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A new carbon material with a unique surface has been created from polytetrafluoroethylene (PTFE) using a combination of ion irradiation and defluorination. In this study, the morphological change in the PTFE surface due to ion irradiation is observed in detail, and the mechanism of needle formation is investigated. At lower irradiation doses, hollows were formed, due to evaporation of PTFE. The number...
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