Počet záznamů: 1  

Morphological changes in carbon nanohorns under stress: a combined Raman spectroscopy and TEM study

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    SYSNO ASEP0472533
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevMorphological changes in carbon nanohorns under stress: a combined Raman spectroscopy and TEM study
    Tvůrce(i) Peňa-Alvarez, M. (ES)
    del Corro, Elena (UFCH-W)
    Langa, F. (ES)
    Baonza, V. G. (ES)
    Taravillo, M. (ES)
    Zdroj.dok.RSC Advances. - : Royal Society of Chemistry - ISSN 2046-2069
    Roč. 6, č. 55 (2016), s. 49543-49550
    Poč.str.8 s.
    Jazyk dok.eng - angličtina
    Země vyd.GB - Velká Británie
    Klíč. slovahigh-pressure ; failure behavior ; graphitic carbon
    Vědní obor RIVCF - Fyzikální chemie a teoretická chemie
    Institucionální podporaUFCH-W - RVO:61388955
    UT WOS000377577800030
    DOI https://doi.org/10.1039/c5ra27162b
    AnotaceIn this work, we present the first study of highly compressed carbon nanohorns (CNHs). The experiments were performed in a sapphire anvil cell and the morphological changes induced in the CNHs samples were monitored simultaneously by Raman spectroscopy and subsequently by transmission electron microscopy. CNHs samples subjected to a maximum stress of 8 GPa in a single direct compression cycle showed broadened Raman spectra, corresponding to carbonaceous regions with graphite-like structures, surrounded by debundled dahlia-like structures. However, samples subjected to a moderate stress single cycle (2 GPa) exhibited morphological changes from dahlia-like to bud-like structures. Finally, consecutive moderate stress cycles led to the aggregation of such bud spheres towards the formation of a laminar material with horn-like structures at the edges; a very promising configuration for targeted functionalization. This study demonstrates the advantages of using stress for pretreating CNHs samples for subsequent reactivity and functionalization studies.
    PracovištěÚstav fyzikální chemie J.Heyrovského
    KontaktMichaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
    Rok sběru2017
Počet záznamů: 1  

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