School of Materials Science and Engineering, Beihang University , Beijing 100191, China.
ACS Nano. 2018 Feb 27;12(2):1083-1088. doi: 10.1021/acsnano.7b05877. Epub 2018 Jan 22.
Laser-assisted materials fabrication is an advanced technique that has propelled recent carbon synthesis approaches. Direct laser writing on polyimide or lignocellulose materials by a CO laser has successfully transformed the substrates into hierarchical graphene. However, formation of other carbon allotropes such as diamond and fullerene remains challenging. Here, we report the direct synthesis of fluorinated nanodiamonds or fluorinated graphene by treating polytetrafluoroethylene (Teflon, or PTFE) with a 9.3 μm pulsed CO laser under argon; no exogenous fluorine source is needed. The laser is part of a commercial laser cutting/scribing system that is found in most machine shops. Therefore, it is a readily accessible tool. This discovery could inspire future development for the laser-assisted synthesis of functionalized carbon allotropes.
激光辅助材料制造是一种先进的技术，推动了最近的碳合成方法。通过 CO 激光在聚酰亚胺或木质纤维素材料上进行直接激光写入，成功地将基底转化为分级石墨烯。然而，形成其他碳同素异形体，如金刚石和富勒烯仍然具有挑战性。在这里，我们报告了通过用 9.3 μm 脉冲 CO 激光在氩气下处理聚四氟乙烯（特氟龙或 PTFE），直接合成氟化纳米金刚石或氟化石墨烯，无需外部氟源。该激光是大多数机械车间中常见的商业激光切割/划线系统的一部分。因此，它是一种易于获得的工具。这一发现可能为激光辅助合成功能化碳同素异形体激发未来的发展。
