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제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Nickel and Nickel Oxide Nanoparticles Produced by Pulsed Laser Ablation in Various Solvents

2012년 2월 21일 23시 29분 42초
PHYS.P-496 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 25일 (수요일) 18:00~21:00
저자 및
정현진, 최명룡
경상대학교 화학과, Korea
Nickel and nickel oxide nanoparticles exhibit useful optical or electrical functions as well as catalytic actions. Among various particle fabrication methods, pulsed laser ablation in liquid phase (PLALP) is currently attracting great interest due to its simplicity and versatility. In this study, nickel and nickel oxide nanoparticles were prepared by PLA in various solvents, such as deionized water, methanol, hexane, tetrahydrofuran (THF), and acetonitrile (AN). A pulsed Nd:YAG laser (1064 nm, 10 Hz, 7 ns) is used to produce the nickel and nickel oxide nanoparticles in deionized water; while pure nickel nanoparticles were produced in methanol, hexane THF, and AN. More interestingly, the crystal structures of Ni were also strongly dependent on the solvents used in PLALP. For example, hexagonal closed packing (hcp) and face centered cubic(fcc) structures of Ni were formed in hexane and THF, while pure hcp and fcc structure were fabricated in AN and methanol, respectively. Nickel and nickel oxide nanoparticles, of which size and composition dependence is demonstrated by the laser fluence, ablation time, and the nature of the liquid. Size and optical properties of the nanoparticles were characterized by field emission scanning electronic microscope (FE-SEM), X-ray diffraction (XRD) and ultraviolet-visible spectroscopy (UV-vis).