Energy harvesting model of moving water inside a tubular system and its application of a stick-type compact triboelectric nanogenerator

Choi, Dongwhi; Lee, Sang‐Min; Park, Sang Min; Cho, Handong; Hwang, Woonbong; Kim, Dong Sung

doi:10.1007/s12274-015-0756-4

Cited by 101 publications

(66 citation statements)

References 27 publications

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“…Although this approach has been used in many studies to significantly increase the surface roughness of TENGs, it has the flaw that it always requires high‐vacuum processes, such as e‐beam evaporation followed by dry plasma etching . On the other hand, in the case of surface replication, as one of the powerful techniques to pattern the surface, a contact layer with micro/nanostructures is replicated by pouring liquid‐phase polymers (e.g., Teflon, polydimethylsiloxane) into a mold with micro/nanocavities, followed by solidification . Due to the reusability of the mold and relatively low manufacturing costs, the surface replication process to fabricate TENG can be regarded as a fabrication process one‐step closer to the low‐cost mass production of the TENG.…”

mentioning

confidence: 99%

One‐Step Fabrication of Transparent and Flexible Nanotopographical‐Triboelectric Nanogenerators via Thermal Nanoimprinting of Thermoplastic Fluoropolymers

2015

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Using thermal nanoimprinting, a novel transparent and flexible nanotopographical triboelectric nanogenerator (TENG), with simultaneous nanoreplication and integration of the contact layer with the electrode layer, is first demonstrated. It is expected that the present rapid one-step fabrication methodology well give "disposability" to the TENG with extremely reduced manufacturing costs, which may allay commercialization concerns.

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confidence: 99%

One‐Step Fabrication of Transparent and Flexible Nanotopographical‐Triboelectric Nanogenerators via Thermal Nanoimprinting of Thermoplastic Fluoropolymers

2015

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“…During the confluence of two positively charged droplets, the positive charges on both droplets result in a coulomb force to push them away from each other. While two droplets approach each other, this pushing force gets stronger and finally two droplets may bounce off each other . It is important to note that for the liquid droplets (water or other liquids), the contact electrification with open air or with micropipettor can usually induce positive charges on the droplets .…”

Section: Resultsmentioning

confidence: 99%

Self‐Powered Electrostatic Actuation Systems for Manipulating the Movement of both Microfluid and Solid Objects by Using Triboelectric Nanogenerator

Zheng

Chen

et al. 2017

Adv Funct Materials

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By integrating a triboelectric nanogenerator (TENG) and an electrostatic actuation system (EAS), two kinds of self-powered EAS are designed for manipulating the movement of both microfluid and tiny solid objects. The mechanical triggering of the TENG can generate an extremely high electrostatic field inside EAS and thus the tiny object (liquid or solid) in the EAS can be actuated by the Coulomb force. Accordingly, the tribomotion of TENG can be used as both the driving power and control signal for the EAS. The TENG device with a contact surface of 70 cm 2 can drive a water droplet to move across a gap of 2 cm. Meanwhile, the confluence of two droplets with the same charge polarity and different components can also be induced and controlled by this self-powered EAS. In addition, based on the same working principle, this EAS also demonstrates its capability for manipulating solid object (e.g., a tiny steel pellet). By sliding the Kapton film along a segmented annular electrode, the tiny pellet can well follow the rotated motion of the Kapton film. The demonstrated concept of this self-powered EAS has excellent applicability for various micro/miniature actuation devices, electromechanical systems, human-machine interaction, etc.

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“…The present approach for characterizing two-phase flow configuration based on discrete solid–liquid contact electrification can be applied practically to the development of self-triggered sensors for sensing the gas slug within a continuous aqueous liquid flow inside the microfluidic channel through the generation of a voltage output (electric potential) during the movement of a gas slug. Several recent studies have reported on the use of solid–liquid contact electrification as an energy harvesting method and self-powered or triggered sensors that use the generated electric output 28 29 30 31 . As a proof-of-concept application of such sensor, a gas slug detector with a counter system, which counts the number of gas slugs passing over the electrode, is developed.…”

Section: Resultsmentioning

confidence: 99%

A Simple Approach to Characterize Gas-Aqueous Liquid Two-phase Flow Configuration Based on Discrete Solid-Liquid Contact Electrification

Choi

Lee

Kim

2015

Sci Rep

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In this study, we first suggest a simple approach to characterize configuration of gas-aqueous liquid two–phase flow based on discrete solid-liquid contact electrification, which is a newly defined concept as a sequential process of solid-liquid contact and successive detachment of the contact liquid from the solid surface. This approach exhibits several advantages such as simple operation, precise measurement, and cost-effectiveness. By using electric potential that is spontaneously generated by discrete solid–liquid contact electrification, the configurations of the gas-aqueous liquid two-phase flow such as size of a gas slug and flow rate are precisely characterized. According to the experimental and numerical analyses on parameters that affect electric potential, gas slugs have been verified to behave similarly to point electric charges when the measuring point of the electric potential is far enough from the gas slug. In addition, the configuration of the gas-aqueous liquid two-phase microfluidic system with multiple gas slugs is also characterized by using the presented approach. For a proof-of-concept demonstration of using the proposed approach in a self-triggered sensor, a gas slug detector with a counter system is developed to show its practicality and applicability.

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Energy harvesting model of moving water inside a tubular system and its application of a stick-type compact triboelectric nanogenerator

Cited by 101 publications

References 27 publications

One‐Step Fabrication of Transparent and Flexible Nanotopographical‐Triboelectric Nanogenerators via Thermal Nanoimprinting of Thermoplastic Fluoropolymers

One‐Step Fabrication of Transparent and Flexible Nanotopographical‐Triboelectric Nanogenerators via Thermal Nanoimprinting of Thermoplastic Fluoropolymers

Self‐Powered Electrostatic Actuation Systems for Manipulating the Movement of both Microfluid and Solid Objects by Using Triboelectric Nanogenerator

A Simple Approach to Characterize Gas-Aqueous Liquid Two-phase Flow Configuration Based on Discrete Solid-Liquid Contact Electrification

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