Plasma gun sprays out high-quality grapheneThe fast, low-cost method splits graphite particles into graphene flakes, showing promise for mass productionby Prachi Patel, special to C&EN
FEBRUARY 12, 2021
Graphene has slowly made its way into sports gear, anticorrosion coatings, and even fabric face masks. But widespread use of the strong, conductive material in electronics, energy storage, and medical devices hinges on making high-quality graphene affordably and at large scale. Researchers now report an ultrafast way to peel graphene flakes a few atoms thick from graphite using a high-temperature plasma spray process (ACS Nano 2021, DOI: 10.1021/acsnano.0c09451).
The winners of the 2010 Nobel Prize in Physics first lifted monolayers of carbon atoms from graphite, the stuff of pencil lead, using ordinary sticky tape. That slow, painstaking method gives the highest quality graphene. Other exfoliation techniques yield very small amounts of graphene, and the material can have defects. Chemical vapor deposition (CVD), which grows materials from the bottom up, is now the leading method to make large amounts of graphene. But it requires multiple steps and remains expensive. con't....
https://cen.acs.org/materials/nanomaterials/Plasma-gun-sprays-high-quality/99/web/2021/02?fbclid=IwAR1hldeDWD4J3dmzauVrs2JFra7hBJF83OWmwiL-x8Y8KY4w0Gg6HRaxUkQ
|
