Molecular ion emission from single large cluster impacts

被引：18

作者：

Verkhoturov, S. V. ^{[1
]}

Rickman, R. D. ^{[1
]}

Guillemier, C. ^{[1
]}

Hager, G. J. ^{[1
]}

Locklear, J. E. ^{[1
]}

Schweikert, E. A. ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Chem, College Stn, TX 77842 USA

来源：

APPLIED SURFACE SCIENCE | 2006年 / 252卷 / 19期

基金：

美国国家科学基金会;

关键词：

gold clusters; secondary ion mass spectrometry; intact molecules; multi-ion emission; C-60;

D O I：

10.1016/j.apsusc.2006.02.196

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：

We investigated the emission of the secondary ions stimulated by single impacts of 136 keV Au-400(4+) projectiles. The study was carried out on targets of glycine, phenylalanine, and C-60. In addition, a target of C-60 was examined with 18 keV C-60(+) projectiles. The experiments were performed in the event-by-event bombardment/detection mode. The secondary ions were identified with linear time-of-flight mass spectrometer equipped with an 8-anode detector. The Au-400(4+) projectile induces abundant multi-ion emission, for instance the average number of detected ions (atomic, fragment, molecular and cluster ions) emitted per event from glycine target is 12.5. The glycine intact molecular ion (Gly(-)) yield is 1.14. The bombardment of a C-60 target results in the efficient emission of multiple intact C-60(-) (total yield is 0.15). (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：6490 / 6493

页数：4

共 10 条

[1] Heavy gold cluster beams production and identification [J].

Bouneau, S ;

Della-Negra, S ;

Depauw, J ;

Jacquet, D ;

Le Beyec, Y ;

Mouffron, JP ;

Novikov, A ;

Pautrat, M .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2004, 225 (04) :579-589

[2] SECONDARY-ION EMISSION FROM CLEAN AND OXYGEN-COVERED BERYLLIUM SURFACES .2. ENERGY-DEPENDENCE [J].

KRAUSS, AR ;

GRUEN, DM .

SURFACE SCIENCE, 1980, 92 (01) :14-28

[3]

LI Z, UNPUB ANAL CHEM

[4] Enhancement of sputtering yields due to C60 versus Ga bombardment of Ag{111} as explored by molecular dynamics simulations [J].

Postawa, Z ;

Czerwinski, B ;

Szewczyk, M ;

Smiley, EJ ;

Winograd, N ;

Garrison, BJ .

ANALYTICAL CHEMISTRY, 2003, 75 (17) :4402-4407

[5] Multi-ion emission from large and massive keV cluster impacts [J].

Rickman, RD ;

Verkhoturov, SV ;

Hager, GJ ;

Schweikert, EA .

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 2005, 245 (1-3) :48-52

[6] Characterization of surface structure by cluster coincidental ion mass spectrometry [J].

Rickman, RD ;

Verkhoturov, SV ;

Balderas, S ;

Bestaoui, N ;

Clearfield, A ;

Schweikert, EA .

APPLIED SURFACE SCIENCE, 2004, 231 :106-112

[7] Simultaneous ejection of two molecular ions from keV gold atomic and polyatomic projectile impacts [J].

Rickman, RD ;

Verkhoturov, SV ;

Parilis, ES ;

Schweikert, EA .

PHYSICAL REVIEW LETTERS, 2004, 92 (04) :4-476014

[8] Multiple secondary ion emission from keV massive gold projectile impacts [J].

Verkhoturov, SV ;

Hager, GJ ;

Schweikert, EA ;

Bennett, JA .

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 2005, 241 (01) :57-61

[9] BOND BREAKING AND THE IONIZATION OF SPUTTERED ATOMS [J].

YU, ML ;

MANN, K .

PHYSICAL REVIEW LETTERS, 1986, 57 (12) :1476-1479

[10]

YU ML, 1991, TOP APPL PHYS, V64, P91

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