Synthesis of self-assembled and hierarchical palladium-CNTs-reduced graphene oxide composites for enhanced field emission properties
| Autor: | Stanislav A. Moshkalev, Rajesh Kumar Singh, Dinesh Pratap Singh, Raja Ram Yadav, Rajesh Kumar, Chandra Sekhar Rout, Alfredo R. Vaz |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Composite number Oxide chemistry.chemical_element Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law lcsh:TA401-492 General Materials Science Graphene oxide paper Graphene Mechanical Engineering 021001 nanoscience & nanotechnology 0104 chemical sciences Field electron emission chemistry Mechanics of Materials lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology Current density Palladium |
| Zdroj: | Materials & Design, Vol 122, Iss, Pp 110-117 (2017) |
| ISSN: | 0264-1275 |
| Popis: | We report the synthesis of palladium-graphene oxide based (Pd-rGO) composite and its enhanced electron field emission studies. The palladium nanoparticles decorated reduced graphene oxide (Pd-NPs-rGO) and Pd catalyst assisted grown CNTs on reduced graphene oxide (Pd-CNTs-rGO) composite have been synthesized employing microwave. The hierarchical Pd-CNTs-rGO composite shows enhanced field emission performance due to the synergestic effect of Pd catalyst assisted grown CNTs on rGO nanosheets (rGO-NSs) and its proper contact on rGO surfaces. The enhanced field emission behavior of Pd-CNTs-rGO composite is attributed to the easy electron tunneling from the one-dimensional CNTs, which increases the emission sites and hence the field emission current density. The Pd-CNTs-rGO composite exhibits lower turn-on field, lower threshold field, larger field enhancement factor and high emission current stability as compared to Pd-NPs-rGO composite. Keywords: Reduced graphene oxide, Pd nanoparticles, Pd-CNTs-rGO composites, Microwave treatment, Field emission properties |
| Databáze: | OpenAIRE |
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