangyu Rao, Shijun Luo, Jie Wang, Xueliang Jiang, Zhitian Liu, Nishuang LiuAbstract:A Piezoresistive Sensor based on ultralight and superelastic aerogel is reported to fabricate MXene/reduced graphene oxide (MX/rGO) hybrid 3D structures and utilize their pressure-sensitive characteristics. The MX/rGO aerogel not only combines the rGO’s large specific surface area and the MXene’s (Ti3C2Tx) high conductivity but also exhibits rich porous structure, which leads to performance better than that of single-component rGO or MXene in terms of the pressure Sensor. The large nanosheets of rGO can prevent the poor oxidization of MXene by wrapping MXene inside the aerogel. More importantly, the Piezoresistive Sensor based on the MX/rGO aerogel shows extremely high sensitivity (22.56 kPa–1), fast response time (<200 ms), and good stability over 10 000 cycles. The Piezoresistive Sensor based on the MX/rGO hybrid 3D aerogel can easily capture the signal below 10 Pa, thus clearly testing the pulse of an adult at random. Based on its superior performance, it also demonstrates potential applications in mea...
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Piezoresistive pressure Sensor based on synergistical innerconnect polyvinyl alcohol nanowires wrinkled graphene film
Small, 2018Co-Authors: Weijie Liu, Yang Yue, Feng Cheng, Jiangyu Rao, Zhitian Liu, Nishuang Liu, Yihua GaoAbstract:Piezoresistive Sensor is a promising pressure Sensor due to its attractive advantages including uncomplicated signal collection, simple manufacture, economical and practical characteristics. Here, a flexible and highly sensitive pressure Sensor based on wrinkled graphene film (WGF)/innerconnected polyvinyl alcohol (PVA) nanowires/interdigital electrodes is fabricated. Due to the synergistic effect between WGF and innerconnected PVA nanowires, the as-prepared pressure Sensor realizes a high sensitivity of 28.34 kPa-1 . In addition, the device is able to discern lightweight rice about 22.4 mg (≈2.24 Pa) and shows excellent durability and reliability after 6000 repeated loading and unloading cycles. What is more, the device can detect subtle pulse beat and monitor various human movement behaviors in real-time.
Changyu Shen - One of the best experts on this subject based on the ideXlab platform.
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multifunctional flexible carbon black polydimethylsiloxane Piezoresistive Sensor with ultrahigh linear range excellent durability and oil water separation capability
Chemical Engineering Journal, 2019Co-Authors: Wei Zhai, Chuntai Liu, Quanjun Xia, Kangkang Zhou, Xiaoyan Yue, Miaoning Ren, Guoqiang Zheng, Kun Dai, Changyu ShenAbstract:Abstract The achievement of favorable pressure Sensor integrated with large linear working range, high sensitivity and excellent response durability is still a great challenge for flexible and wearable Piezoresistive materials. In this paper, a facile and scalable strategy is proposed to fabricate a porous foam Sensor based on carbon black/polydimethylsiloxane (CB/PDMS). CB particles were decorated onto the surface of the cell walls and some particles were embedded into PDMS matrix after the ultrasonication treatment. The density and porosity of the foam are 0.13 g/cm3 and 76.1%, respectively. A very high linear working range (up to 91%), an excellent response stability, a fast response time (45 ms), and a superior durability (>15000 cycles) are achieved synchronously. Here, the large linear sensing range is mainly related to the nice CB conductive network on the cross-linked PDMS foam and the high modulus and elasticity of the composite material, which ensure the homogeneous deformation of the foam under compression. It is worth noting that the response behavior of CB/PDMS foam is maintained well even in water owing to its excellent hydrophobic property (water contact angle up to 149°), indicating that this material can be used as a waterproof Piezoresistive Sensor. Our CB/PDMS foam is then assembled as a wearable Sensor, and it exhibits nice capability of monitoring human body motions, such as the bending of fingers and elbow, walking, jumping and squatting, etc. The porous foam Sensor also has a good oil/water separation ability, showing a multifunctional characteristic.
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Ultrasensitive and Highly Compressible Piezoresistive Sensor Based on Polyurethane Sponge Coated with a Cracked Cellulose Nanofibril/Silver Nanowire Layer.
ACS Applied Materials & Interfaces, 2019Co-Authors: Shuaidi Zhang, Hu Liu, Shuaiyuan Yang, Xianzhang Shi, Dianbo Zhang, Chong-xin Shan, Chuntai Liu, Changyu Shen, Zhanhu GuoAbstract:With the rapid development of flexible wearable electronics, a Piezoresistive Sensor with low detection limit and wide strain sensing range turns out to be a great challenge for its application in this field. Here, a cracked cellulose nanofibril/silver nanowire (CA) layer-coated polyurethane (PU) sponge was acquired through a simple dip-coating process followed by precompression treatment. The electrical conductivity and mechanical property of the conductive CA@PU sponge could be effectively tuned through changing the dip-coating number. As a Piezoresistive Sensor, the sponge exhibited the capability of detecting both small and large motions over a wide compression strain range of 0–80%. Based on the “crack effect”, the Sensor possessed a detection limit as low as 0.2% and the gauge factor [GF, GF = (ΔR/R0)/e, where ΔR, R0, and e represent the instantaneous resistance change, original resistance, and strain applied, respectively] was as high as 26.07 in the strain range of 0–0.6%. Moreover, the “contact e...
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ultrasensitive and highly compressible Piezoresistive Sensor based on polyurethane sponge coated with a cracked cellulose nanofibril silver nanowire layer
ACS Applied Materials & Interfaces, 2019Co-Authors: Shuaidi Zhang, Hu Liu, Shuaiyuan Yang, Xianzhang Shi, Dianbo Zhang, Chong-xin Shan, Chuntai Liu, Changyu Shen, Zhanhu GuoAbstract:With the rapid development of flexible wearable electronics, a Piezoresistive Sensor with low detection limit and wide strain sensing range turns out to be a great challenge for its application in this field. Here, a cracked cellulose nanofibril/silver nanowire (CA) layer-coated polyurethane (PU) sponge was acquired through a simple dip-coating process followed by precompression treatment. The electrical conductivity and mechanical property of the conductive CA@PU sponge could be effectively tuned through changing the dip-coating number. As a Piezoresistive Sensor, the sponge exhibited the capability of detecting both small and large motions over a wide compression strain range of 0–80%. Based on the “crack effect”, the Sensor possessed a detection limit as low as 0.2% and the gauge factor [GF, GF = (ΔR/R0)/e, where ΔR, R0, and e represent the instantaneous resistance change, original resistance, and strain applied, respectively] was as high as 26.07 in the strain range of 0–0.6%. Moreover, the “contact e...
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Ultrasensitive and Highly Compressible Piezoresistive Sensor Based on Polyurethane Sponge Coated with a Cracked Cellulose Nanofibril/Silver Nanowire Layer
2019Co-Authors: Shuaidi Zhang, Hu Liu, Shuaiyuan Yang, Xianzhang Shi, Dianbo Zhang, Chong-xin Shan, Chuntai Liu, Changyu Shen, Zhanhu GuoAbstract:With the rapid development of flexible wearable electronics, a Piezoresistive Sensor with low detection limit and wide strain sensing range turns out to be a great challenge for its application in this field. Here, a cracked cellulose nanofibril/silver nanowire (CA) layer-coated polyurethane (PU) sponge was acquired through a simple dip-coating process followed by precompression treatment. The electrical conductivity and mechanical property of the conductive CA@PU sponge could be effectively tuned through changing the dip-coating number. As a Piezoresistive Sensor, the sponge exhibited the capability of detecting both small and large motions over a wide compression strain range of 0–80%. Based on the “crack effect”, the Sensor possessed a detection limit as low as 0.2% and the gauge factor [GF, GF = (ΔR/R0)/ε, where ΔR, R0, and ε represent the instantaneous resistance change, original resistance, and strain applied, respectively] was as high as 26.07 in the strain range of 0–0.6%. Moreover, the “contact effect” enabled the Sensor to be applicable for larger strain, and the GF decreased first and then became stable with increasing compression strain. In addition, frequency- and strain-dependent sensing performances were observed, demonstrating that the Sensor can respond reliably to different applied frequencies and strains. Furthermore, the Sensor displayed exceptional stability, repeatability, and durability over 500 cycles. Finally, the Sensor could be applicable for the detection of various human bodily motions, such as phonation, stamping, knee bending, and wrist bending. Most importantly, the sponge also exhibited great potential for the fabrication of artificial electronic skin. Herein, the conductive CA@PU sponge will undoubtedly promote the development of high-performance flexible wearable electronics
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Piezoresistive behavior of porous carbon nanotube thermoplastic polyurethane conductive nanocomposites with ultrahigh compressibility
Applied Physics Letters, 2016Co-Authors: Wenju Huang, Guoqiang Zheng, Changyu ShenAbstract:Ultrahigh compressibility has been observed in the lightweight porous carbon nanotube (CNT)-thermoplastic polyurethane (TPU) nanocomposites prepared by the thermally induced phase separation (TIPS) technique. The porous structure has significantly reduced the density to approximately 0.1 g·cm−3. The nanocomposites prepared with a sonication time of 16 min and a filler content of 0.51 vol. % possess uniform CNT distribution and show the highest saturated electrical conductivity. Furthermore, the observed CNT-dependent cell structure changes indicate that the added CNTs favor the formation of thicker and stronger cell structure to enhance its reproductivity as a Piezoresistive Sensor. Piezoresistive behaviors were then conducted under stepwise and cyclic compression. The porous nanocomposites possess fast sensing capacity over a wide strain range (up to 90%). In addition, good Piezoresistive recoverability and reproducibility were observed in the nanocomposites after stabilization by cyclic compression. This study provides a guideline for fabricating porous electrically conductivenanocomposites as promising candidates for the flexible, high sensitive, and stable piezoresistance Sensors.