摘要翻译

山东大学

专业英语作业摘要翻译

胡玉婷

201111403

物理学院微电子

2011-12-14

研究方向：超临界二氧化碳制备氧化石墨烯

简介：石墨烯自其发现以来一直受到科学家们的广泛关注，并一直是研究的重点之一。常用的制备方法有热解膨胀剥离法、超声剥离法、静电斥力剥离法、机械剥离法和低温剥离法，但是这些方法都有很多缺点，而超临界二氧化碳作为一种绿色环保的媒介也可用于制备氧化石墨烯。但目前相关方面的研究还很少，我们旨在研究出用超临界二氧化碳制备出高质量高产量的氧化石墨烯。

关键词：graphene oxide, graphite, supercritical fluid

1.Ang, P. K., S. Wang, et al. (2009). "High-throughput synthesis of graphene by

intercalation-exfoliation of graphite oxide and study of ionic screening in graphene transistor." ACS Nano 3(11): 3587-3594.（IF=9.854）

We report a high-throughput method of generating graphene monolayer (>90% yield) from weakly oxidized, poorly dispersed graphite oxide (GO) aggregates. These large-sized GO aggregates consist of multilayer graphite flakes which are oxidized on the outer layers, while the inner layers consist of pristine or mildly oxidized graphene sheets.

Intercalation-exfoliation of these GO aggregates by tetrabutylammonium cations yields large-sized conductive graphene sheets (mean sheet area of 330 +/- 10 microm(2)) with high monolayer yield. Thin-film field-effect transistors made from these graphene sheets exhibit high mobility upon nullifying Coulomb scattering by ionic screening. Ionic screening versus chemical doping effects of different ions such as chloride and fluoride on these graphene films were investigated with a combination of in situ Raman spectroscopy and transport measurement.

题目：通过氧化石墨的插层-剥离的石墨烯高产量合成和石墨烯晶体管离子筛选的研究摘要：报道了一种由弱氧化、低扩散的氧化石墨聚合体生成石墨烯单层的高产量方法。

这些大片的氧化石墨聚合体由外层被氧化的多分子层石墨片构成，而内层由原始的或轻微地被氧化的石墨层构成。通过四丁铵阳离子插层-剥离这些GO聚合体产生大片的导电石墨烯片（平均的片面积是330±10um²）伴有单层的产生。用这些石墨烯片制造的薄膜场效应晶体管通过离子筛选取消库伦散射时表现出高迁移率。结合原位拉曼光谱和输运测量研究了这些石墨烯薄膜上的离子筛选和不同离子氯和氟的化学掺杂效应的对比。

2.Hernandez, Y., V. Nicolosi, et al. (2008). "High-yield production of graphene by liquid-phase

exfoliation of graphite." Nature Nanotechnology 3(9): 563-568.（IF=30.3）

Fully exploiting the properties of graphene will require a method for the mass production of this remarkable material. Two main routes are possible: large-scale growth or large-scale exfoliation. Here, we demonstrate graphene dispersions with concentrations up to similar to 0.01 mg ml(-1), produced by dispersion and exfoliation of graphite in organic solvents such as N-methyl-pyrrolidone. This is possible because the energy required to exfoliate graphene is balanced by the solvent-graphene interaction for solvents whose surface energies match that of graphene. We confirm the presence of individual graphene sheets by Raman spectroscopy, transmission electron microscopy and electron diffraction.

Our method results in a monolayer yield of similar to 1 wt%, which could potentially be