Počet záznamů: 1
Effect of Graphite Aging on Its Wetting Properties and Surface Blocking by Gaseous Nanodomains
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SYSNO ASEP 0576103 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Effect of Graphite Aging on Its Wetting Properties and Surface Blocking by Gaseous Nanodomains Tvůrce(i) Tarábková, Hana (UFCH-W) RID, ORCID
Janda, Pavel (UFCH-W) RID, ORCIDZdroj.dok. Langmuir. - : American Chemical Society - ISSN 0743-7463
Roč. 39, č. 39 (2023), s. 14154-14161Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Hydrophobicity ; Carbon ; Nanobubbles Vědní obor RIV CG - Elektrochemie Obor OECD Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) Způsob publikování Open access Institucionální podpora UFCH-W - RVO:61388955 UT WOS 001071597400001 EID SCOPUS 85173603235 DOI 10.1021/acs.langmuir.3c02151 Anotace Early works considered basal planes of highly ordered pyrolytic graphite (HOPG) as hydrophobic, relatively inert materials with low electrocatalytic activity due to nonpolar sp2 carbon. On the contrary, a freshly prepared HOPG surface exhibits intrinsically mildly hydrophilic properties, with a low contact angle of water, which increases after exposure to an ambient atmosphere. This process, called aging, ascribed to adsorption of airborne hydrocarbons, is reportedly accompanied by strong decay of electron transfer kinetics, the mechanism of which is not yet fully understood. Examining both freshly prepared and aged basal plane HOPG immersed in water by PeakForce quantitative nanomechanical imaging, we have found that aged HOPG is occupied by ambient gaseous nanodomains, the existence of which is explained by incomplete wetting. They cover up to 60% of the immersed surface and their incidence is in direct relation with graphite aging time. In contrast with aged graphite, gaseous nanodomains were absent on the freshly stripped HOPG surface. It can be concluded that ambient gaseous nanodomains can prevent aged basal plane HOPG from contact with aqueous media and may thus affect processes at the solid–liquid interface. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2024 Elektronická adresa https://hdl.handle.net/11104/0345710
Počet záznamů: 1