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Jpn. J. Appl. Phys. 49 (2010) 105104 (5 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Ion Desorption from Single-Walled Carbon Nanotubes Induced by Soft X-ray Illumination

Yutaka Mera, Takayuki Fujiwara, Kiichiro Ishizaki, Rong Xiang1, Junichiro Shiomi1, Shigeo Maruyama1, Takuhiro Kakiuchi2, Kazuhiko Mase2,3, and Koji Maeda

Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
1Department of Mechanical Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
2The Graduate University for Advanced Studies, Tsukuba, Ibaraki 305-0801, Japan
3Institute of Materials Structure Science, KEK, Tsukuba, Ibaraki 305-0801, Japan

(Received April 30, 2010; revised June 25, 2010; accepted July 19, 2010; published online October 20, 2010)

We have investigated ion desorption from single-walled carbon nanotubes (SWNTs) that is induced by soft X-ray illumination in the C 1s core-excitation energy range in order to have insight to the mechanism of defect formation caused by the similar excitation. The mass of desorbed ions was analyzed by a time-of-flight (TOF) spectrometer and the photon energy dependence of the ion yield or the desorption efficiency spectra were measured as a function of the monochromatic photon energy used for illumination. Experimental results exclude the simple detachment of carbon atoms constituting the nanotubes from the cause of the defect formation. Also the photo-induced etching of carbon atoms associated with C–H bond rupture is ruled out from the defect formation mechanism. Auger mechanisms to explain the photo-induced desorption are discussed.

URL: http://jjap.jsap.jp/link?JJAP/49/105104/
DOI: 10.1143/JJAP.49.105104


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