J. W. ChiouL. C. Chen2020-06-202020-06-20200200036951https://scholars.lib.ntu.edu.tw/handle/123456789/503926Electronic Structure of the Carbon Nanotube Tips Studied by X-ray-absorption Spectroscopy and Scanning Photoelectron Microscopyjournal articlehttps://doi.org/10.1063/1.1523152