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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2006.2
- 수록면
- 170 - 176 (7page)
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A spark discharge aerosol generator using air as a carrier gas has successfully been applied to silver nanoparticle production. The spark discharge between two silver electrodes, which was periodically obtained by discharging the capacitor, produced sufficient high temperatures to evaporate a small fraction of the silver electrodes. The silver vapor was subsequently supersaturated by rapid cooling and condensed to silver nanoparticles by nucleation and condensation. The morphology of the generated particles observed by transmission electron microscope was spherical. The element composition of the nanoparticles was silver, which was determined by energy dispersive X-ray spectroscopy. The crystal phase of the particles spark-generated under air atmosphere was composed of silver and silver oxides phase, which was determined by X-ray diffraction analysis. While the nanoparticles generated under nitrogen atmosphere had only silver phase. This XRD data indicates that some fraction of the evaporated silver vapor could be oxidized in air atmosphere by the reaction with oxygen. A stable operation of the spark discharge generator has been achieved. The size and concentration of the particles can be easily controlled by altering the repetition frequency, capacitance, gap distance and flow rate of the spark discharge system.
목차
Abstract
1. 서론
2. 실험
3. 실험 결과 및 고찰
4. 결론
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참고문헌
참고문헌 (17)
참고문헌 신청
Friedlander, S. K., 2000, Smoke, Dust, and Haze-Fundamentals of Aerosol Dynamics, Oxford Press, New York, pp. 331~338.
Schwyn, S., Garwin, E. and Schmidt-Ott, A., 1988, “Aerosol Generation by Spark Discharge,” J. Aerosol Sci., Vol. 19, pp. 639~642.
Burtscher, H. and Schmidt-Ott, A., 1982, “Enormous Enhancement of van der Waals Forces Between Small Silver Particles,” Phys. Rev. Lett. Vol. 48, pp. 1734~1737.
Lee, C. S., Kim, Y. J. and Kim, S. S., 2000, “An Experimental Study on the Characteristics of Direct Photoelectric Charging,” Trans. of the KSME (B), Vol. 24, pp. 753~759.
Watters Jr., R. L., DeVoe, J. R., Shen, F. H., Small, J. A. and Marinenko, R. B., 1989, “Characteristics of Aerosols Produced by the Spark Discharge,” Anal. Chem., Vol. 61, pp. 1826~1833.
Schwyn, S., Garwin, E. and Schmidt-Ott, A., 1988, “Aerosol Generation by Spark Discharge,” J. Aerosol Sci., Vol. 19, pp. 639~642.
Burtscher, H. and Schmidt-Ott, A., 1982, “Enormous Enhancement of van der Waals Forces Between Small Silver Particles,” Phys. Rev. Lett. Vol. 48, pp. 1734~1737.
Lee, C. S., Kim, Y. J. and Kim, S. S., 2000, “An Experimental Study on the Characteristics of Direct Photoelectric Charging,” Trans. of the KSME (B), Vol. 24, pp. 753~759.
Watters Jr., R. L., DeVoe, J. R., Shen, F. H., Small, J. A. and Marinenko, R. B., 1989, “Characteristics of Aerosols Produced by the Spark Discharge,” Anal. Chem., Vol. 61, pp. 1826~1833.
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