Graphene, with its unique band structure, mechanical stability, and high charge mobility, holds great promise for next-generation electronics. Nevertheless, its zero bandgap challenges the control of current flow through electrical gating, consequently limiting its practical applications. Recent research indicates that atomic oxygen can oxidize epitaxial graphene in a vacuum without causing unwanted damage. In this study, we have investigated the effects of chemisorbed atomic oxygen on the electronic properties of epitaxial graphene using scanning tunneling microscopy (STM). Our findings reveal that oxygen atoms effectively modify the electronic states of graphene, resulting in a bandgap at its Dirac point. Furthermore, we demonstrate that it is possible to selectively induce desorption or hopping of oxygen atoms with atomic precision by applying appropriate bias sweeps with an STM tip. These results suggest the potential for atomic-scale tailoring of graphene oxide, enabling the development of graphene-based atomic-scale electronic devices.
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Anhui Polytech Univ, Sch Text & Garment, Wuhu 241000, Anhui, Peoples R ChinaAnhui Polytech Univ, Sch Text & Garment, Wuhu 241000, Anhui, Peoples R China
Zheng, Xianhong
Hu, Qiaole
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Anhui Polytech Univ, Sch Text & Garment, Wuhu 241000, Anhui, Peoples R China
Anhui Polytechinc Univ, Anhui Prov Int Cooperat Res Ctr Text Struct Compo, Wuhu 241000, Peoples R ChinaAnhui Polytech Univ, Sch Text & Garment, Wuhu 241000, Anhui, Peoples R China
Hu, Qiaole
Zhou, Xiaoshuang
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Jiangsu Univ, Inst Intelligent Flexible Mechatron, Zhenjiang 212013, Jiangsu, Peoples R ChinaAnhui Polytech Univ, Sch Text & Garment, Wuhu 241000, Anhui, Peoples R China
Zhou, Xiaoshuang
Nie, Wenqi
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Anhui Polytech Univ, Sch Text & Garment, Wuhu 241000, Anhui, Peoples R ChinaAnhui Polytech Univ, Sch Text & Garment, Wuhu 241000, Anhui, Peoples R China
Nie, Wenqi
Li, Changlong
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Anhui Polytech Univ, Sch Text & Garment, Wuhu 241000, Anhui, Peoples R ChinaAnhui Polytech Univ, Sch Text & Garment, Wuhu 241000, Anhui, Peoples R China
Li, Changlong
Yuan, Ningyi
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Changzhou Univ, Jiangsu Collaborat Innovat Ctr Photovolta Sci & E, Changzhou 213164, Peoples R ChinaAnhui Polytech Univ, Sch Text & Garment, Wuhu 241000, Anhui, Peoples R China