Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USA.
Nanoscale. 2010 Oct;2(10):2281-5. doi: 10.1039/c0nr00416b. Epub 2010 Aug 16.
The unique properties of graphene and carbon nanotubes made them the most promising nanomaterials attracting enormous attention, due to the prospects for applications in various nanodevices, from nanoelectronics to sensors and energy conversion devices. Here we report on a novel deterministic, single-step approach to simultaneous production and magnetic separation of graphene flakes and carbon nanotubes in an arc discharge by splitting the high-temperature growth and low-temperature separation zones using a non-uniform magnetic field and tailor-designed catalyst alloy, and depositing nanotubes and graphene in different areas. Our results are very relevant to the development of commercially-viable, single-step production of bulk amounts of high-quality graphene.
石墨烯和碳纳米管的独特性质使它们成为最有前途的纳米材料，吸引了人们极大的关注，因为它们有望应用于各种纳米器件，从纳米电子学到传感器和能量转换器件。在这里，我们报告了一种新颖的、确定性的、一步法，通过使用非均匀磁场和定制设计的催化剂合金将高温生长区和低温分离区分开，同时在电弧放电中进行石墨烯薄片和碳纳米管的同时生产和磁性分离，并将纳米管和石墨烯沉积在不同的区域。我们的结果与商业上可行的、一步法批量生产高质量石墨烯的发展非常相关。
