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    Structural and Chemical Analysis of Gadolinium Halides Encapsulated within WS 2 Nanotubes

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    Type
    Article
    Authors
    Anumol, E A
    Enyashin, Andrey
    Batra, Nitin M cc
    Da Costa, Pedro M. F. J. cc
    Francis, Leonard Deepak
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2016
    Permanent link to this record
    http://hdl.handle.net/10754/611203
    
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    Abstract
    The hollow cavities of nanotubes could serve as templates for the growth of size- and shape-confined functional nanostructures, giving rise to novel materials and properties. In this work, considering their potential application as MRI contrast agents, gadolinium halides are encapsulated within the hollow cavities of inorganic nanotubes of WS2 by capillary filling to obtain GdX3@WS2 nanotubes (where X = Cl, Br or I and @ means encapsulated in). Aberration corrected scanning/transmission electron microscopy (S/TEM) and spectroscopy is employed to understand the morphology and composition of the GdI3@WS2 nanotubes. The three dimensional morphology is studied with STEM tomography but understanding the compositional information is a non-trivial matter due to the presence of multiple high atomic number elements. Therefore, energy dispersive X-ray spectroscopy (EDS) tomography was employed revealing the three dimensional chemical composition. Molecular dynamics simulations of the filling procedure shed light into the mechanics behind the formation of the confined gadolinium halide crystals. The quasi-1D system employed here serves as an example of a TEM-based chemical nanotomography method that could be extended to other materials, including beam-sensitive soft materials.
    Citation
    Structural and Chemical Analysis of Gadolinium Halides Encapsulated within WS 2 Nanotubes 2016 Nanoscale
    Sponsors
    The authors would like to thank Prof. Reshef Tenne (WIS) and Dr. Alla Zak (HIT) for providing the WS2 nanotubes. The authors thank Dr. Manuel Banobre-Lopez for help with the filling of the ampoules. FLD and EAA acknowledge the financial support provided by the ERDF (ON.2 - O Novo Norte Program). ANE acknowledges the support by Act 211 Government of the Russian Federation, contract №. 02.A03.21.0006. NMB and PMFJC acknowledge funding from KAUST.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Nanoscale
    DOI
    10.1039/C6NR02710E
    PubMed ID
    27250645
    Additional Links
    http://pubs.rsc.org/en/Content/ArticleLanding/2016/NR/C6NR02710E
    ae974a485f413a2113503eed53cd6c53
    10.1039/C6NR02710E
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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