Počet záznamů: 1  

Hydroxylation and self-assembly of colloidal hydrogenated nanodiamonds by aqueous oxygen radicals from atmospheric pressure plasma jet

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    SYSNO ASEP0497855
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevHydroxylation and self-assembly of colloidal hydrogenated nanodiamonds by aqueous oxygen radicals from atmospheric pressure plasma jet
    Tvůrce(i) Jirásek, Vít (UFP-V)
    Stehlík, Š. (CZ)
    Štenclová, P. (CZ)
    Artemenko, A. (CZ)
    Rezek, B. (CZ)
    Kromka, A. (CZ)
    Celkový počet autorů6
    Zdroj.dok.RSC Advances
    Roč. 8, č. 66 (2018), s. 37681-37692
    Poč.str.12 s.
    Jazyk dok.eng - angličtina
    Země vyd.GB - Velká Británie
    Klíč. slovasurface-barrier discharge ; diamond nanoparticles ; detonation nanodiamonds ; water ; ftir ; purification ; reactivity
    Vědní obor RIVCB - Analytická chemie, separace
    Obor OECDAnalytical chemistry
    CEPNV15-33018A GA MZd - Ministerstvo zdravotnictví
    GJ18-11711Y GA ČR - Grantová agentura ČR
    Institucionální podporaUFP-V - RVO:61389021
    UT WOS000450902700014
    EID SCOPUS85056896012
    DOI10.1039/c8ra07873d
    AnotacePlasma chemical surface modification of nanoparticles in gas-liquid type reactors enables a controllable, specific, low-cost, and environmentally friendly alternative to wet chemistry methods or thermal and dry plasma treatments. Here the atmospheric pressure radio-frequency microplasma jet (mu-APPJ) operating with 0.6% O-2 in He is used to deliver aqueous oxygen radicals (AOR) to the surface of similar to 3 nm hydrogenated detonation nanodiamonds (H-DNDs) suspended in water. The AOR-treated H-DND samples are characterized by FTIR and XPS spectroscopies and by AFM and SEM imaging. The main chemical reaction mechanism is identified as the abstraction of surface hydrogen atoms by O or OH radicals and a consequent attachment of the OH group, thereby increasing concentration of alcohols, carboxyls, and aldehydes on the DND's surface. FTIR spectra reveal also a structural re-arrangement of the surface water on the AOR-treated H-DNDs. Yet zeta-potential of AOR-treated H-DNDs still remains positive (decreases from +45 mV to +30 mV). The chemical modification gives rise to formation of nanoscale chain-like aggregates when AOR-treated H-DNDs are deposited on Si substrate.
    PracovištěÚstav fyziky plazmatu
    KontaktVladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
    Rok sběru2019
    Elektronická adresahttps://pubs.rsc.org/en/Content/ArticleLanding/2018/RA/C8RA07873D#!divAbstract
Počet záznamů: 1