Modifikasi Karakteristik Kuat Tarik pada Komposit Film Poli(Vinil Pirolidon) dan Karagenan Melalui Pembentukan Komposit Karbon Nano Dot

Sjahriza, Ahmad; Herlambang, Surya; Wati, Indah

doi:10.15575/ak.v5i2.3756

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…Nanoscale measurements require more precise and specialized techniques due to their sensitive and high precision nature. This can be done as a continuation of this study to complete the properties and characteristics of metallic materials for wider applications [21].…”

Section: Steel Wire Testingmentioning

confidence: 99%

The Elastic Properties of Objects by Determining Young's Modulus for the Characterization of Metal Raw Materials Using a Speed Sensor Encoder and a Load Cell Sensor

Pratiwi

Cahyanto

Sunardi

2023

SAGA

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The unique characteristic of a metal material can be determined from the value of Young's modulus which represents the ability of the material to deform in response to an external force given to the material. This study aims to determine the value of Young's modulus for three metal wires (copper, nickel, and steel) and the percentage of measurement errors using a self-designed Young's modulus kit equipped with a load cell sensor and speed sensor encoder. The measurement of Young's modulus was carried out in five experiments without any variation in diameter (the diameter was fixed and the same for all metals), and the results were compared with the reference values. The results showed that the values of Young's modulus for copper, nickel, and steel wires were 11.74 x 1010 N/m2, 21.63 x 1010 N/m2, and 20.84 x 1010 N/m2, respectively. The difference between the measured values and the reference values for Young's modulus for copper, nickel, and steel wires were 6.7%, 3.0%, and 4.18%, respectively. The small differences between the measured values and the reference values indicate that the measurement approach approximates the reference values and can be used to support other measurements involving Young's modulus values of a metal material

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Section: Steel Wire Testingmentioning

confidence: 99%

The Elastic Properties of Objects by Determining Young's Modulus for the Characterization of Metal Raw Materials Using a Speed Sensor Encoder and a Load Cell Sensor

Pratiwi

Cahyanto

Sunardi

2023

SAGA

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Synthesis of fluorescent composite films PVA/CDots from orange concentrate with microwave technique

Jannah

Isnaeni

Lewa

et al. 2021

J. Phys.: Conf. Ser.

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Carbon dots (CDots) is one of the fluorescent materials that can be made of organic materials. CDots materials can be obtained easily using organic materials that have carbon chain. Synthesis of CDots with orange concentrate as a PVA/CDots composite film using microwave was carried out and the optical properties of synthesized CDots with various concentrations of orange concentrate were observed using excitation wavelength variations by observing emissions of CDots. The successful synthesis of CDots could be recognized by simply irradiating a 405 nm UV laser into a sample and then further characterization using a UV-Vis spectrophotometer and photoluminescence were conducted. The results of UV-Vis characterization showed the effect of concentration variation on the the absorbance peak wavelength. For high concentration, the absorbance peak wavelength is longer than that of low concentration. This is due to the surface state CDots. The characterization of photoluminescence shows CDots emissions. Excitation using a blue laser (1=420 run) produces emission peaks that is in the range of green wavelengths, whereas excitation using green laser (1=532 nm) produces emission peaks that are in the range of yellow-red wavelengths. The results of the synthesized PVA/CDots films from orange concentrates have good potential to be applied as glowing packaging.

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Synthesis of Carbon Dot Nanoparticles (C-Dot) from Seeds and Seedpods of Kesumba Keling (Bixa orellana) using Hydrothermal and Solvothermal Methods

Rosyada,

Sugiarti,

Suparto

2023

J. Kim. Sains Apl.

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C-dot is a 0-dimensional nanoparticle with photoluminescence properties and can be synthesized from plants, such as the Kesumba Keling plant. Kesumba Keling contains a red pigment sourced from the bixin and norbixin dyes containing functional groups like ‒COOH and ‒COO‒. These functional groups are anticipated to enhance the luminescence intensity produced by C-dot. This research focuses on synthesizing C-dots from Kesumba Keling seeds and seedpods using hydrothermal and solvothermal methods. It also involves an analysis of how different solvents and passivation agents affect the luminescence of C-dots, along with a comparison of the resulting fluorescent colors. The highest yield, at 73.26%, was achieved when using Kesumba Keling seedpods and ethanol as the solvent without adding urea. Furthermore, C-dots synthesized using ethanol as the solvent display a stronger luminescent glow compared to those produced using double-distilled water as the solvent. Additionally, all C-dots synthesized in this study emit a blue luminescence. Characterizing C-dots using a UV-Vis spectrophotometer reveals absorption peaks at two different wavelengths: 260‒280 nm and 320‒340 nm. These absorption peak results align with C-dot characteristics, as confirmed by Fourier transform infrared spectrophotometry. When comparing the intensity of C-dots, those derived from Kesumba Keling peel using the double-distilled water solvent with the addition of urea exhibit a higher intensity (measuring at 0.99) than C-dots obtained from Kesumba Keling peel using ethanol as a solvent with added urea. The solvothermal method is deemed the most effective for C-dot synthesis, as it yields the highest luminescence intensity, accompanied by an emission wavelength shift to 491.65 nm.

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Modifikasi Karakteristik Kuat Tarik pada Komposit Film Poli(Vinil Pirolidon) dan Karagenan Melalui Pembentukan Komposit Karbon Nano Dot

Cited by 3 publications

References 4 publications

The Elastic Properties of Objects by Determining Young's Modulus for the Characterization of Metal Raw Materials Using a Speed Sensor Encoder and a Load Cell Sensor

The Elastic Properties of Objects by Determining Young's Modulus for the Characterization of Metal Raw Materials Using a Speed Sensor Encoder and a Load Cell Sensor

Synthesis of fluorescent composite films PVA/CDots from orange concentrate with microwave technique

Synthesis of Carbon Dot Nanoparticles (C-Dot) from Seeds and Seedpods of Kesumba Keling (Bixa orellana) using Hydrothermal and Solvothermal Methods

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