Nanotomy-based production of transferable and dispersible graphene nanostructures of controlled shape and size
Nanotomy-based production of transferable and dispersible graphene nanostructures of controlled shape and size
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DOI：
10.1038/ncomms1834
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发表时间：
2012-05-01
影响因子：
16.6
通讯作者：
Berry, Vikas
中科院分区：
文献类型：
--
作者：
Mohanty, Nihar;Moore, David;Berry, Vikas
由于边缘态和量子限制，石墨烯纳米结构的形状和大小决定了它们的电学、光学、磁性和化学性质。目前石墨烯纳米结构的合成方法不能生产大量易于转移到不同基质/溶剂的石墨烯纳米结构，不能生产不同形状和可控形状的石墨烯纳米结构，或者不能在大范围内（高达100纳米）控制石墨烯纳米结构的尺寸。在这里，我们报告了具有预定形状（正方形，矩形，三角形和带状）和控制尺寸的石墨烯纳米结构的生产。这是通过金刚石边缘诱导的纳米切割（纳米级切割）将石墨切割成石墨纳米块，然后将其剥离来实现的。结果表明，制备的石墨烯纳米结构的边缘直线且相对光滑，I-D/I-G值为0.22-0.28，具有粗糙度
Because of the edge states and quantum confinement, the shape and size of graphene nanostructures dictate their electrical, optical, magnetic and chemical properties. The current synthesis methods for graphene nanostructures do not produce large quantities of graphene nanostructures that are easily transferable to different substrates/solvents, do not produce graphene nanostructures of different and controlled shapes, or do not allow control of GN dimensions over a wide range (up to 100 nm). Here we report the production of graphene nanostructures with predetermined shapes (square, rectangle, triangle and ribbon) and controlled dimensions. This is achieved by diamond-edge-induced nanotomy (nanoscale-cutting) of graphite into graphite nanoblocks, which are then exfoliated. Our results show that the edges of the produced graphene nanostructures are straight and relatively smooth with an I-D/I-G of 0.22-0.28 and roughness