石墨烯的可逆氟化:二维宽禁带半导体
Reversible Fluorination of Graphene: towards a Two-Dimensional Wide Bandgap Semiconductor
摘要:
我们报告了石墨烯氟化物的合成和证据,石墨烯是一种二维宽带隙半导体。氟化石墨烯表现出六方晶序和强绝缘行为,在室温下电阻超过10 G $Ω$。氟化石墨烯中的电子输运通过由于带隙中的局域态的存在而在二维中的可变范围跳跃来很好地描述。通过还原氟化石墨烯获得的石墨烯是高度导电的,在室温下表现出小于100 k $Ω$的电阻率。我们的方法提供了一种新的途径,可逆工程的能带结构和导电性的石墨烯的电子和光学应用。
英文摘要:
We report the synthesis and evidence of graphene fluoride, a two-dimensional wide bandgap semiconductor derived from graphene. Graphene fluoride exhibits hexagonal crystalline order and strongly insulating behavior with resistance exceeding 10 G$Ω$ at room temperature. Electron transport in graphene fluoride is well described by variable-range hopping in two dimensions due to the presence of localized states in the band gap. Graphene obtained through the reduction of graphene fluoride is highly conductive, exhibiting a resistivity of less than 100 k$Ω$ at room temperature. Our approach provides a new path to reversibly engineer the band structure and conductivity of graphene for electronic and optical applications.
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