给石墨烯引入带隙的方法之一是制作极窄的石墨烯带。
One way of introducing a bandgap into graphene is to make extremely narrow ribbons of the material.
这些方法得到的石墨烯带都比较宽(超过10nm)，而且边缘粗糙。
Such methods produce ribbons that are relatively wide (more than 10 nm across) with rough edges.
这种石墨烯带还拥有平滑的边缘，而这是制造基于石墨烯的电子器件的关键。
The ribbons also have smooth edges, something that is crucial for making electronic devices out of graphene.
通过用两个适合的单体连结三个分立的石墨烯带，Fasel和他的同事展示了这种技术的可行性。
Fasel and colleagues have already shown that this technique is viable by connecting three separate graphene ribbons together using two suitable monomers.
在这项研究中，研究人员把两种药物——抗癌蛋白trail和阿霉素(强力霉素)——连接到石墨烯带。
In this study, the researchers attached two drugs - TRAIL and doxorubicin (dox) - onto graphene strips.
而以上并非全部：这种石墨烯带的边缘是椅型的，很平滑；取决于使用的单体，其本身可以是笔直或锯齿状的。
And that is not all: the edges of the graphene ribbons are smooth and armchair-shaped, and the ribbons themselves are either straight or zigzagged, depending on the monomers used to make them.
目前为止，石墨烯带的制作都是通过自顶向下的方法，如用激光从大片石墨烯层上“剪”出带状或是“剖”开碳纳米管。
Until now, these graphene nanoribbons were made using top-down approaches, such as "cutting" the ribbons from larger graphene sheets or "unzipping" carbon nanotubes.
然而，与半导体硅不同，石墨烯的价带和导带之间没有带隙。
However, unlike the semiconductor silicon, graphene has no gap between its valence and conduction bands.
直至目前，这以前的方法获得的石墨烯纳米带都是粗糙边缘以至于很难研究。
Until now, previous methods to make graphene nanoribbons always produced rough edges that were difficult to study.
如果把双层石墨烯加工成细线（纳米带）状，带隙还能进一步扩大。
If the double-layer Graphene processed into light-weight (nanobelts), band-gap can further increased.
由于石墨烯纳米带在实际应用中需要不同的带隙，我们讨论了石墨烯纳米带在形变条件下的电子能带结构。
We discuss the electronic structures of the deformed graphene nanoribbons, because we need the different energy gap when we put the graphene nanoribbons into the application.
本文先介绍了石墨烯相关物理特性和石墨烯纳米带几何结构以及研究石墨烯纳米带的基本方法。
In the thesis, we introduce the graphene physics properties, geometry structure and the basic study methods of graphene nanoribbons.
通过在带正电荷的Co3O 4周围包裹一大层带负电荷的石墨烯，可以为高性能锂离子电池制备出一个非常有效率的阳极。
Wrapping a large sheet of negatively charged df-G around a positively charged Co3O4creates a very promising anode for high-performance Li-ion batteries.
通过在带正电荷的Co3O 4周围包裹一大层带负电荷的石墨烯，可以为高性能锂离子电池制备出一个非常有效率的阳极。
Wrapping a large sheet of negatively charged df-G around a positively charged Co3O4creates a very promising anode for high-performance Li-ion batteries.
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