TY - JOUR
T1 - Charge transfer from I2- (CO2)n cluster anion to silicon surface
T2 - Cluster-size dependence
AU - Yasumatsu, Hisato
AU - Terasakia, Akira
AU - Kondow, Tamotsu
N1 - Funding Information:
We acknowledge to Professor J. Jortner and Professor R.D. Levine for providing illuminating theoretical discussion. Thanks are also due to Dr H. Okano, Dr N. Hayasaka and Dr M. Nagamine (Research and Develop Center, Toshiba Corp.) for providing the silicon wafers used in the present study and their technical advice on the surface preparation. This research was supported by Research on Microclusters (RIKEN) and a Grant-in-Aid for Encouragement of Young Scientists from the Ministry of Education, Science and Culture. One of the authors, H.Y., was supported by Special Postdoctoral Researchers Program of RIKEN.
PY - 1998
Y1 - 1998
N2 - The charge survival yield for a cluster anion, I2- (CO2)n (n = 0-30) during its collision onto a silicon surface covered with silicon oxide layers of ∼2 nm in thickness was measured as a function of the number of the CO2 molecules, n, and the collision energy (per I2-) in the range of 1-80 eV. A monotonic increase in the charge survival yield with n was observed. This means that the efficiency of the charge transfer from the core ion, I2-, to the surface is reduced with the increase of n. It was concluded that the CO2 molecules suppress the charge transfer by behaving as an electrostatic 'stabilizer' of the core ion and as a 'spacer' between the core ion and the surface.
AB - The charge survival yield for a cluster anion, I2- (CO2)n (n = 0-30) during its collision onto a silicon surface covered with silicon oxide layers of ∼2 nm in thickness was measured as a function of the number of the CO2 molecules, n, and the collision energy (per I2-) in the range of 1-80 eV. A monotonic increase in the charge survival yield with n was observed. This means that the efficiency of the charge transfer from the core ion, I2-, to the surface is reduced with the increase of n. It was concluded that the CO2 molecules suppress the charge transfer by behaving as an electrostatic 'stabilizer' of the core ion and as a 'spacer' between the core ion and the surface.
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U2 - 10.1016/s0168-1176(97)00309-1
DO - 10.1016/s0168-1176(97)00309-1
M3 - Article
AN - SCOPUS:0000304270
SN - 1387-3806
VL - 174
SP - 297
EP - 303
JO - International Journal of Mass Spectrometry and Ion Processes
JF - International Journal of Mass Spectrometry and Ion Processes
IS - 1-3
ER -