The Role of the Slope on Taro Leaf Surface to Produce Electrical Energy

Negara, Komang Metty Trisna; Wardana, I.N.G.; Widhiyanuriyawan, Denny; Hamidi, Nurkholis

doi:10.1088/1757-899x/494/1/012084

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…This form was found to be identical at each location observed. The chemical elements in taro leaves are Carbon (C), Nitrogen (N), Oxygen (O), Manganese (Mg), Clor (Cl), Potassium (K), and Calcium (Ca) (Negara, 2019;Negara, 2020;Subagyo, 2017). Despite their small content of Mg, Ca and K are reactive metal elements with good electrical conductivity, taro leaves were found to have a potential use for sustainable energy harvesting on a relatively small scale.…”

Section: Properties Measurementmentioning

confidence: 99%

Characterization of Voltage Generation Obtained from Water Droplets on a Taro Leaf (Colocasia esculenta L) Surface

Marlina,

Alhikami,

Negara

et al. 2023

J. earth energy eng.

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Voltage generation was obtained using a water droplet characterization on a taro (Colocasia esculenta L) leaf surface. This method relies on the superhydrophobic effect from the contact angle between the water droplet and the taro leaf’s surface allowing electron jumping and voltage generation. Water droplets were dropped on the top of taro leaf surface equipped with aluminum foil underneath as an electrode. The voltage was measured at various slope angles of 20°, 40° and 60° in a real-time basis. A digital camera was used to capture the droplet movement and characterization. It is found that the taro leaf has a surface morphology of nano-sized pointed pillars which created a superhydrophobic field. The energy generation was primarily obtained from the electron jump which was caused by the surface tension of the nano-stalagmite structure assisted by the minerals contained in the taro leaf surface. The results reported that the smaller the droplet radius (the smaller the droplet surface area), the greater the droplet surface tension and the greater the voltage generation. Furthermore, the highest voltage generation was obtained 321.2 mV at 20°-degree angle of slopes.

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Section: Properties Measurementmentioning

confidence: 99%

Characterization of Voltage Generation Obtained from Water Droplets on a Taro Leaf (Colocasia esculenta L) Surface

Marlina,

Alhikami,

Negara

et al. 2023

J. earth energy eng.

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“…Research on water droplet behavior on hydrophobic surfaces has been carried out, including research on fluid behavior on grooved hydrophobic surfaces [4], viscous droplet motion on superhydrophobic surfaces due to the influence of magnetic field gradients [24], behavior of water droplets on the polymer surface due to the influence of the field electricity in inclined plane settings [25], and electrowetting in lotus leaves [26]. Whereas taro leaf research in terms of its hydrophobic characteristics has been carried out among others for bio-wax derived for surface coating applications [27], the mechanism of hydrogen bubble formation [28], parameter selection from contact angle analysis [11], hydrophobic paper from taro wax and chitin from crab shell [29], hydrophobic paper used for bags [30], electrical energy harvesting from water droplet [14], the effect of leaf surface slope on energy harvesting [15], and wetting characteristics [13].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Contact angles greater than 150° are classified as superhydrophobic [12,13], that is a small sliding angle (α ~10° or less) and/or a small contact angle hysteresis [12]. Water contact angles for taro leaf were 159.7±1.4° [3], 153.4° [13], 159±2° [11], 167.498° [14,15], and 159.7°±1.4 [6,16]. Taro has a contact angle of hysteresis of around 9° [17].…”

Section: Introductionmentioning

confidence: 99%

A study of light amplification and dispersion by surface tension on water droplet above taro (Colocasia Esculenta) leaf

Rubiono

Sasongko

Siswanto

et al. 2020

EEJET

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Hydrophobic characteristics are widely used in the development of new materials, especially to be applied to the surface coating of materials. This involves amplification of the light exposure on the hydrophobic surface for energy-efficient buildings and photovoltaic energy harvesting systems. The paper discusses the role super-hydrophobic nature of light dispersion falling on the water droplet of the taro leaf surface. Camera and video modes were used to get infrared ray images shot at the water droplet, in dark and bright spaces, with variations in the angle of rays incidence and the volume of droplet. The result shows that the waxy layer surface of the taro leaf has the main structure of alkanes/alkyne with active phenol and aldehydes groups, that peak in 2,648/cm. These active groups bind the atoms (free) of the leaf surface when the leaf surface is in normal conditions. The presence of water bubbles on the surface of the taro leaf causes air to be trapped in the cavity of the lump, forms a silvery layer, resulting in chemical reactions with Mg and K atoms, and dehydrogenation of hydrocarbons. These reactions form metal oxides and hydrogen gas. When the bubble is hit by light, the dispersion tends to strengthen at the light angle greater than 40°, due to the silvery coating of magnesium and potassium oxides and the activity of hydrogen gas, that lead to stronger surface tension and the electron mobility and strengthening water molecules bonds. The activities of these products accelerate atomic movement that amplifies the light energy into white light. This study is expected to be a consideration for the new hydrophobic materials design. Applications for surface coating that can amplify light irradiated on the super-hydrophobic surface are promising for energy-efficient buildings and photovoltaic energy harvesting

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“…In designing a self-powered sensor based on contact electrification, the surface composition [61][62][63][64][65][66], surface structure [67][68][69][70][71][72] and electrode arrangement [73][74][75][76] are of importance. Recent studies have demonstrated that electrodes mounted on the front surface facing the water droplet may provide higher power output than back-electrodes that never come in contact with water [77][78][79][80][81][82].…”

Section: Introductionmentioning

confidence: 99%

Harvesting electrical energy from water drops falling on a vibrating cantilever

Helseth

2022

Smart Mater. Struct.

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In this work a novel thin-film device combining piezoelectric and contact electrification energy harvesting is created with the aim of investigating how it responds to water droplet impact during vibrations. The two energy harvesting principles utilize the same ground electrode, but the electrical signal outputs are independent and show entirely different electrical signal characteristics in presence of external forcing. While piezoelectricity gives rise to a nearly quadratic increase in harvested energy as a function of vibration velocity, the energy due to contact electrification reaches saturation for larger water drop velocities. On the other hand, when the water stream transitions from discrete droplets to a continuous stream the energy gathered from the piezoelectric mechanism exhibits saturation, whereas the energy due to contact electrification decreases. The proposed device may have applications as a self-powered environmental sensor that allow one to distinguish between forced oscillations and water droplet impacts.

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The Role of the Slope on Taro Leaf Surface to Produce Electrical Energy

Cited by 9 publications

References 6 publications

Characterization of Voltage Generation Obtained from Water Droplets on a Taro Leaf (Colocasia esculenta L) Surface

Characterization of Voltage Generation Obtained from Water Droplets on a Taro Leaf (Colocasia esculenta L) Surface

A study of light amplification and dispersion by surface tension on water droplet above taro (Colocasia Esculenta) leaf

Harvesting electrical energy from water drops falling on a vibrating cantilever

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