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We prepared the Nd-Fe-B particles with enhanced magnetic properties through cost-effective and facile chemical methods including spray drying and reduction-diffusion (RD) techniques. Since the RD process has considerably affected the structural and magnetic properties of Nd-Fe-B particles so the optimization of heat treatments for RD is in high demand. Different heating rates (5, 10, 20, and 30 °C/min) to reach annealing temperature (1000 °C) of RD and keeping times for the RD process were used to prepare Nd-Fe-B particles. Among them, the sample prepared at 20 °C/min heating rate (HR) with a 5 h RD time exhibited superior magnetic properties including the remanence (MR) of 125 emu/g, saturation magnetization (MS) of 140 emu/g, coercivity (HC) of 2.4 kOe and (BH)max of 10.66 MGOe. This was ascribed to the narrow particle size distribution with the average particle size of about 1.66 µm, and phase purity as well as high crystallinity at optimized HR and RD time. Because the HR was controlling the particle nucleation and growth process and keeping time could ensure the completion of the RD process. This present modified RD process will also be useful to prepare other potential hard-magnetic particles.
Seunghyun Kim; Vitalii Galkin; Jong-Ryul Jeong; Rambabu Kuchi; Dongsoo Kim. Enhanced magnetic and structural properties of chemically prepared Nd-Fe-B particles by reduction-diffusion method through optimization of heat treatments. Journal of Alloys and Compounds 2021, 869, 159337 .
AMA StyleSeunghyun Kim, Vitalii Galkin, Jong-Ryul Jeong, Rambabu Kuchi, Dongsoo Kim. Enhanced magnetic and structural properties of chemically prepared Nd-Fe-B particles by reduction-diffusion method through optimization of heat treatments. Journal of Alloys and Compounds. 2021; 869 ():159337.
Chicago/Turabian StyleSeunghyun Kim; Vitalii Galkin; Jong-Ryul Jeong; Rambabu Kuchi; Dongsoo Kim. 2021. "Enhanced magnetic and structural properties of chemically prepared Nd-Fe-B particles by reduction-diffusion method through optimization of heat treatments." Journal of Alloys and Compounds 869, no. : 159337.
We prepared FeNi/single-walled carbon nanotube (SWCNT) composites with controlled FeNi alloy composition by a simple in situ co-arc discharge process, followed by heat treatment. The electromagnetic (EM) properties of the composites were strongly affected by FeNi alloy composition and SWCNT content. Various FeNi/SWCNT composites were prepared by changing the initial precursor's Fe and Ni concentrations. The prepared composites contained well-dispersed Fe1Ni1 particles on SWCNTs and displayed a strong reflection loss of −42.5 dB with a wide effective bandwidth of 4.9 GHz. This was attributed to their optimized structure and EM properties, which resulted in enhanced interfacial polarization, improved impedance matching, and higher microwave attenuation. Our approach to optimized EM parameters and microwave-absorbing capabilities by adjustment of FeNi alloy composition is a cost-effective method to produce FeNi/SWCNT composites with good microwave-absorbing performance.
Rambabu Kuchi; Hieu Minh Nguyen; Viet Dongquoc; Phuoc Cao Van; Hayeong Ahn; Duc Duong Viet; Dojin Kim; Dongsoo Kim; Jong-Ryul Jeong. Optimization of FeNi/SWCNT composites by a simple co-arc discharge process to improve microwave absorption performance. Journal of Alloys and Compounds 2020, 852, 156712 .
AMA StyleRambabu Kuchi, Hieu Minh Nguyen, Viet Dongquoc, Phuoc Cao Van, Hayeong Ahn, Duc Duong Viet, Dojin Kim, Dongsoo Kim, Jong-Ryul Jeong. Optimization of FeNi/SWCNT composites by a simple co-arc discharge process to improve microwave absorption performance. Journal of Alloys and Compounds. 2020; 852 ():156712.
Chicago/Turabian StyleRambabu Kuchi; Hieu Minh Nguyen; Viet Dongquoc; Phuoc Cao Van; Hayeong Ahn; Duc Duong Viet; Dojin Kim; Dongsoo Kim; Jong-Ryul Jeong. 2020. "Optimization of FeNi/SWCNT composites by a simple co-arc discharge process to improve microwave absorption performance." Journal of Alloys and Compounds 852, no. : 156712.
Fuel cell performance largely relies on the activity of catalyst; hence development of high performance electrocatalysts for the electrooxidation of methanol is highly essential for the further development in fuel cell technology. Herein, we demonstrate a facile hydrothermal approach for the growth of NiCo2O4 nanorods and their application in the methanol electrooxidation. The morphology and surface area investigation reveal the growth of NiCo2O4 nanorods with an average length of 500 nm and a specific surface area of 123 m2/g, respectively. The NiCo2O4 nanorods displayed a larger electrochemical activity towards the electrooxidation of methanol in alkaline pH than the quasi-spherical NiCo2O4 nanoparticles. On the NiCo2O4 nanorod based electrode a higher catalytic current density of 129 mA/cm2 and a high stability with 86% current retention was achieved, signifying that the current non-Pt based catalyst could be a non-expensive alternative candidate for high performance fuel cell application.
Ashok Kumar Das; Swarnabala Jena; Sumanta Sahoo; Rambabu Kuchi; Dongsoo Kim; Talal Aljohani; Ganesh Chandra Nayak; Jong-Ryul Jeong. Facile synthesis of NiCo2O4 nanorods for electrocatalytic oxidation of methanol. Journal of Saudi Chemical Society 2020, 24, 434 -444.
AMA StyleAshok Kumar Das, Swarnabala Jena, Sumanta Sahoo, Rambabu Kuchi, Dongsoo Kim, Talal Aljohani, Ganesh Chandra Nayak, Jong-Ryul Jeong. Facile synthesis of NiCo2O4 nanorods for electrocatalytic oxidation of methanol. Journal of Saudi Chemical Society. 2020; 24 (5):434-444.
Chicago/Turabian StyleAshok Kumar Das; Swarnabala Jena; Sumanta Sahoo; Rambabu Kuchi; Dongsoo Kim; Talal Aljohani; Ganesh Chandra Nayak; Jong-Ryul Jeong. 2020. "Facile synthesis of NiCo2O4 nanorods for electrocatalytic oxidation of methanol." Journal of Saudi Chemical Society 24, no. 5: 434-444.
In recent years, rare earth (RE)-based permanent magnets (PMs) have become a one of most valuable material due to its massive usage in many advanced green technological applications which include electric vehicles (bikes, cars, etc.), wind turbines, and many consumer goods (iPods, hard disc, speakers, etc.). Nd-Fe-B magnets have higher energy product [(BH)max] among all RE-based PMs. Moreover, magnetic properties of Nd-Fe-B particles are key for high-performance Nd-Fe-B magnets and are estimated from phase purity, crystallinity, and structure which can be well controlled from fabrication process of Nd-Fe-B powders. Among the various processing techniques the spray drying-assisted reduction-diffusion (R-D) is favored to produce Nd-Fe-B powders with improved properties in larger yield. Optimization of R-D and washing process is essential to obtain the good magnetic properties. Optimization of these steps results in Nd-Fe-B powders with enhanced magnetic properties: Hc about 5.1 kOe and (BH)max of 22.1 MGOe. The higher properties are attributed to the formation of single phase with high purity, good size distribution of particles, minor defects in the structure, and complete removal of by-products during the washing step. Therefore, the progresses in fabrication techniques and some important steps are discussed in this chapter.
Rambabu Kuchi; Dongsoo Kim. Rare Earth-Based Magnetic Materials: Progresses in the Fabrication Technologies and Magnetic Properties. Rare-Earth Metal Recovery for Green Technologies 2020, 153 -161.
AMA StyleRambabu Kuchi, Dongsoo Kim. Rare Earth-Based Magnetic Materials: Progresses in the Fabrication Technologies and Magnetic Properties. Rare-Earth Metal Recovery for Green Technologies. 2020; ():153-161.
Chicago/Turabian StyleRambabu Kuchi; Dongsoo Kim. 2020. "Rare Earth-Based Magnetic Materials: Progresses in the Fabrication Technologies and Magnetic Properties." Rare-Earth Metal Recovery for Green Technologies , no. : 153-161.
Controlling impedance matching and enhancing absorption properties are crucial for developing next-generation microwave absorbing materials.
Rambabu Kuchi; Taha Latif; Sung Woo Lee; Viet Dongquoc; Phuoc Cao Van; Dongsoo Kim; Jong-Ryul Jeong. Controlling the electric permittivity of honeycomb-like core–shell Ni/CuSiO3 composite nanospheres to enhance microwave absorption properties. RSC Advances 2020, 10, 1172 -1180.
AMA StyleRambabu Kuchi, Taha Latif, Sung Woo Lee, Viet Dongquoc, Phuoc Cao Van, Dongsoo Kim, Jong-Ryul Jeong. Controlling the electric permittivity of honeycomb-like core–shell Ni/CuSiO3 composite nanospheres to enhance microwave absorption properties. RSC Advances. 2020; 10 (2):1172-1180.
Chicago/Turabian StyleRambabu Kuchi; Taha Latif; Sung Woo Lee; Viet Dongquoc; Phuoc Cao Van; Dongsoo Kim; Jong-Ryul Jeong. 2020. "Controlling the electric permittivity of honeycomb-like core–shell Ni/CuSiO3 composite nanospheres to enhance microwave absorption properties." RSC Advances 10, no. 2: 1172-1180.
Viet Dongquoc; Rambabu Kuchi; Phuoc Cao Van; Srivathsava Surabhi; Sung Woo Lee; Dongsoo Kim; Jong-Ryul Jeong. Enhancing magneto-optical and structural properties of Bi-YIG thin film on glass substrate using poly[vinylpyrrolidone](PVP) assisted MOD method. Ceramics International 2019, 45, 20758 -20761.
AMA StyleViet Dongquoc, Rambabu Kuchi, Phuoc Cao Van, Srivathsava Surabhi, Sung Woo Lee, Dongsoo Kim, Jong-Ryul Jeong. Enhancing magneto-optical and structural properties of Bi-YIG thin film on glass substrate using poly[vinylpyrrolidone](PVP) assisted MOD method. Ceramics International. 2019; 45 (16):20758-20761.
Chicago/Turabian StyleViet Dongquoc; Rambabu Kuchi; Phuoc Cao Van; Srivathsava Surabhi; Sung Woo Lee; Dongsoo Kim; Jong-Ryul Jeong. 2019. "Enhancing magneto-optical and structural properties of Bi-YIG thin film on glass substrate using poly[vinylpyrrolidone](PVP) assisted MOD method." Ceramics International 45, no. 16: 20758-20761.
Phuoc Cao Van; Srivathsava Surabhi; Viet Dong Quoc; Jae Woong Lee; Cheong Cheon Tae; Rambabu Kuchi; Jong-Ryul Jeong. Broadband tunable plasmonic substrate using self-assembled gold–silver alloy nanoparticles. Current Applied Physics 2019, 19, 1245 -1251.
AMA StylePhuoc Cao Van, Srivathsava Surabhi, Viet Dong Quoc, Jae Woong Lee, Cheong Cheon Tae, Rambabu Kuchi, Jong-Ryul Jeong. Broadband tunable plasmonic substrate using self-assembled gold–silver alloy nanoparticles. Current Applied Physics. 2019; 19 (11):1245-1251.
Chicago/Turabian StylePhuoc Cao Van; Srivathsava Surabhi; Viet Dong Quoc; Jae Woong Lee; Cheong Cheon Tae; Rambabu Kuchi; Jong-Ryul Jeong. 2019. "Broadband tunable plasmonic substrate using self-assembled gold–silver alloy nanoparticles." Current Applied Physics 19, no. 11: 1245-1251.
Copper cobaltite (CuCo2O4) porous structures with different morphologies are prepared through a hydrothermal method and subsequent annealing process. The tunability of morphologies is succeeded by simply regulation of solvent medium and amount of the polyvinylpyrrolidone (PVP) which is served as structure directing agent. All the prepared samples have a mesoporous nature. Specifically, the CuCo2O4–porous structures with flowers morphology have a higher surface area (43.2 m2/g) and porosity (0.18 cm3/g) than the other porous nano structures such as flakes, blades and wires. The maximum specific capacity of CuCo2O4–Flowers is 466.4 C g–1 at a current density of 2 A g–1. The cycling stability of CuCo2O4–Flowers shows capacity retention of 86.3% at a high current density of 15 A g–1 after completion of 5000 charge‐discharge cycles. The electrochemical results demonstrate that the CuCo2O4–Flower shows superior performance than the CuCo2O4–Flakes, Blade and Wires.
Bal Sydulu Singu; Rambabu Kuchi; Phuoc Cao Van; Dongsoo Kim; Kuk Ro Yoon; Jong Ryul Jeong. Tunability of Porous CuCo 2 O 4 Architectures as High‐Performance Electrode Materials for Supercapacitors. ChemNanoMat 2019, 5, 1398 -1407.
AMA StyleBal Sydulu Singu, Rambabu Kuchi, Phuoc Cao Van, Dongsoo Kim, Kuk Ro Yoon, Jong Ryul Jeong. Tunability of Porous CuCo 2 O 4 Architectures as High‐Performance Electrode Materials for Supercapacitors. ChemNanoMat. 2019; 5 (11):1398-1407.
Chicago/Turabian StyleBal Sydulu Singu; Rambabu Kuchi; Phuoc Cao Van; Dongsoo Kim; Kuk Ro Yoon; Jong Ryul Jeong. 2019. "Tunability of Porous CuCo 2 O 4 Architectures as High‐Performance Electrode Materials for Supercapacitors." ChemNanoMat 5, no. 11: 1398-1407.
[email protected] core–shell nanospheres highly dispersed on carbon supports were rationally designed to improve the microwave absorbing property of the composite material, and fabricated by one pot thermal decomposition and simple annealing process. The Co nanospheres were completely encapsulated with thin carbon shells, which can effectively prevent the oxidation of the Co surface. Additionally, the particle size of Co nanospheres were properly controlled to optimize the electromagnetic property of the composite material. As a result, the lightweight [email protected]/C composites with the particle size of 20 nm exhibited much enhanced microwave absorption properties. The improved microwave absorption performance is attributed mainly to the enhanced isotropic ratio and impedance matching of magnetic composites via tuning the Co particle size. Therefore, the well-designed core-shell [email protected] composite structure will provide a new insight for the development of high performance microwave absorbers.
Rambabu Kuchi; Monika Sharma; Sung Woo Lee; Dongsoo Kim; Namgee Jung; Jong-Ryul Jeong. Rational design of carbon shell-encapsulated cobalt nanospheres to enhance microwave absorption performance. Progress in Natural Science: Materials International 2019, 29, 88 -93.
AMA StyleRambabu Kuchi, Monika Sharma, Sung Woo Lee, Dongsoo Kim, Namgee Jung, Jong-Ryul Jeong. Rational design of carbon shell-encapsulated cobalt nanospheres to enhance microwave absorption performance. Progress in Natural Science: Materials International. 2019; 29 (1):88-93.
Chicago/Turabian StyleRambabu Kuchi; Monika Sharma; Sung Woo Lee; Dongsoo Kim; Namgee Jung; Jong-Ryul Jeong. 2019. "Rational design of carbon shell-encapsulated cobalt nanospheres to enhance microwave absorption performance." Progress in Natural Science: Materials International 29, no. 1: 88-93.
Abnormal levels of dopamine (DA) in body fluids is an indication of serious health issues, hence development of highly sensitive platforms for the precise detection of DA is highly essential.
Ashok Kumar Das; Rambabu Kuchi; Phuoc Cao Van; Youngku Sohn; Jong-Ryul Jeong. Development of an [email protected] silicate based sensing platform for the electrochemical sensing of dopamine. RSC Advances 2018, 8, 31037 -31047.
AMA StyleAshok Kumar Das, Rambabu Kuchi, Phuoc Cao Van, Youngku Sohn, Jong-Ryul Jeong. Development of an [email protected] silicate based sensing platform for the electrochemical sensing of dopamine. RSC Advances. 2018; 8 (54):31037-31047.
Chicago/Turabian StyleAshok Kumar Das; Rambabu Kuchi; Phuoc Cao Van; Youngku Sohn; Jong-Ryul Jeong. 2018. "Development of an [email protected] silicate based sensing platform for the electrochemical sensing of dopamine." RSC Advances 8, no. 54: 31037-31047.
Revealing detailed catalytic and magnetic properties and the corresponding structural changes of Fe oxide materials are extremely important for their diverse applications. For this, magnetic properties of thermally phase transformed β-FeOOH nanorods (NRs) (to porous α-Fe2O3) were examined in the temperature up to 550 °C. The thermal treatment enhances the lattice strain (ε) that facilitates in creating pore structures. Fundamental physicochemical properties were examined by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), diffuse reflectance UV–visible absorption spectroscopy, and X-ray photoelectron spectroscopy (XPS). An average size of pores and pore-size distribution were characterized by Brunauer-Emmett-Teller (BET) surface area analysis. Temperature and field dependent magnetic properties of calcination samples were investigated by vibrating sample magnetometer (VSM) for understanding the morphology-dependent magnetic behavior of NRs. The phase transformation behavior of these thermally treated magnetic NRs was analyzed through magnetic property characterization by considering all possible relationships with lattice strain effects, oxygen vacancies, magnetic, and morphology anisotropy.
Sung Woo Lee; Srivathsava Surabhi; Rambabu Kuchi; Youngku Sohn; Jong-Ryul Jeong. Magnetic/catalytic properties and strain induced structural phase transformation from β-FeOOH to porous α-Fe2O3 nanorods. Journal of Alloys and Compounds 2018, 771, 131 -139.
AMA StyleSung Woo Lee, Srivathsava Surabhi, Rambabu Kuchi, Youngku Sohn, Jong-Ryul Jeong. Magnetic/catalytic properties and strain induced structural phase transformation from β-FeOOH to porous α-Fe2O3 nanorods. Journal of Alloys and Compounds. 2018; 771 ():131-139.
Chicago/Turabian StyleSung Woo Lee; Srivathsava Surabhi; Rambabu Kuchi; Youngku Sohn; Jong-Ryul Jeong. 2018. "Magnetic/catalytic properties and strain induced structural phase transformation from β-FeOOH to porous α-Fe2O3 nanorods." Journal of Alloys and Compounds 771, no. : 131-139.
We investigated the temperature distribution induced by laser irradiation of ultrathin magnetic films by applying a finite element method (FEM) to the finite difference time domain (FDTD) representation for the analysis of thermal induced spin currents. The dependency of the thermal gradient (∇T) of ultrathin magnetic films on material parameters, including the reflectivity and absorption coefficient were evaluated by examining optical effects, which indicates that reflectance (R) and the apparent absorption coefficient (α*) play important roles in the calculation of ∇T for ultrathin layers. The experimental and calculated values of R and α* for the ultrathin magnetic layers irradiated by laser-driven heat sources estimated using the combined FDTD and FEM method are in good agreement for the amorphous CoFeB and crystalline Co layers of thicknesses ranging from 3~20 nm. Our results demonstrate that the optical parameters are crucial for the estimation of the temperature gradient induced by laser illumination for the study of thermally generated spin currents and related phenomena.
Srivathsava Surabhi; Dong-Jun Kim; Phuoc Cao Van; Viet Dong Quoc; Jeong-Mok Kim; Sung Woo Lee; Rambabu Kuchi; Jae-Woong Lee; Soon Yoon; Jihoon Choi; Byong-Guk Park; Jong-Ryul Jeong. Precise Determination of the Temperature Gradients in Laser-irradiated Ultrathin Magnetic Layers for the Analysis of Thermal Spin Current. Scientific Reports 2018, 8, 11337 .
AMA StyleSrivathsava Surabhi, Dong-Jun Kim, Phuoc Cao Van, Viet Dong Quoc, Jeong-Mok Kim, Sung Woo Lee, Rambabu Kuchi, Jae-Woong Lee, Soon Yoon, Jihoon Choi, Byong-Guk Park, Jong-Ryul Jeong. Precise Determination of the Temperature Gradients in Laser-irradiated Ultrathin Magnetic Layers for the Analysis of Thermal Spin Current. Scientific Reports. 2018; 8 (1):11337.
Chicago/Turabian StyleSrivathsava Surabhi; Dong-Jun Kim; Phuoc Cao Van; Viet Dong Quoc; Jeong-Mok Kim; Sung Woo Lee; Rambabu Kuchi; Jae-Woong Lee; Soon Yoon; Jihoon Choi; Byong-Guk Park; Jong-Ryul Jeong. 2018. "Precise Determination of the Temperature Gradients in Laser-irradiated Ultrathin Magnetic Layers for the Analysis of Thermal Spin Current." Scientific Reports 8, no. 1: 11337.
Fe3O4 nanoparticles dispersed on single‐walled carbon nanotube (SWCNT) composites are synthesized through a simple in‐situ co‐arc discharge process followed by an annealing process. A well‐integrated Fe3O4/SWCNT composite exhibiting the strong microwave absorption (MA, −36.9 dB at 10.5 GHz) and a wide effective bandwidth (5.5 GHz) is obtained by controlling the annealing conditions. The high effective MA performance of this composite was ascribed to the well integration of magnetic nanoparticles (Fe3O4) on the SWCNT, creating a synergetic effect. This work demonstrates an economical approach to produce Fe3O4/SWCNT composites with good MA performance.
Rambabu Kuchi; Hieu M. Nguyen; Viet Dongquoc; Phuoc Cao Van; Srivathsava Surabhi; Soon Yoon; Dojin Kim; Jong-Ryul Jeong. In-Situ Co-Arc Discharge Synthesis of Fe3 O4 /SWCNT Composites for Highly Effective Microwave Absorption. physica status solidi (a) 2018, 215, 1 .
AMA StyleRambabu Kuchi, Hieu M. Nguyen, Viet Dongquoc, Phuoc Cao Van, Srivathsava Surabhi, Soon Yoon, Dojin Kim, Jong-Ryul Jeong. In-Situ Co-Arc Discharge Synthesis of Fe3 O4 /SWCNT Composites for Highly Effective Microwave Absorption. physica status solidi (a). 2018; 215 (20):1.
Chicago/Turabian StyleRambabu Kuchi; Hieu M. Nguyen; Viet Dongquoc; Phuoc Cao Van; Srivathsava Surabhi; Soon Yoon; Dojin Kim; Jong-Ryul Jeong. 2018. "In-Situ Co-Arc Discharge Synthesis of Fe3 O4 /SWCNT Composites for Highly Effective Microwave Absorption." physica status solidi (a) 215, no. 20: 1.
Srivathsava Surabhi; Chi Hieu Luong; Min Yi Kim; Phuoc Cao Van; Viet Dong Quoc; Rambabu Kuchi; Jae-Woong Lee; Hyo Sik Chang; Jong-Ryul Jeong. Fill factor controlled nanoimprinted ZnO nanowires based on atomic layer deposition. Current Applied Physics 2018, 18, 767 -773.
AMA StyleSrivathsava Surabhi, Chi Hieu Luong, Min Yi Kim, Phuoc Cao Van, Viet Dong Quoc, Rambabu Kuchi, Jae-Woong Lee, Hyo Sik Chang, Jong-Ryul Jeong. Fill factor controlled nanoimprinted ZnO nanowires based on atomic layer deposition. Current Applied Physics. 2018; 18 (6):767-773.
Chicago/Turabian StyleSrivathsava Surabhi; Chi Hieu Luong; Min Yi Kim; Phuoc Cao Van; Viet Dong Quoc; Rambabu Kuchi; Jae-Woong Lee; Hyo Sik Chang; Jong-Ryul Jeong. 2018. "Fill factor controlled nanoimprinted ZnO nanowires based on atomic layer deposition." Current Applied Physics 18, no. 6: 767-773.
Porous magnetite (Fe3O4) nanospheres are successfully prepared through a one‐pot solvothermal method with a gas‐bubble‐assisted Ostwald ripening process. The formation mechanism is explored by studying the reaction parameters, including the concentration of the precipitating agent, capping agent, and urea gas source for a fixed reaction temperature and time. The authors’ results show that the Fe3O4 nanospheres are composed of many primary nanocrystals, the sizes of which are well regulated by urea concentration. As such, the size of the spherical primary nanocrystal determines the porosity of Fe3O4 nanospheres. Strong reflection loss of −49.2 dB is observed at 11.9 GHz for highly porous Fe3O4 nanospheres with a thickness of 2.7 mm due to multiple scatterings in void spaces and increased dielectric loss caused by higher interfacial polarization relaxation loss in the porous structure. The authors believe that the prepared porous Fe3O4 nanospheres are good candidates for electromagnetic absorption applications.
Rambabu Kuchi; Viet Dongquoc; Srivathsava Surabhi; Dojin Kim; Soon Yoon; Seung-Young Park; Jihoon Choi; Jong-Ryul Jeong. Porous Fe3 O4 Nanospheres with Controlled Porosity for Enhanced Electromagnetic Wave Absorption. physica status solidi (a) 2018, 215, 1 .
AMA StyleRambabu Kuchi, Viet Dongquoc, Srivathsava Surabhi, Dojin Kim, Soon Yoon, Seung-Young Park, Jihoon Choi, Jong-Ryul Jeong. Porous Fe3 O4 Nanospheres with Controlled Porosity for Enhanced Electromagnetic Wave Absorption. physica status solidi (a). 2018; 215 (20):1.
Chicago/Turabian StyleRambabu Kuchi; Viet Dongquoc; Srivathsava Surabhi; Dojin Kim; Soon Yoon; Seung-Young Park; Jihoon Choi; Jong-Ryul Jeong. 2018. "Porous Fe3 O4 Nanospheres with Controlled Porosity for Enhanced Electromagnetic Wave Absorption." physica status solidi (a) 215, no. 20: 1.
Phuoc Cao Van; Srivathsava Surabhi; Viet Dongquoc; Rambabu Kuchi; Soon-Gil Yoon; Jong-Ryul Jeong. Effect of annealing temperature on surface morphology and ultralow ferromagnetic resonance linewidth of yttrium iron garnet thin film grown by rf sputtering. Applied Surface Science 2018, 435, 377 -383.
AMA StylePhuoc Cao Van, Srivathsava Surabhi, Viet Dongquoc, Rambabu Kuchi, Soon-Gil Yoon, Jong-Ryul Jeong. Effect of annealing temperature on surface morphology and ultralow ferromagnetic resonance linewidth of yttrium iron garnet thin film grown by rf sputtering. Applied Surface Science. 2018; 435 ():377-383.
Chicago/Turabian StylePhuoc Cao Van; Srivathsava Surabhi; Viet Dongquoc; Rambabu Kuchi; Soon-Gil Yoon; Jong-Ryul Jeong. 2018. "Effect of annealing temperature on surface morphology and ultralow ferromagnetic resonance linewidth of yttrium iron garnet thin film grown by rf sputtering." Applied Surface Science 435, no. : 377-383.
Viet Dongquoc; Rambabu Kuchi; Phuoc Cao Van; Soon-Gil Yoon; Jong-Ryul Jeong. Effects of heating rate on the magneto-optical properties of bismuth-substituted yttrium iron garnet films prepared via modified metal-organic decomposition. Current Applied Physics 2018, 18, 241 -245.
AMA StyleViet Dongquoc, Rambabu Kuchi, Phuoc Cao Van, Soon-Gil Yoon, Jong-Ryul Jeong. Effects of heating rate on the magneto-optical properties of bismuth-substituted yttrium iron garnet films prepared via modified metal-organic decomposition. Current Applied Physics. 2018; 18 (2):241-245.
Chicago/Turabian StyleViet Dongquoc; Rambabu Kuchi; Phuoc Cao Van; Soon-Gil Yoon; Jong-Ryul Jeong. 2018. "Effects of heating rate on the magneto-optical properties of bismuth-substituted yttrium iron garnet films prepared via modified metal-organic decomposition." Current Applied Physics 18, no. 2: 241-245.
Rambabu Kuchi; Viet Dongquoc; Dojin Kim; Soon Yoon; Seung-Young Park; Jong-Ryul Jeong. Large-scale room-temperature aqueous synthesis of Co superstructures with controlled morphology, and their application to electromagnetic wave absorption. Metals and Materials International 2017, 23, 405 -411.
AMA StyleRambabu Kuchi, Viet Dongquoc, Dojin Kim, Soon Yoon, Seung-Young Park, Jong-Ryul Jeong. Large-scale room-temperature aqueous synthesis of Co superstructures with controlled morphology, and their application to electromagnetic wave absorption. Metals and Materials International. 2017; 23 (2):405-411.
Chicago/Turabian StyleRambabu Kuchi; Viet Dongquoc; Dojin Kim; Soon Yoon; Seung-Young Park; Jong-Ryul Jeong. 2017. "Large-scale room-temperature aqueous synthesis of Co superstructures with controlled morphology, and their application to electromagnetic wave absorption." Metals and Materials International 23, no. 2: 405-411.
Maddaka Reddeppa; Byung-Guon Park; Sang-Tae Lee; Moon-Deock Kim; Rambabu Kuchi; Jong-Ryul Jeong. Ferromagnetic properties of GaN nanorods: Effect of silicon doping and hydrogenation. Current Applied Physics 2016, 16, 886 -889.
AMA StyleMaddaka Reddeppa, Byung-Guon Park, Sang-Tae Lee, Moon-Deock Kim, Rambabu Kuchi, Jong-Ryul Jeong. Ferromagnetic properties of GaN nanorods: Effect of silicon doping and hydrogenation. Current Applied Physics. 2016; 16 (8):886-889.
Chicago/Turabian StyleMaddaka Reddeppa; Byung-Guon Park; Sang-Tae Lee; Moon-Deock Kim; Rambabu Kuchi; Jong-Ryul Jeong. 2016. "Ferromagnetic properties of GaN nanorods: Effect of silicon doping and hydrogenation." Current Applied Physics 16, no. 8: 886-889.
In this study, we report an environment friendly and surfactant free modified polyol process involving all of metal precursors are metal chlorides to synthesize high magnetization FeCo nanoparticles. Co chloride instead of Co acetate has been used to synthesize small size (60Co40. We have observed that the FeCo binary composition of the nanoparticles can be easily controlled by altering the concentration of the Fe and Co chloride precursors. X-ray diffraction (XRD) confirms that single phase body-centered-cubic structured FeCo for all compositions. Uniform spherical FeCo nanoparticles can be synthesized with a high degree of morphological control by introducing ultrasound irradiation.
Rambabu Kuchi; Kyung-Min Lee; Yelim Lee; Chi Hieu Luong; Kyong-Dong Lee; Byong-Guk Park; Jong-Ryul Jeong. Synthesis of Highly Magnetic FeCo Nanoparticles Through a One Pot Polyol Process Using All Metal Chlorides Precursors with Precise Composition Tunability. Nanoscience and Nanotechnology Letters 2015, 7, 734 -737.
AMA StyleRambabu Kuchi, Kyung-Min Lee, Yelim Lee, Chi Hieu Luong, Kyong-Dong Lee, Byong-Guk Park, Jong-Ryul Jeong. Synthesis of Highly Magnetic FeCo Nanoparticles Through a One Pot Polyol Process Using All Metal Chlorides Precursors with Precise Composition Tunability. Nanoscience and Nanotechnology Letters. 2015; 7 (9):734-737.
Chicago/Turabian StyleRambabu Kuchi; Kyung-Min Lee; Yelim Lee; Chi Hieu Luong; Kyong-Dong Lee; Byong-Guk Park; Jong-Ryul Jeong. 2015. "Synthesis of Highly Magnetic FeCo Nanoparticles Through a One Pot Polyol Process Using All Metal Chlorides Precursors with Precise Composition Tunability." Nanoscience and Nanotechnology Letters 7, no. 9: 734-737.