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Controlling the Amorphous and Crystalline State of Multinary Alloy Nanoparticles in An Ionic Liquid.


ABSTRACT: 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.

SUBMITTER: Garzon-Manjon A 

PROVIDER: S-EPMC6265894 | biostudies-other | 2018 Nov

REPOSITORIES: biostudies-other

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Controlling the Amorphous and Crystalline State of Multinary Alloy Nanoparticles in An Ionic Liquid.

Garzón-Manjón Alba A   Meyer Hajo H   Grochla Dario D   Löffler Tobias T   Schuhmann Wolfgang W   Ludwig Alfred A   Scheu Christina C  

Nanomaterials (Basel, Switzerland) 20181104 11


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 micros  ...[more]

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