TY - GEN
T1 - Development of low-current plasma process with ultrasonic cavitations for synthesizing metal-filled carbon nanocapsules in organic solutions
AU - Sergiienko, Ruslan
AU - Shibata, Etsuro
AU - Kim, Sung Hoon
AU - Nakamura, Takashi
PY - 2009
Y1 - 2009
N2 - Nanoparticles of metal carbides (Fe3C, χ-Fe2.5C, Co3C, TiC) wrapped in mutilayered graphitic sheets, called as carbon nanocapsules (CNCs), were synthesized by a new method in which low-current plasma discharge was generated even in insulating organic solutions such as benzene and ethanol due to an ultrasonic irradiation. In this process, ultrasonic horn was utilized not only for ultrasonic irradiation but also for cathode electrode. Anode electrode materials such as iron, cobalt and titanium were optionally selected. In this study, ultrasonic cavitation bubbles were induced between the gap of cathode and anode electrodes in the organic solutions. Consequently, an electric plasma discharge could be generated in liquid organics at power as low as around 45-165 W (DC 30-55 V, 1.5-5 A). The structure, morphology and phases of CNCs were characterized by high-resolution transmission electron microscopy and X-ray diffraction. The magnetic properties (saturation magnetization, coercivity) of the CNCs samples were measured by a vibrating sample magnetometer at room temperature.
AB - Nanoparticles of metal carbides (Fe3C, χ-Fe2.5C, Co3C, TiC) wrapped in mutilayered graphitic sheets, called as carbon nanocapsules (CNCs), were synthesized by a new method in which low-current plasma discharge was generated even in insulating organic solutions such as benzene and ethanol due to an ultrasonic irradiation. In this process, ultrasonic horn was utilized not only for ultrasonic irradiation but also for cathode electrode. Anode electrode materials such as iron, cobalt and titanium were optionally selected. In this study, ultrasonic cavitation bubbles were induced between the gap of cathode and anode electrodes in the organic solutions. Consequently, an electric plasma discharge could be generated in liquid organics at power as low as around 45-165 W (DC 30-55 V, 1.5-5 A). The structure, morphology and phases of CNCs were characterized by high-resolution transmission electron microscopy and X-ray diffraction. The magnetic properties (saturation magnetization, coercivity) of the CNCs samples were measured by a vibrating sample magnetometer at room temperature.
KW - Carbon nanocapsules
KW - Electron microscope
KW - Plasma discharge
KW - Ultrasonic cavitation
UR - http://www.scopus.com/inward/record.url?scp=77950833446&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77950833446&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:77950833446
SN - 9781615674237
T3 - The Minerals, Metals and Materials Society - 3rd International Conference on Processing Materials for Properties 2008, PMP III
SP - 758
EP - 763
BT - The Minerals, Metals and Materials Society - 3rd International Conference on Processing Materials for Properties 2008, PMP III
T2 - 3rd International Conference on Processing Materials for Properties 2008, PMP III
Y2 - 7 December 2008 through 10 December 2008
ER -