Tailoring the viscosity of water and ethylene glycol based TiO2 nanofluids

Abdullah, Abu Musa; Chowdhury, Anindya Roy; Yang, Yingchen; Vasquez, Horacio; Moore, H. Justin; Parsons, Jasón G.; Lozano, Karen; Gutierrez, Jose J.; Martirosyan, Karen S.; Uddin, M. Jasim

doi:10.1016/j.molliq.2019.111982

Cited by 42 publications

(14 citation statements)

References 91 publications

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“…This demand of energy will be doubled by the end of 2035 which is also expected to increase in an order of 1 GW per day till 2050 [3,4]. However, due to the limitation of natural resource and environmental pollution caused by energy production and consumption, experts are focusing towards sustainable development and green energy for meeting the energy demand for today and tomorrow [5][6][7][8]. One of the ways to meet up this demand can be harvesting unanimously available mechanical energy from the environment which is widely known as energy scavenging.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and fabrication of self-sustainable triboelectric energy case for powering smart electronic devices

et al. 2020

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In recent times, Triboelectric Nanogenerators (TENG) have attained the focus of the scientific community due to its potential as a medium to harvest mechanical energy from the ambient environment. Human motion has been attributed as a source of mechanical energy to drive electronic devices and sensors through TENG. Based on the principles of single electrode TENG, we have developed a Triboelectricity based Stepping and Tapping Energy Case (TESTEC) which magnifies the prospect to power touch electronic devices by utilizing finger tapping and stepping motion. This novel case was constructed with two single electrode TENG operating through the triboelectric mechanism between human skin and Polyethylene terephthalate(PET) film on the front part and Nitrile Butadiene Rubber(NBR) and PET film on the back part. This cost effective device was further tested by attaching with a cell phone at variable load frequency, airgap and finger combinations where the output response increased with the increased frequencies (60 to 240 BPM) and air gap (1cm to 5cm). Maximum output voltages of 14.8 V and 50.8 V were obtained for the front and back parts, respectively. Besides, maximum output powers were observed to be 3.78 W/m 2 at 0.46 MΩ and 6.21 W/m 2 at 1.02 MΩ, respectively. Also, the device was tested by integrating with conventional electronic components including capacitors, bridge rectifiers and 15 LEDs. Based on the results, a electrical circuit has been proposed to power touch cell phones. The device was further modified using Silver (Ag) nanoparticles in the front part. The modified TESTEC provided higher output response compared to the primary TESTEC. The TESTEC can be a self sustainable way to power touch electronic devices which can reudce the necessity to charge electronics devices in the conventional way.

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Section: Introductionmentioning

confidence: 99%

Synthesis and fabrication of self-sustainable triboelectric energy case for powering smart electronic devices

et al. 2020

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“…There have been several studies which utilized triboelectricity as motion sensors before (Chowdhury, Lopez, Abdullah, & Uddin, 2019; Huang, Li & Sun, 2016; Abdullah, Chowdhury, et al, 2020; Liang et al., 2019; Yi et al., 2015; Zhang et al., 2018). However, there has not been any dedicated triboelectric motion sensor as well as vocal sensor.…”

Section: Vocal Sensormentioning

confidence: 99%

“…Since mechanical energy is already present in human activity, these nanogenerators bioharvest such a ‘wasted’ energy and convert it into useful energy. In this way, TENGs become self‐powering motion sensors (Abdullah, Chowdhury, et al, 2020; Yang et al., 2018; Zhang et al., 2019). TENGs are cost‐effective, flexible, lightweight, highly sensitive to motion and non‐toxic (Wang et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

Decentralized triboelectric electronic health monitoring flexible microdevice

et al. 2020

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Triboelectric nanogenerators (TENGs) are clean self-powering devices that efficiently convert mechanical energy to electrical energy (Wang, Yang, & Wang, 2017). Since mechanical energy is already present in human activity, these nanogenerators bioharvest such a 'wasted' energy and convert it into useful energy. In this way, TENGs become self-powering motion sensors (Abdullah, Chowdhury, et al., 2020; Yang et al., 2018; Zhang et al., 2019). TENGs are cost-effective, flexible, lightweight, highly sensitive to motion and non-toxic (Wang et al., 2017). These features have attracted the attention of the research development industry, and of professionals interested in collecting real-time body movement. Moreover, the compact size of the TENG permits it to be integrated into assorted wearable items.

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“…Triboelectricity is a rapidly expanding form of science that is constantly being changed and there is still much to be tested to determine the most optimal combination of material and their possible functions. [4][5][6][7] In the past, motion sensors have been limited to a finite number of concepts all of which are either highly priced or inaccurate. Methods such as a thermal recognition sensor and imaging optics are the most widely used in today's motion sensors.…”

Section: Introductionmentioning

confidence: 99%

“…[15][16][17][18] Particularly, triboelectric nanogenerator has been an emerging technology for motion sensing and pressure sensing applications. [3,7,19] This research focuses on a DOI: 10.1002/ente.202100662…”

Section: Introductionmentioning

confidence: 99%

Flexible Bielectrode‐Based Highly Sensitive Triboelectric Motion Sensor: A Sustainable and Smart Electronic Material

et al. 2022

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The self‐powered and autonomous sensors are incredibly important in advanced engineering, especially defence science. The increasing necessity of simple and smart electronics requires to be sustainably flexible, wearable, and waterproof. Triboelectricity has been a widely used mechanism for motion sensing nowadays. Almost all devices based on triboelectricity require contact between two surfaces. Herein, a touchless triboelectric motion sensor for human motion sensing and movement monitoring is developed. The device was primarily fabricated using simple latex (cis‐1,4‐polyisoprene) structures and copper (electrode materials), which make it a very cost‐effective device for sensory applications. The device is tested with specimens of different areas and heights in motion. The maximum output of the device is noted as 12 V at a specimen height of 5 cm. Further different types of human motions are applied in front of the device to ensure low energy sensitivity using triboelectric phenomena. The lightweight smart device precisely provides significant output signals for each movement of the human body which makes the device a prospective medium for motion sensing and movement monitoring which can be applied in the fields of security, energy, and medicine.

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Tailoring the viscosity of water and ethylene glycol based TiO2 nanofluids

Cited by 42 publications

References 91 publications

Synthesis and fabrication of self-sustainable triboelectric energy case for powering smart electronic devices

Synthesis and fabrication of self-sustainable triboelectric energy case for powering smart electronic devices

Decentralized triboelectric electronic health monitoring flexible microdevice

Flexible Bielectrode‐Based Highly Sensitive Triboelectric Motion Sensor: A Sustainable and Smart Electronic Material

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