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http://hdl.handle.net/1843/57610| Type: | Artigo de Periódico |
| Title: | Single step vacuum-free and hydrogen-free synthesis of graphene |
| Authors: | Christian Antonio Orellana Gómez Thiago Henrique Rodrigues da Cunha Cristiano Fantini Leite Alonso Jaques Patricio Häberle Tapia |
| Abstract: | We report a modified method to grow graphene in a single-step process. It is based on chemical vapor deposition and considers the use of methane under extremely adverse synthesis conditions, namely in an open chamber without requiring the addition of gaseous hydrogen in any of the synthesis stages. The synthesis occurs between two parallel Cu plates, heated up via electromagnetic induction. The inductive heating yields a strong thermal gradient between the catalytic substrates and the surrounding environment, promoting the enrichment of hydrogen generated as fragments of the methane molecules within the volume confined by the Cu foils. This induced density gradient is due to thermo-diffusion, also known as the Soret effect. Hydrogen and other low mass molecular fractions produced during the process inhibit oxidative effects and simultaneously reduce the native oxide on the Cu surface. As a result, high quality graphene is obtained on the inner surfaces of the Cu sheets as confirmed by Raman spectroscopy. |
| Subject: | Grafeno |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Aberto |
| metadata.dc.identifier.doi: | http://dx.doi.org/10.1063/1.4985751 |
| URI: | http://hdl.handle.net/1843/57610 |
| Issue Date: | 2017 |
| metadata.dc.url.externa: | https://pubs.aip.org/aip/adv/article/7/8/085301/955776/Single-step-vacuum-free-and-hydrogen-free |
| metadata.dc.relation.ispartof: | AIP Advances |
| Appears in Collections: | Artigo de Periódico |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Single step vacuum-free and hydrogen-free synthesis of.pdf | 7.92 MB | Adobe PDF | View/Open |
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