Fe-inserted and shell-shaped carbon nanoparticles by cluster-mediated laser pyrolysis
| Autor: | Florian Dumitrache, Claudiu Fleaca, I. Morjan, Rodica Alexandrescu, Gabriel Prodan, Catalin Luculescu, Ioan Stamatin, S. Birjega, I. Sandu |
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| Rok vydání: | 2012 |
| Předmět: |
Nanostructure
Materials science General Physics and Astronomy Nanoparticle chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Organic chemistry Dehydrogenation Compounds of carbon chemistry.chemical_classification Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films chemistry Polymerization Chemical engineering 0210 nano-technology Pyrolysis Carbon Carbon monoxide |
| Zdroj: | Applied Surface Science |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2012.04.025 |
| Popis: | We report here the high-yield continuous synthesis of carbon nanoparticles with and without Fe content by laser pyrolysis technique. The laser beam decomposes (via C 2 H 4 sensitizer) the Fe(CO) 5 as Fe clusters which absorb themselves the laser radiation. They trigger the fast carbon particles formation by exothermic dehydrogenation/polymerization of the surrounded C 2 H 2 molecules. This combination between Fe clusters and C 2 H 2 generates nanoparticles with unusual structure. Depending on the gas pressure in the reaction chamber, two kinds of nanoparticles were obtained: at lower pressure, 30–40 nm diameter particles with a defective structure, part of them crowded with Fe clusters (3–6 nm) and two types of nanoparticles (around 50–60 nm) at the highest pressure. Some of them have a shell-shape structure, presenting a distinct envelope, other with a turbostratic arrangement, and few containing one or several smaller (3–20 nm) Fe nanoparticles trapped inside. We consider that these particular structures of our nanoparticles may be useful in applications such as MRI applications, drug delivery or catalysts. |
| Databáze: | OpenAIRE |
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