Chemisorption of silicon cluster ions (Sin +, n=10-30) with ethylene (C2H4) by using FT-ICR mass spectrometer

Masamichi Kohno, Shuhei Inoue, Shigeo Maruyama

Research output: Contribution to journalArticle

Abstract

Mass-selected silicon cluster ions were levitated in a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer and monitored during chemisorption reaction with ethylene (C2H4). Through measurements of "time-dependency" of this reaction process, large change of the reactivity depending on the number of absorbed ethylene was observed, in addition to the strong dependency to silicon cluster size. From Si15 + to Si18 + shows a special stability of SixEy + when x + y = 19, such as Si15E4 +. The large decrease in the reactivity of Sin + was observed due to the contamination of hydrogen atom to Sin +. Rate constants for the adsorption of the first C2H4 molecules on Sin + were estimated. The reaction kinetics data suggest that structural isomers are present for all clusters except Si14 + in the size range investigated.

Original languageEnglish
Pages (from-to)1148-1154
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume71
Issue number704
DOIs
Publication statusPublished - Jan 1 2005
Externally publishedYes

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Cyclotron resonance
Mass spectrometers
Chemisorption
cyclotron resonance
chemisorption
mass spectrometers
Fourier transforms
Ethylene
ethylene
Silicon
Ions
silicon
reactivity
Reaction kinetics
Isomers
Rate constants
ions
Contamination
Adsorption
Atoms

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

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abstract = "Mass-selected silicon cluster ions were levitated in a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer and monitored during chemisorption reaction with ethylene (C2H4). Through measurements of {"}time-dependency{"} of this reaction process, large change of the reactivity depending on the number of absorbed ethylene was observed, in addition to the strong dependency to silicon cluster size. From Si15 + to Si18 + shows a special stability of SixEy + when x + y = 19, such as Si15E4 +. The large decrease in the reactivity of Sin + was observed due to the contamination of hydrogen atom to Sin +. Rate constants for the adsorption of the first C2H4 molecules on Sin + were estimated. The reaction kinetics data suggest that structural isomers are present for all clusters except Si14 + in the size range investigated.",
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