Atomic-scale-deformation-dynamics (ASDS) of nanowires and nanofilms

Ze Zhang, Yuefei Zhang, Kun Zheng, Yonghai Yue, Lihua Wang, Pan Liu, Xiaodong Han

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    Nanowires and nanofilms are fundamental building blocks of micro and nano-electronics for both of bottom-up and top-down technologies. Monitoring and recording the mechanical property dynamics at atomic scale are important to understand the atomic mechanism of new and surprising nano-phenomena and design new applications. Through years' endeavors, we developed tensile and/or bending in-situ atomic-lattice resolution electron microscopy methods and equipments for nanowires and successfully conducted atomic-lattice resolution mechanical tests on individual nano-objects. With this, we observed the brittle materials SiC and Si nanowires (NWs) become highly ductile at room temperature. The crystalline structural evolution processes corresponding to the occurrence of unusual large strain plasticity includes the dislocation initiation, dislocation accumulation and amorphorization as well as the necking of the one dimensional nanowires were fully recorded at atomic scale and in real time. We also expand the experimental methods and equipments to two-dimensional nanofilms. An example of tensile experiment on nano-crystalline Au films is presented. The deformation mechanisms of nano-crystalline gold films were observed at the atomic scale and real-time. At the mean time, an atomic scale the crack blunting behavior was captured and the plastic deformation mechanism of the single nano-crystalline was revealed.

    Original languageEnglish
    Title of host publicationPRICM7
    PublisherTrans Tech Publications Ltd
    Pages1190-1194
    Number of pages5
    ISBN (Print)0878492550, 9780878492558
    DOIs
    Publication statusPublished - 2010 Jan 1
    Event7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7 - Cairns, QLD, Australia
    Duration: 2010 Aug 22010 Aug 6

    Publication series

    NameMaterials Science Forum
    Volume654-656
    ISSN (Print)0255-5476
    ISSN (Electronic)1662-9752

    Other

    Other7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7
    CountryAustralia
    CityCairns, QLD
    Period10/8/210/8/6

    Keywords

    • Atomic-scale
    • Mechanical property
    • Nanofilm
    • Nanowire
    • Transmission electron microscopy

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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