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A two-step process for making graphene

By Paul Grad |

A Korean team has developed a carbon material that is as effective as graphene in applications, such as solar cells and semiconductor chips, using a process that requires only two steps instead of the usual eight. High-quality graphene is usually manufactured using chemical vapor deposition (CVD). In this method the graphene is manufactured on the board of a metal film that serves as a catalyst. The graphene is made by blowing out a gas called the source gas onto the board. The metal must be subsequently removed and the graphene has to be transported to another board. This method is therefore labor intensive, and there is usually a degradation of the quality of the graphene, with the appearance of wrinkles and cracks. The Korean team, led by Han-Ik Joh of the Korea Institute of Science and Technology (KIST, Seoul; eng.kist.re.kr), Seok-In Na of Chonbuk National University (Jeonju; www.chonbuk.ac.kr), and Byoung Gak Kim of the Korean Research Institute of Chemical Technology (KRICT, Daejeon; www.krict.re.kr) has developed a carbon nanosheet in a two-step process consisting of coating the substrate with a polymer solution and heating it. The team synthesized a polymer with a rigid ladder structure PIM-1 (polymer of intrinsic microporosity-1)…
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