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 ASEP 0497855 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Hydroxylation 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 autorů 6 Zdroj.dok. RSC Advances. - : Royal Society of Chemistry
Roč. 8, č. 66 (2018), s. 37681-37692Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova surface-barrier discharge ; diamond nanoparticles ; detonation nanodiamonds ; water ; ftir ; purification ; reactivity Vědní obor RIV CB - Analytická chemie, separace Obor OECD Analytical chemistry CEP NV15-33018A GA MZd - Ministerstvo zdravotnictví GJ18-11711Y GA ČR - Grantová agentura ČR Institucionální podpora UFP-V - RVO:61389021 UT WOS 000450902700014 EID SCOPUS 85056896012 DOI 10.1039/c8ra07873d Anotace Plasma 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. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2019 Elektronická adresa https://pubs.rsc.org/en/Content/ArticleLanding/2018/RA/C8RA07873D#!divAbstract
Počet záznamů: 1