Journal of Powder Materials

L.H. Bac

3 Articles

Characterization and Stability of Silver Nanoparticles in Aqueous Solutions: L.H. Bac, W.H. Gu, J.C. Kim, B.K. Kim, J.S. Kim; J Korean Powder Metall Inst. 2012;19(1):55-59.; DOI: https://doi.org/10.4150/KPMI.2012.19.1.055

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In this work, the silver nanoparticles have been synthesized by electrical explosion of wire in three liquid mediums: deionized water (DIW), polyvinylpyrrolidone (PVP) and sodium dodecyl benzene sulfonate (SDBS) solutions. Absorption in the UV-visible region of these suspensions was measured in the range of 300-800 nm. A surface plasmon peak was observed at ~400 nm in all suspensions in measured wavelength range. Particle size was analyzed by transmission electron microscope. It showed that the particles had nearly spherical shape in all samples. The average particle sizes prepared in DIW, PVP and SDBS solution were 37, 31 and 27 nm, respectively. Stability of the suspensions was estimated by multiple light scattering method. The presence of PVP and SDBS surfactants in the exploding medium resulted in enhanced stability of the silver suspensions.

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Plasma-chemical Synthesis of Silver Nanoparticles in the Presence of Citrate
Margarita Skіba, Alexander Pivovarov, Anna Makarova, Victoria Vorobyova
Chemistry Journal of Moldova.2018; 13(1): 7. CrossRef
Fabrication and Characterization of Ag Particles by Polyol Process and Wet Chemical Process
Juyeon Yoo, Hyosung Jang, Kun-Jae Lee
Journal of Korean Powder Metallurgy Institute.2016; 23(4): 297. CrossRef
A Study of the Preparation and Properties of Antioxidative Copper Inks with High Electrical Conductivity
Chia-Yang Tsai, Wei-Chen Chang, Guan-Lin Chen, Cheng-Huan Chung, Jun-Xiang Liang, Wei-Yang Ma, Tsun-Neng Yang
Nanoscale Research Letters.2015;[Epub] CrossRef
Fabrication of Micro Pattern on Flexible Substrate by Nano Ink using Superhydrophobic Effect
Soo-Jung Son, Young-Sang Cho, Jong Joo Rha, Chul-Jin Cho
Journal of Korean Powder Metallurgy Institute.2013; 20(2): 120. CrossRef

One-step Physical Method for Synthesis of Cu Nanofluid in Ethylene Glycol: L.H. Bac, K.S. Yun, J.S. Kim, J.C. Kim, C.K. Rhee; J Korean Powder Metall Inst. 2010;17(6):464-469.; DOI: https://doi.org/10.4150/KPMI.2010.17.6.464

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The Cu nanofluid in ethylene glycol was prepared by electrical explosion of wire, a novel one-step method. The X-ray diffraction, field emission scanning electron microscope and transmission electron microscope were used to study the properties of Cu nanoparticles. The results showed that the nanoparticles were consisted of pure face-centered cubic structure and near spherical shape with average grain size of 65 nm. Ultraviolet-visible spectroscopy (UV-Vis) confirmed Cu nanoparticles with a single absorbance peak of Cu surface plasmon resonance band at 600 nm. The nanofluid was found to be stable due to high positive zeta potential value, +51 mV. The backscattering level of nanofluid in static stationary was decreased about 2% for 5 days. The thermal conductivity measurement showed that Cu-ethylene glycol nanofluid with low concentration of nanoparticles had higher thermal conductivity than based fluid. The enhancement of thermal conductivity of nanofluid at a volume fraction of 0.1% was approximately 5.2%.

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Enhanced heat transfer of laser-fabricated copper nanofluid at ultra-low concentration driven by the nanoparticle surface area
S. Khamlich, J. Jakobi, T. Khamliche, F. Ismail, O. Nemraoui, C. Rehbock, V. Fester, S. Barcikowski
Journal of Molecular Liquids.2023; 383: 122104. CrossRef
Preparation and thermophysical study on a super stable copper oxide/deep eutectic solvent nanofluid
Changhui Liu, Yu Yan, Wenjie Sun, Xiancong Shi, Ningyu Shi, Yixuan Huo, Jiateng Zhao, Zafar Said, Mohsen Sharifpur
Journal of Molecular Liquids.2022; 356: 119020. CrossRef
Electroexplosive Technology of Nanopowders Production: Current Status and Future Prospects
Young-Soon Kwon, Jin-Chun Kim, Alexander P. Ilyin, Olga B. Nazarenko, Dmitry V. Tikhonov
Journal of Korean Powder Metallurgy Institute.2012; 19(1): 40. CrossRef
Effect of Electrical Parameters and Surrounding Gas on the Electroexplosive Tungsten Nanopowders Characteristics
Young-Soon Kwon, Jin-Chun Kim, Alexander P. Ilyin, Olga B. Nazarenko, Dmitry V. Tikhonov
Journal of Korean Powder Metallurgy Institute.2012; 19(1): 49. CrossRef
Characterization and Stability of Silver Nanoparticles in Aqueous Solutions
L.H. Bac, W.H. Gu, J.C. Kim, B.K. Kim, J.S. Kim
Journal of Korean Powder Metallurgy Institute.2012; 19(1): 55. CrossRef

Production and Properties of Ag Metallic Nanoparticle Fluid by Electrical Explosion of Wire in Liquid: E.J. Park, L.H. Bac, J.S. Kim, Y.S. Kwon, J.C. Kim, H.S. Choi, Y.H. Chung; J Korean Powder Metall Inst. 2009;16(3):217-222.; DOI: https://doi.org/10.4150/KPMI.2009.16.3.217

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This paper presents a novel single-step method to prepare the Ag nanometallic particle dispersed fluid (nanofluid) by electrical explosion of wire in liquid, deionized water (DI water). X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) were used to investigate the characteristics of the Ag nanofluids. Zeta potential was also used to measure the dispersion properties of the as-prepared Ag nanofluid. Pure Ag phase was detected in the nanofluids using water. FE-SEM analysis shows that the size of the particles formed in DI water was about 88 nm and Zeta potential value was about -43.68 without any physical and chemical treatments. Thermal conductivity of the as-prepared Ag particle dispersed nanofluid shows much higher value than that of pure DI water.

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Synthesis and Characterizations of Physical and Antibacterial Properties of the Ag Nanoparticles by Exploding of Wire Technique
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Applied Surface Science.2024; 667: 160348. CrossRef
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Preparation and Characteristics of Fluorinated Carbon Nanotube Applied Capacitive Desalination Electrode with Low Energy Consumption
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Critical heat flux characteristics of nanofluids based on exfoliated graphite nanoplatelets (xGnPs)
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Materials Letters.2012; 81: 193. CrossRef
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Nanoscale Research Letters.2011;[Epub] CrossRef

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