自支撑化学修饰石墨烯的结构和形貌
On the structure and topography of free-standing chemically modified graphene
摘要：
化学改性石墨烯（CMG）的机械、电学和化学性质与其结构有着内在的联系。在这里，我们报告我们的研究的地形结构的独立CMG使用原子力显微镜和电子衍射。我们发现，与石墨烯不同，CMG的悬浮片在纳米尺度上是波纹状和扭曲的。AFM不仅揭示了长范围（100 nm）的扭曲诱导的支持，如先前观察到的石墨烯，但也短范围的波纹长度尺度下降到10 nm的分辨率极限。这些波纹是静态的而不是动态的，并且在原子级光滑衬底上支撑的CMG上显著减小。证据，甚至更短的范围内的扭曲，下降到几个纳米或更少，被发现的电子衍射悬浮CMG。实验数据与模拟的比较表明，从名义晶格位置的平均原子位移是碳-碳键长的10%的顺序。总之，这些结果表明化学改性石墨烯的复杂结构，其中异质官能化产生局部应变和变形。
英文摘要：
The mechanical, electrical and chemical properties of chemically modified graphene (CMG) are intrinsically linked to its structure. Here we report on our study of the topographic structure of free-standing CMG using atomic force microscopy and electron diffraction. We find that, unlike graphene, suspended sheets of CMG are corrugated and distorted on nanometre length scales. AFM reveals not only long range (100 nm) distortions induced by the support, as previously observed for graphene, but also short-range corrugations with length scales down to the resolution limit of 10 nm. These corrugations are static not dynamic, and are significantly diminished on CMG supported on atomically smooth substrates. Evidence for even shorter range distortions, down to a few nanometres or less, is found by electron diffraction of suspended CMG. Comparison of the experimental data with simulations reveals that the mean atomic displacement from the nominal lattice position is of order 10% of the carbon-carbon bond length. Taken together, these results suggest a complex structure for chemically modified graphene where heterogeneous functionalisation creates local strain and distortion.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
