论文标题
通过化学门控氨基诱导的石墨烯纳米纤维的带状人口减少
Band Depopulation of Graphene Nanoribbons Induced by Chemical Gating with Amino Groups
论文作者
论文摘要
石墨烯纳米纤维（GNR）的电子特性可以通过化学掺杂精确调节。在这里，我们证明在手性GNRS（CHGNRS）边缘附加的氨基（NH $ _2 $）官能团可以有效地登机，并导致金属表面上的价带（VB）减小。 NH $ _2 $掺杂的CHGNR是通过使用功能化的双雄性前体在AU（111）上的表面合成生长的。扫描隧道光谱扫描表明，NH $ _2 $组会大大换档CHGNR的频段，从而导致CHGNRS VB发作的费米水平交叉。通过密度函数理论模拟，我们确认孔掺杂行为是由于边缘NH $ _2 $组引起的频段的向上移动。
The electronic properties of graphene nanoribbons (GNRs) can be precisely tuned by chemical doping. Here we demonstrate that amino (NH$_2$) functional groups attached at the edges of chiral GNRs (chGNRs) can efficiently gate the chGNRs and lead to the valence band (VB) depopulation on a metallic surface. The NH$_2$-doped chGNRs are grown by on-surface synthesis on Au(111) using functionalized bianthracene precursors. Scanning tunneling spectroscopy resolves that the NH$_2$ groups significantly up-shift the bands of chGNRs, causing the Fermi level crossing of the VB onset of chGNRs. Through density functional theory simulations we confirm that the hole-doping behavior is due to an upward shift of the bands induced by the edge NH$_2$ groups.
