@article{oai:nagoya.repo.nii.ac.jp:00010214,
 author = {Nishikawa, Osamu and Taniguchi, Masahiro and Saito, Yahachi},
 issue = {4},
 journal = {Journal of Vacuum Science and Technology A},
 month = {Jul},
 note = {Six nine purity graphite and single-walled carbon nanotube (SWCNT), double-walled carbonnanotube (DWCNT), multiple-walled carbon nanotube (MWCNT) are mass analyzed by the scanning atom probe. Surface atoms well exposed to the external field are field evaporated and individual evaporated fragment ions are detected. Each specimen exhibits a characteristic massspectrum of fragmented cluster ions. The SWCNT exhibits the cleanest mass spectrum with a smallamount of hydrogen. The commercially available DWCNT shows two types of mass spectra: one isfairly clean and the other with many C_15(H2O)m clusters. The laboratory grown MWCNT showsvarious doubly and triply ionized cluster ions indicating strong bonding between the atoms forming the clusters. The sharper the mass peak is and the higher the multiplicity of charge is, the stronger the binding between atoms forming the clusters. The commercially available pure graphite shows three types of mass spectra, fairly clean spectra without large C–H clusters, spectra with various C–H clusters with a large mass peak of C_28H_4, and spectra with larger clusters such as C_38H_n. The magic number forming the clusters is discussed.},
 pages = {1074--1078},
 title = {Study of characteristic fragmentation of nanocarbon by the scanning atom probe},
 volume = {26},
 year = {2008}
}