Preparation of graphene on Cu foils by ion implantation with negative carbon clusters<xref ref-type="fn" rid="cpb141100fn1">*</xref>

Preparation of graphene on Cu foils by ion implantation with negative carbon clusters*

Li Hui, Shang Yan-Xia, Zhang Zao-Di, Wang Ze-Song, Zhang Rui, Fu De-Jun†

Fig.#cod#x00A0;3. Raman spectra of graphene on Cu foils prepared by ion implantation with C 4 clusters to doses 4#cod#x00D7;10 15 and 8#cod#x00D7;10 15 #cod#x00A0;atomscm 2 . The energy is 20#cod#x00A0;keV per cluster.