Slimani, Ahmed

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Name
Slimani, Ahmed
Main Affiliation
Email
ahmed.slimani@sorbonne.ae
ORCID
0000-0002-4303-4169
Scopus Author ID
37018768400
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Currently affiliated

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  • Publication
    Ultrafast, Light, Soft Martensitic Materials
    (2022)
    Slimani, Ahmed 
    ;
    Ejaz Ahmed
    ;
    Durga Prasad Karothu
    ;
    Jad Mahmoud Halabi
    ;
    Ibrahim Tahir
    ;
    Kevin Quirós Canales
    ;
    Panče Naumov
    Martensitic transformations are well documented in metals and alloys where the atoms connected via metallic bonds rearrange concertedly and rapidly; however, due to the metal atoms, these materials are inherently very dense and add significant weight and bulkiness to actuating devices. Here, remarkably rapid lattice switching of molecular martensitic materials is reported where the rate of structural transformation exceeds other phase transitions several orders of magnitude. With a determined speed in the range of 0.3–0.6 m s−1, the new phase advances throughout the crystal about ten thousand times faster relative to spin-crossover transitions, and about hundred to hundred thousand times faster than other common structural phase transitions. Macroscopic crystals of these materials respond by rapid expansion or contraction of about 0.02 m s−1 for unrestrained crystals and 0.02–0.03 m s−1 for clamped crystals. Monte–Carlo simulation of the spatiotemporal profile of the transition and of the local distribution of elastic and kinetic energies induced by domain growth reveals the critical role of the dynamic phase boundary and the lattice edges in the structure switching. Within a broader context, this study indicates that the martensitic organic crystals are prospective lightweight substitutes of metals for ultrafast and clean energy transduction.
    Scopus© Citations 11  43  3