MASS-DISTRIBUTION OF C-60 AND C-70 COALESCENCE PRODUCTS PRODUCED BY DIRECT LASER

2020-04-05 17:47:00

mass 60 70 TOF spectrometry

责任者: LIU, ZY;WANG, CR;HUANG, RB;ZHENG, LS 单位: XIAMEN UNIV,DEPT CHEM,STATE KEY LAB PHYS CHEM SOLID SURFACE,XIAMEN 361005,PEOPLES R CHINA. 来源出处: INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES, v 145, JUL 21 1995, p 1- 7 摘要: Both C-60 and C-70 were found to be coalesced by direct laser vaporization in high vacuum and without any buffer gas. The time-of-flight (TOF) mass spectra of both positive and negative coalescence products are presented and the results show that C-60 and C-70 can be similarly coalesced in laser plasma to form larger fullerenes. The coalescence process is independent of the charge of the fullerenes but can be affected by the laser fluence and other experimental conditions. By analyzing the mass distribution of coalescence products and comparing them with the fullerenes generated from carbon nanotubes, aromatic compounds or amorphous carbon, it is suggested that the aggregates of C-60 and C-70 may have tubular configurations. 关键词: COALESCENCE; DIRECT LASER VAPORIZATION; FULLERENE; MASS DISTRIBUTION; TOF MASS SPECTROMETRY TOF MASS SPECTROMETRY;