An impedance tunable and highly efficient triboelectric nanogenerator for large-scale, ultra-sensitive pressure sensing applications

Rasel, M. Salauddin; Maharjan, Pukar; Salauddin, Md.; Rahman, M. Toyabur; Cho, Hyun Ok; Kim, Jae Woo; Park, Jae Yeong

doi:10.1016/j.nanoen.2018.04.060

Cited by 139 publications

(75 citation statements)

References 62 publications

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“…The design of sophisticated mechanical systems requires new energy conversion mechanisms for micro‐ and nanogenerators in the energy harvesting field. Some examples of energy conversion mechanisms are piezoelectric, electromagnetic, triboelectric, and electrostatic . Among these mechanisms, electromagnetic generators (EMG) are the most popular for high power generation capability in vibration energy harvesting .…”

Section: Introductionmentioning

confidence: 99%

Biomechanical Energy‐Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics

Rahman

Rana

Salauddin

et al. 2020

Advanced Energy Materials

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The fast growth of smart electronics requires novel solutions to power them sustainably. Portable power sources capable of harvesting biomechanical energy are a promising modern approach to reduce battery dependency. Herein, a novel elastic impact‐based nonresonant hybridized generator (EINR‐HG) is reported to effectively harvest biomechanical energy from diverse human activities outdoors. Through the rational integration of a nonlinear electromagnetic generator with two contact‐mode triboelectric nanogenerators, the proposed EINR‐HG generates hybrid electrical output simultaneously under the same mechanical excitations. By introducing a flux‐concentrator with a nanowire‐nanofiber surface modification, significant improvement in the energy harvesting efficiency of the EINR‐HG is achieved. After optimizing using simulations and vibration tests, the as‐fabricated EINR‐HG delivers an outstanding normalized power density of 3.13 mW cm−3 g−2 across a matching resistance of 1.5 kΩ at 6 Hz under 1 g acceleration. Under human motion testing, the EINR‐HG generates an optimal output power of 131.4 mW with horizontal handshaking. With a customized power management circuit, the EINR‐HG serves as a universal power source that successfully drives commercial smart electronics, including smart bands and smartphones. This work shows the massive potential of biomechanical energy‐driven hybridized generators for powering personal electronics and portable healthcare monitoring devices.

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Section: Introductionmentioning

confidence: 99%

Biomechanical Energy‐Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics

Rahman

Rana

Salauddin

et al. 2020

Advanced Energy Materials

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“…The electrostatic charges generated by periodic contact and separation of two insulator surfaces produce an alternating potential and current. A wide variety of triboelectric device structures are available through simple fabrication, as insulating thin polymer films on electrodes are mounted in configurations that draw on mechanical friction . A triboelectric device is represented by a voltage source, which originates from the separation of the charges, in series connection with a capacitor, which originates from the capacitance between the two surfaces .…”

Section: Sensor Designs and Mechanismsmentioning

confidence: 99%

“…A triboelectric device is represented by a voltage source, which originates from the separation of the charges, in series connection with a capacitor, which originates from the capacitance between the two surfaces . Self‐powered triboelectric pressure sensors have been shown to detect pressure from as high as 450 kPa down to 5 kPa with a sensitivity of 0.5 V kPa −1 . The main limitation is that triboelectric sensors cannot monitor a constant pressure, as they produce electrical signal only under movement from pressure changes.…”

Section: Sensor Designs and Mechanismsmentioning

confidence: 99%

Flexible Pressure Sensors for Objective Assessment of Motor Disorders

Amit

Chukoskie

Skalsky

et al. 2019

Adv Funct Materials

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Monitoring body motion is relevant to motor control disorders as well as assessment of fine motor skills in child development. Furthermore, motion tracking is necessary for rehabilitation monitoring and injury prevention and benefits both sick and healthy individuals. Flexible pressure sensors based on resistors, capacitors, inductors, or transistors are reviewed in the context of healthcare measurements, ranging from physiological signals to body movement characteristics such as grip and gait. To demonstrate the use of flexible pressure sensors for motor assessment, a touch sensing glove that evaluates fine motor skills in autism research is developed. The results show that autistic children perform fewer taps per minute compared to typically developing children, with larger variations in tap durations. In a second example, a force and motion sensing glove is developed to assess spasticity, a neuromuscular disorder that causes muscle stiffness/resistance and jerky movement. Analyses of force versus velocity show movement-dependent muscle resistance in a patient with spasticity. Through these flexible sensor systems, the shift from subjective scores to objective measurement will promote better diagnosis and dramatically improve the accuracy in tracking patient response to therapy.patients doing certain movements, and then clinicians rank each patient's level according to qualitative descriptions in benchmark classification scales. [12,13] The subjective scores can be inconsistent between raters and do not capture finelevel changes in a patient's progress in response to therapy. Therefore, there is a critical need to tackle the issue of imprecise assessment of motor disorders.With recent advances in flexible sensors and innovations in tactile sensing, [14][15][16][17][18][19] we have new low-cost technologies that are prime to facilitate quantitative evaluation of motor control. This progress report presents current developments in wearable sensor systems applicable to motor disorders, so that consistent, objective metrics become available to accurately track whether a treatment effectively relieves symptoms. The wearable sensors are not limited to placement on patients but can also be worn by clinicians or caregivers to assist them in taking measurements during patient interactions. [20,21] The point-of-care sensor systems will allow frequent monitoring, which is highly desirable to offer a better understanding of the patient's short and long-term response to therapies, to tailor treatment and improve outcome and quality of life for patients.Other reviews [14][15][16][17][18][19] have already extensively covered the flexible materials and devices used in tracking vital signs and electronic skin applications. In light of that, this progress report focuses on the applications in monitoring motor skills, in particular to implement pressure sensor designs for wearable systems with diverse form factors, for instance, gloves, [20,22,23] epidermal tags tags, [24,25] and shoe insoles. [26,27] We will discuss the mechanis...

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“…Subsequently, lots of researches about tactile sensor based on vertical contact–separation mode have been investigated to improve the performance . Jiang et al demonstrates a flexible, transparent, and waterproof triboelectric tactile sensor with triboelectric materials of micropyramid‐modified PDMS and indium tin oxide (ITO) separated by PDMS side walls, showing a pressure sensitivity of 2.82 ± 0.187 V MPa −1 .…”

Section: Self‐powered Tactile Sensor Based On the Triboelectric Effectmentioning

confidence: 99%

Self‐Powered Tactile Sensor Array Systems Based on the Triboelectric Effect

Tao

Bao

Wang

et al. 2018

Adv Funct Materials

146

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With the arrival of intelligent terminals, tactile sensors which are capable of sensing various external physical stimuli are considered among the most vital devices for the next generation of smart electronics. To create a self-powered tactile sensor system that can function sustainably and continuously without an external power source is of crucial significance. An overview of the development in self-powered tactile sensor array system based on the triboelectric effect is systematically presented. The combination of multi-functionalization and high performance of tactile sensors aimed at achieving highly comprehensive performance is presented. For the tactile sensor unit, a development is summarized based on the two primary modes which are vertical contact-separation and single-electrode. For the pressure mapping array, the resolution is significantly enhanced by the novel cross-type configuration based on the single-electrode mode. Integrated with other mechanisms, the performance will be further elevated by broadening of the detect range and realizing of visualization of pressure imaging. Then, two main applications of human-machine interaction (HMI) and trajectory monitoring are comprehensively summarized. Finally, the future perspectives of selfpowered tactile sensor system based on triboelectric effect are discussed.

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An impedance tunable and highly efficient triboelectric nanogenerator for large-scale, ultra-sensitive pressure sensing applications

Cited by 139 publications

References 62 publications

Biomechanical Energy‐Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics

Biomechanical Energy‐Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics

Flexible Pressure Sensors for Objective Assessment of Motor Disorders

Self‐Powered Tactile Sensor Array Systems Based on the Triboelectric Effect

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