Počet záznamů: 1
Coupled chemical reactions in dynamic nanometric confinement: Ag2O membrane formation during ion track etching
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SYSNO ASEP 0421056 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Coupled chemical reactions in dynamic nanometric confinement: Ag2O membrane formation during ion track etching Tvůrce(i) Hernandez, G. M. (MX)
Cruz, S. A. (MX)
Quintero, R. (MX)
Arellano, H. G. (MX)
Fink, Dietmar (UJF-V) ORCID, SAI
Alfonta, L. (IL)
Mandabi, Y. (IL)
Kiv, A. (IL)
Vacík, Jiří (UJF-V) RID, ORCID, SAICelkový počet autorů 9 Zdroj.dok. Radiation Effects and Defects in Solids. - : Taylor & Francis - ISSN 1042-0150
Roč. 168, č. 9 (2013), s. 675-695Poč.str. 21 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova track ; polymers ; etching ; chemistry ; ions ; nanostructure Vědní obor RIV BM - Fyzika pevných látek a magnetismus Institucionální podpora UJF-V - RVO:61389005 UT WOS 000325602400006 EID SCOPUS 84886426137 DOI 10.1080/10420150.2012.748764 Anotace In this study, continuous swift heavy ion tracks in thin polymer foils were etched from both sides to create two conical nanopores opposing each other. Shortly before both cones merged, one of the nanopores was filled with a silver salt solution, whereas etching of the other cone continued. At the moment of track breakthrough, the etchant reacted with the silver salt solution by forming an impermeable and insulating membrane. Continued etching around the thus-created obstacle led to repetitive {etchant - silver salt solution} interactions. The coupling of the two chemical reactions, {etchant - polymer} and {etchant silver salt solution}, within the confinement of etched tracks, with continuously changing shapes, showed a highly dynamic nature as recorded by measuring both the electrical current and the optical transmission across the foils. At low etching speeds, a central membrane that grew in radius and thickness with time until, at a critical thickness, the membrane became rather impermeable was formed. However, at high etching speeds, the emerging reaction products exhibited a sponge-like consistency, which allowed for their infinite growth. This precipitation was accompanied by a pronounced current spike formation. A simple theoretical model explains, at a minimum, the basic features. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2014
Počet záznamů: 1