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luoxinfire金蟲 (正式寫手)
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20121019[Nature Nanotechnology]最新石墨烯文章(含補充資料及endnote索引文件) 已有6人參與
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Nature Nanotechnology | Letter Voltage-dependent conductance of a single graphene nanoribbon Nature Nanotechnology. doi:10.1038/nnano.2012.169 Authors: Matthias Koch, Francisco Ample, Christian Joachim & Leonhard Grill Graphene nanoribbons could potentially be used to create molecular wires with tailored conductance properties. However, understanding charge transport through a single molecule requires length-dependent conductance measurements and a systematic variation of the electrode potentials relative to the electronic states of the molecule1, 2. Here, we show that the conductance properties of a single molecule can be correlated with its electronic states. Using a scanning tunnelling microscope, the electronic structure of a long and narrow graphene nanoribbon, which is adsorbed on a Au(111) surface, is spatially mapped and its conductance then measured by lifting the molecule off the surface with the tip of the microscope. The tunnelling decay length is measured over a wide range of bias voltages, from the localized Tamm states over the gap up to the delocalized occupied and unoccupied electronic states of the nanoribbon. We also show how the conductance depends on the precise atomic structure and bending of the molecule in the junction, illustrating the importance of the edge states and a planar geometry. http://www.nature.com/nnano/jour ... nnano.2012.169.html |
先進材料 | 科研資料 | 石墨烯制備及應用 |

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木蟲 (初入文壇)

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