Direct growth of single-layer terminated vertical graphene array on germanium by plasma enhanced chemical vapor deposition
| Autor: | Mariam Ali Almahri, Srinivasa Reddy Tamalampudi, Amal Al Ghaferi, Karen Sloyan, Shan Cong, Abdulrahman Al-Hagri, Nitul S. Rajput, Ru Li, Matteo Chiesa, Jin-You Lu |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
chemistry.chemical_element Germanium 02 engineering and technology Chemical vapor deposition Substrate (electronics) 010402 general chemistry 01 natural sciences law.invention symbols.namesake Plasma-enhanced chemical vapor deposition law General Materials Science Nanosheet business.industry Graphene General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences VDP::Technology: 500::Nanotechnology: 630 chemistry symbols Optoelectronics Chemical stability 0210 nano-technology business Raman spectroscopy VDP::Teknologi: 500::Nanoteknologi: 630 |
| Popis: | Vertically aligned graphene nanosheet arrays (VAGNAs) exhibit large surface area, excellent electron transport properties, outstanding mechanical strength, high chemical stability, and enhanced electrochemical activity, which makes them highly promising for application in supercapacitors, batteries, fuel cell catalysts, etc. It is shown that VAGNAs terminated with a high-quality single-layer graphene sheet, can be directly grown on germanium by plasma-enhanced chemical vapor deposition without an additional catalyst at low temperature, which is confirmed by high-resolution transmission electron microscopy and large-scale Raman mapping. The uniform, centimeter-scale VAGNAs can be used as a surface-enhanced Raman spectroscopy substrate providing evidence of enhanced sensitivity for rhodamine detection down to 1 × 10−6 mol L−1 due to the existed abundant single-layer graphene edges. |
| Databáze: | OpenAIRE |
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