scholarly journals A Flexible and Highly Sensitive Pressure Sensor Based on AgNWs/NRLF for Hand Motion Monitoring

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 945 ◽  
Author(s):  
Yi Sun ◽  
Zhaoqun Du
Keyword(s):  
Silver Nanowires ◽  
Low Cost ◽  
Three Dimensional ◽  
Pressure Sensors ◽  
Natural Rubber Latex ◽  
Dip Coating ◽  
Electrical Signal ◽  
Environmental Friendliness ◽  
Hand Motion ◽  
Highly Sensitive

Flexible, highly sensitive, easy fabricating process, low-cost pressure sensors are the trend for flexible electronic devices. Inspired by the softness, comfortable, environmental friendliness and harmless of natural latex mattress, herein, we report an agile approach of constructing a flexible 3D-architectured conductive network by dip-coating silver nanowires (AgNWs) on the natural rubber latex foam (NRLF) substrate that provide the 3D micro-network structure as the skeleton. The variation of the contact transformed into the electrical signal among the conductive three-dimensional random networks during compressive deformation is the piezoresistive effect of AgNWs/NRLF pressure sensors. The resulting AgNWs/NRLF pressure sensors exhibit desirable electrical conductivity (0.45–0.50 S/m), excellent flexibility (58.57 kPa at 80% strain), good hydrophobicity (~128° at 5th dip-coated times) and outstanding repeatability. The AgNWs/NRLF sensors can be assembled on a glove to detect hand motion sensitively such as bending, touching and holding, show potential application such as artificial skin, human prostheses and health monitoring in multifunctional pressure sensors.

scholarly journals A Highly Sensitive and Flexible Capacitive Pressure Sensor Based on a Porous Three-Dimensional PDMS/Microsphere Composite

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1412 ◽  
Author(s):  
Young Jung ◽  
Wookjin Lee ◽  
Kyungkuk Jung ◽  
Byunggeon Park ◽  
Jinhyoung Park ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Sacrificial Layer ◽  
Three Dimensional ◽  
Pressure Sensors ◽  
Capacitive Pressure Sensor ◽  
Mechanical Stimuli ◽  
Highly Sensitive ◽  
Flexible Pressure Sensors ◽  
Fast Rise ◽  
Better Than

In recent times, polymer-based flexible pressure sensors have been attracting a lot of attention because of their various applications. A highly sensitive and flexible sensor is suggested, capable of being attached to the human body, based on a three-dimensional dielectric elastomeric structure of polydimethylsiloxane (PDMS) and microsphere composite. This sensor has maximal porosity due to macropores created by sacrificial layer grains and micropores generated by microspheres pre-mixed with PDMS, allowing it to operate at a wider pressure range (~150 kPa) while maintaining a sensitivity (of 0.124 kPa−1 in a range of 0~15 kPa) better than in previous studies. The maximized pores can cause deformation in the structure, allowing for the detection of small changes in pressure. In addition to exhibiting a fast rise time (~167 ms) and fall time (~117 ms), as well as excellent reproducibility, the fabricated pressure sensor exhibits reliability in its response to repeated mechanical stimuli (2.5 kPa, 1000 cycles). As an application, we develop a wearable device for monitoring repeated tiny motions, such as the pulse on the human neck and swallowing at the Adam’s apple. This sensory device is also used to detect movements in the index finger and to monitor an insole system in real-time.

Three-dimensional interconnected Co(OH)2 nanosheets on Ti mesh as a highly sensitive electrochemical sensor for hydrazine detection

2019 ◽  
Vol 43 (7) ◽  
pp. 3218-3225 ◽  
Author(s):  
Jiankang Wang ◽  
Taiping Xie ◽  
Qihuang Deng ◽  
Yajing Wang ◽  
Quanxi Zhu ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Low Cost ◽  
Three Dimensional ◽  
Electrodeposition Method ◽  
Highly Sensitive ◽  
Ti Mesh

Three-dimensional interconnected Co(OH)2 nanosheets on TM, prepared by low cost and simple electrodeposition method, exhibit highly sensitive electrochemical hydrazine detection.

scholarly journals Sensitive capacitive pressure sensors based on graphene membrane arrays

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Makars Šiškins ◽  
Martin Lee ◽  
Dominique Wehenkel ◽  
Richard van Rijn ◽  
Tijmen W. de Jong ◽  
...  
Keyword(s):  
Low Cost ◽  
Pressure Sensors ◽  
Small Diameter ◽  
Circuit Board ◽  
High Temperature Annealing ◽  
Layer Graphene ◽  
Graphene Membrane ◽  
Highly Sensitive ◽  
High Flexibility ◽  
Graphene Membranes

AbstractThe high flexibility, impermeability and strength of graphene membranes are key properties that can enable the next generation of nanomechanical sensors. However, for capacitive pressure sensors, the sensitivity offered by a single suspended graphene membrane is too small to compete with commercial sensors. Here, we realize highly sensitive capacitive pressure sensors consisting of arrays of nearly ten thousand small, freestanding double-layer graphene membranes. We fabricate large arrays of small-diameter membranes using a procedure that maintains the superior material and mechanical properties of graphene, even after high-temperature annealing. These sensors are readout using a low-cost battery-powered circuit board, with a responsivity of up to $$47.8$$ 47.8  aF Pa−1 mm−2, thereby outperforming the commercial sensors.

CuO nanothorn arrays on three-dimensional copper foam as an ultra-highly sensitive and efficient nonenzymatic glucose sensor

RSC Advances ◽  
2016 ◽  
Vol 6 (20) ◽  
pp. 16474-16480 ◽  
Author(s):  
Wangdong Lu ◽  
Yujing Sun ◽  
Haichao Dai ◽  
Pengjuan Ni ◽  
Shu Jiang ◽  
...  
Keyword(s):  
Glucose Sensor ◽  
Low Cost ◽  
Three Dimensional ◽  
Nonenzymatic Glucose Sensor ◽  
Copper Foam ◽  
Highly Sensitive ◽  
Cu Foam

A novel glucose sensor based on a CuO nanothorns/Cu foam was prepared using a low-cost and facile method.

scholarly journals Flexible piezocapacitive sensors based on wrinkled microstructures: toward low-cost fabrication of pressure sensors over large areas

RSC Advances ◽  
2017 ◽  
Vol 7 (63) ◽  
pp. 39420-39426 ◽  
Author(s):  
Seolhee Baek ◽  
Hayeong Jang ◽  
So Young Kim ◽  
Heejeong Jeong ◽  
Singu Han ◽  
...  
Keyword(s):  
Low Cost ◽  
Pressure Sensors ◽  
Large Area ◽  
Highly Sensitive

Wrinkled elastomeric templates prepared by stretching and releasing are utilized for demonstrating highly sensitive, simple, and low-cost piezocapacitive pressure sensors over large area.

scholarly journals Highly sensitive polyaniline-coated fiber gas sensors for real-time monitoring of ammonia gas

RSC Advances ◽  
2019 ◽  
Vol 9 (46) ◽  
pp. 26773-26779 ◽  
Author(s):  
Naraporn Indarit ◽  
Yong-Hoon Kim ◽  
Nattasamon Petchsang ◽  
Rawat Jaisutti
Keyword(s):  
Real Time ◽  
Gas Sensors ◽  
Low Cost ◽  
Cost Effective ◽  
Dip Coating ◽  
Real Time Monitoring ◽  
Polyester Yarn ◽  
Ammonia Gas ◽  
Coated Fiber ◽  
Highly Sensitive

Low-cost effective real-time ammonia detector by a simple dip-coating a single polyester yarn with functional polyaniline.

scholarly journals Low-Cost and Highly Sensitive Wearable Sensor Based on Napkin for Health Monitoring

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3427 ◽  
Author(s):  
Liping Xie ◽  
Peng Chen ◽  
Shuo Chen ◽  
Kun Yu ◽  
Hongbin Sun
Keyword(s):  
Silver Nanowires ◽  
Low Cost ◽  
Simultaneous Detection ◽  
High Sensitivity ◽  
Capacitive Sensor ◽  
Wearable Electronics ◽  
Home Based ◽  
Highly Sensitive ◽  
Machine Interface ◽  
Touch Panels

The development of sensors with high sensitivity, good flexibility, low cost, and capability of detecting multiple inputs is of great significance for wearable electronics. Herein, we report a napkin-based wearable capacitive sensor fabricated by a novel, low-cost, and facile strategy. The capacitive sensor is composed of two pieces of electrode plates manufactured by spontaneous assembly of silver nanowires (NWs) on a polydimethylsiloxane (PDMS)-patterned napkin. The sensor possesses high sensitivity (>7.492 kPa−1), low cost, and capability for simultaneous detection of multiple signals. We demonstrate that the capacitive sensor can be applied to identify a variety of human physiological signals, including finger motions, eye blinking, and minute wrist pulse. More interestingly, the capacitive sensor comfortably attached to the temple can simultaneously monitor eye blinking and blood pulse. The demonstrated sensor shows great prospects in the applications of human–machine interface, prosthetics, home-based healthcare, and flexible touch panels.

Flexible and Highly Sensitive Piezoresistive Pressure Sensor with Sandpaper as a Mold

NANO ◽  
2019 ◽  
Vol 14 (07) ◽  
pp. 1950081 ◽  
Author(s):  
Wendan Jia ◽  
Qiang Zhang ◽  
Yongqiang Cheng ◽  
Dong Zhao ◽  
Yan Liu ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Mass Production ◽  
Silver Nanowires ◽  
Low Cost ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Device Structure ◽  
Simple Method ◽  
Piezoresistive Pressure Sensor ◽  
Flexible Pressure Sensors

Flexible pressure sensors based on piezoresistive induction have recently become a research hotspot due to the simple device structure, low energy consumption, easy readout mechanism and excellent performance. For practical applications, flexible pressure sensors with both high sensitivity and low-cost mass production are highly desirable. Herein, this paper presents a high-sensitivity piezoresistive pressure sensor based on a micro-structured elastic electrode, which is low cost and can be mass-produced by a simple method of sandpaper molding. The micro-structure of the electrode surface under external pressure causes a change in the effective contact area and the distance between the electrodes, which exhibits great pressure sensitivity. The test results show that the surface structure is twice as sensitive as the planar structure under low pressure conditions. This is because of the special morphology of silver nanowires (AgNWs), which exhibits the tip of nanostructures on the surface and realizes the quantum tunneling mechanism. The sensor has high sensitivity for transmitting signals in real time and it can also be used to detect various contact actions. The low cost mass production and high sensitivity of flexible pressure sensors pave the way for electronic skin, wearable healthcare monitors and contact inspection applications.

Fabrication of Low-Cost and Highly Sensitive Graphene-Based Pressure Sensors by Direct Laser Scribing Polydimethylsiloxane

2019 ◽  
Vol 11 (6) ◽  
pp. 6195-6200 ◽  
Author(s):  
Yunsong Zhu ◽  
Hongbing Cai ◽  
Huaiyi Ding ◽  
Nan Pan ◽  
Xiaoping Wang
Keyword(s):  
Low Cost ◽  
Pressure Sensors ◽  
Laser Scribing ◽  
Highly Sensitive ◽  
Direct Laser
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