An effective method of producing small neutral carbon dusters Cn （n = 1-6） is described. The small carbon dusters （positive or negative charge or neutral） are formed by plasma which are produced by a high power 53...An effective method of producing small neutral carbon dusters Cn （n = 1-6） is described. The small carbon dusters （positive or negative charge or neutral） are formed by plasma which are produced by a high power 532nm pulse laser ablating the surface of the metal Mn rod to react with small hydrocarbons supplied by a pulse valve, then the neutral carbon clusters are extracted and photo-ionized by another laser （266nm or 355nm） in the ionization region of a linear time-of-flight mass spectrometer. The distributions of the initial neutral carbon dusters are analysed with the ionic species appeared in mass spectra. It is observed that the yield of small carbon dusters with the present method is about 10 times than that of the traditional widely used technology of laser vaporization of graphite.展开更多
基金Support by the National Natural Science Foundation of China under Grant No 29973039, Department of Education of Jiangsu Province （No JHB05-04）, and Southeast University （No XJ0510195）.
文摘An effective method of producing small neutral carbon dusters Cn （n = 1-6） is described. The small carbon dusters （positive or negative charge or neutral） are formed by plasma which are produced by a high power 532nm pulse laser ablating the surface of the metal Mn rod to react with small hydrocarbons supplied by a pulse valve, then the neutral carbon clusters are extracted and photo-ionized by another laser （266nm or 355nm） in the ionization region of a linear time-of-flight mass spectrometer. The distributions of the initial neutral carbon dusters are analysed with the ionic species appeared in mass spectra. It is observed that the yield of small carbon dusters with the present method is about 10 times than that of the traditional widely used technology of laser vaporization of graphite.
