Controlling the Amorphous and Crystalline State of Multinary Alloy Nanoparticles in An Ionic Liquid
| Autor: | Alba Garzón-Manjón, Hajo Meyer, Dario Grochla, Tobias Löffler, Wolfgang Schuhmann, Alfred Ludwig, Christina Scheu |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Nanomaterials, Vol 8, Iss 11, p 903 (2018) |
| Druh dokumentu: | article |
| ISSN: | 2079-4991 47439521 |
| DOI: | 10.3390/nano8110903 |
| Popis: | Controlling the amorphous or crystalline state of multinary Cr-Mn-Fe-Co-Ni alloy nanoparticles with sizes in the range between ~1.7 nm and ~4.8 nm is achieved using three processing routes. Direct current sputtering from an alloy target in the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide leads to amorphous nanoparticles as observed by high-resolution transmission electron microscopy. Crystalline nanoparticles can be achieved in situ in a transmission electron microscope by exposure to an electron beam, ex situ by heating in vacuum, or directly during synthesis by using a high-power impulse magnetron sputtering process. Growth of the nanoparticles with respect to the amorphous particles was observed. Furthermore, the crystal structure can be manipulated by the processing conditions. For example, a body-centered cubic structure is formed during in situ electron beam crystallization while longer ex situ annealing induces a face-centered cubic structure. |
| Databáze: | Directory of Open Access Journals |
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