Nonintrusion Monitoring of Droplet Motion State <i>via</i> Liquid–Solid Contact Electrification

Song, Zixuan; Zhang, Xiaosong; Zheng, Wanhua; Ren, Tao; Wei, Long; Cheng, Tinghai; Wang, Zhong Lin

doi:10.1021/acsnano.1c08691

Cited by 18 publications

(14 citation statements)

References 38 publications

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“…38 Song et al produced a triboelectric droplet motion state sensor (TDMSS), which could realize droplet counting and droplet size monitoring. 39 These research results show that the sensing method based on a liquid−solid contact TENG is feasible and stable.…”

Section: Introductionmentioning

confidence: 73%

“…Zhang et al constructed an RDE-TENG that obtained the energy of raindrops, which could monitor the temperature and humidity in the greenhouse . Song et al produced a triboelectric droplet motion state sensor (TDMSS), which could realize droplet counting and droplet size monitoring . These research results show that the sensing method based on a liquid–solid contact TENG is feasible and stable.…”

Section: Introductionmentioning

confidence: 99%

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Contactless Boiling State Monitoring in Mini-Channels Based on Triboelectric Nanogenerators

Xiao,

Fu,

et al. 2024

ACS Appl. Electron. Mater.

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The thermal performance and stability of mini-channel heat exchangers are mainly affected by the boiling state of the liquid, but the traditional contact monitoring methods have inevitable drawbacks such as flow interference and electrode contamination. In this paper, a contactless boiling state online monitoring sensor based on a liquid−solid/gas−solid interfacing triboelectric nanogenerator is proposed. The liquid−solid/gas−solid-based triboelectric nanogenerator (L-S/G-S TENG) is made of a poly(tetrafluoroethylene) (PTFE) tube covered by a copper electrode, wherein the electrode is located on the outer surface of the tube. As the liquid in the mini-channel boils, the contact form in the L-S/G-S TENG changes from solid−liquid contact to solid−gas contact, and a voltage signal is generated, identifying the boiling states. The voltage change of deionized water when boiling in a channel with an electrode width of 50 mm and an inner and outer diameter of 3 mm × 5 mm will reach 4.68 V. In addition, the effects of electrode width, channel size, and channel thickness, and liquid property on the performance of the L-S/G-S TENG are systematically investigated. It is found that the signal output of the system would increase with the width of the electrode and mini-channel size but decreases with the increase of channel wall thickness and liquid conductivity. This work not only provides an ingenious method for contactless online monitoring of the liquid boiling state in mini-channels but also makes a solid step forward for the microfluidic sensing technology based on triboelectric nanogenerators.

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Section: Introductionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Contactless Boiling State Monitoring in Mini-Channels Based on Triboelectric Nanogenerators

Xiao,

Fu,

et al. 2024

ACS Appl. Electron. Mater.

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“…The detection accuracy can reach 100% when the time interval between two continuous bubbles is not less than 0.3 s. Song et al also fabricated a triboelectric droplet motion state sensor (TDMSS) based on the gas-liquid two-phase flow. [100] It is found that the number of output voltage pulses has a linear relationship with the liquid input flow rate. The TDMSS can stably achieve droplet counting.…”

Section: Gas-liquid Two-phase Flowmentioning

confidence: 99%

“…also fabricated a triboelectric droplet motion state sensor (TDMSS) based on the gas–liquid two‐phase flow. [ 100 ] It is found that the number of output voltage pulses has a linear relationship with the liquid input flow rate. The TDMSS can stably achieve droplet counting.…”

Section: Triboelectric Fluid Sensorsmentioning

confidence: 99%

Triboelectric Fluid Sensors: Principles, Development, and Perspectives

Wang

Gao

et al. 2022

Adv Materials Technologies

Self Cite

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Various sensors are indispensable for the rapid development of modern engineering and play an important role in human economic development and social progress. The number of these sensors is enormous and widely distributed, it is impractical to use only batteries to drive the entire sensor network. The use of batteries will also bring difficulties in tracking and recycling and possible environmental pollution and health hazards. Consequently, developing selfpowered sensor technologies capable of self-driving operation utilizing ambient energy is highly desirable and necessary.In 2012, Wang's group first invented triboelectric nanogenerators (TENGs), [1,2] its great potential in self-powered systems has attracted widespread attention from researchers. [3,4] The basic working principle of TENGs can be explained by the coupling effect of contact electrification and electrostatic induction effect, [5][6][7] which can convert the energy of the surrounding environment into electrical energy, and has the advantages of simple structure, convenient implementation, diverse material selectivity, and wide application. [8,9] It is considered the most promising alternative to traditional battery technology. [10] As one of the most important and abundant renewable energy sources in natural activities, [11][12][13] fluid energy mainly includes wind energy, airflow energy, droplet energy, water flow energy, and wave energy. Hence, the use of TENGs to harvest these fluid energies for clean, distributed, and self-powered sensing technology is a good option. [14,15] Figure 1 summarizes the typical examples and application scenarios of triboelectric fluid sensors (TFSs) under different fluid energy states in recent years.In this paper, the research status of TFSs is reviewed. First, the basic theory and working modes of TFSs are reviewed, including gas-based and liquid-based. Then, the research progress of gas-based triboelectric sensors, liquid-based triboelectric sensors, and multiphase flow-based triboelectric sensors is introduced, respectively. Many researchers have developed and implemented TFSs designs for different functions, including wind speed, flow, concentration, liquid level, position, motion, etc. In addition, the main applications of TFSs in the fields of natural environment monitoring, industrial pipeline monitoring, urban air purification, industrial wastewater treatment, Fluid energy is one of the most common, widely distributed, and significant renewable energy sources globally, which generally exists in gases and liquids such as wind energy, airflow energy, droplet energy, water flow energy, and wave energy. Since Wang's research group first invented the triboelectric nanogenerators (TENGs) in 2012, it has been widely utilized and developed rapidly as a new energy conversion method and as a promising sensing technology. Especially in fluid sensing, the TENGs get a lot of attention. This paper comprehensively reviews the latest research on triboelectric fluid sensors (TFSs). First, the fundamental theories and bas...

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“…However, due to the need for direct contact with the liquid, they may have drawbacks of sample contamination and analytical complexity. 16 In contrast, non-invasive liquid probes possess unique advantages in assessing liquid characteristics by observing how the liquid interacts with wireless signals 17,18 or optoelectronic detection. Wireless signal-based liquid probes such as radio frequency identification 19 are limited by the need for additional signal emissions, restricting their widespread applications.…”

Section: Introductionmentioning

confidence: 99%

A shadow enabled non-invasive probe for multi-feature intelligent liquid surveillance system

Lian,

Zhang,

et al. 2024

Nanoscale

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Nonintrusion Monitoring of Droplet Motion State via Liquid–Solid Contact Electrification

Cited by 18 publications

References 38 publications

Contactless Boiling State Monitoring in Mini-Channels Based on Triboelectric Nanogenerators

Contactless Boiling State Monitoring in Mini-Channels Based on Triboelectric Nanogenerators

Triboelectric Fluid Sensors: Principles, Development, and Perspectives

A shadow enabled non-invasive probe for multi-feature intelligent liquid surveillance system

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