Magnetic field enhanced growth of carbon cluster ions in the laser ablation plume of graphite

被引：30
作者：
Kokai, F
Koga, Y
Heimann, RB
机构：
[1] NATL INST MAT & CHEM RES,TSUKUBA,IBARAKI 305,JAPAN
[2] FREIBERG UNIV MIN & TECHNOL,D-09596 FREIBERG,GERMANY
来源：
APPLIED SURFACE SCIENCE | 1996年 / 96-8卷
关键词：
D O I：
10.1016/0169-4332(95)00430-0
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Time-of-flight mass spectrometric studies were carried out on neutral and positive ion clusters, composed of up to twenty carbon atoms, produced by Nd:YAG laser ablation of graphite in the presence of magnetic fields in the range of 0.03-0.10 T. The growth of larger carbon cluster ions with C-11(+) dominance in the laser-ionized ablation plume of graphite was found to be enhanced by the magnetic fields. We believe that an enhancement of ion-neutral reactions due to an increase of ionic species, resulting from collisional ionization of neutral species through a confinement of electrons, leads to the growth of larger carbon cluster ions.
引用
收藏
页码：261 / 266
页数：6
相关论文
共 16 条
  • [1] A CARBYNE OBSERVED IN A MARKETING MICROGRID
    ANDO, Y
    [J]. CARBON, 1995, 33 (02) : 171 - 175
  • [2] DETECTION OF HC11N IN IRC+10-DEGREES 216
    BELL, MB
    FELDMAN, PA
    KWOK, S
    MATTHEWS, HE
    [J]. NATURE, 1982, 295 (5848) : 389 - 391
  • [3] OBSERVATION OF MAGNETIC-FIELD-ENHANCED EXCITATION AND IONIZATION IN THE PLUME OF KRF-LASER-ABLATED MAGNESIUM
    DIRNBERGER, L
    DYER, PE
    FARRAR, SR
    KEY, PH
    [J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1994, 59 (03): : 311 - 316
  • [4] ELGORESY A, 1968, SCIENCE, V161, P363
  • [5] ENERGETICS FOR CARBON CLUSTERS PRODUCED DIRECTLY BY LASER VAPORIZATION OF GRAPHITE - DEPENDENCE ON LASER POWER AND WAVELENGTH
    GAUMET, JJ
    WAKISAKA, A
    SHIMIZU, Y
    TAMORI, Y
    [J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1993, 89 (11): : 1667 - 1670
  • [6] Hastie J. W., 1988, High Temperatures - High Pressures, V20, P73
  • [7] THE FORMATION OF LONG CARBON CHAIN MOLECULES DURING LASER VAPORIZATION OF GRAPHITE
    HEATH, JR
    ZHANG, Q
    OBRIEN, SC
    CURL, RF
    KROTO, HW
    SMALLEY, RE
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1987, 109 (02) : 359 - 363
  • [8] HEIMANN RB, 1984, CARBON, V22, P147, DOI 10.1016/0008-6223(84)90203-3
  • [9] KASATOCH.VI, 1971, DOKL AKAD NAUK SSSR+, V201, P1104
  • [10] LASER-IONIZATION MASS-SPECTROMETRIC STUDIES ON LASER-ABLATION OF A NITROGEN-RICH POLYMER AT 532 NM AND 1064 NM
    KOKAI, F
    KOGA, Y
    KAKUDATE, Y
    KAWAGUCHI, M
    FUJIWARA, S
    KUBOTA, M
    FUKUDA, K
    [J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1994, 59 (03): : 299 - 304
12