Počet záznamů: 1
Silicalite-1 polycrystalline layers and crystal twins: Morphology and grain boundaries
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SYSNO ASEP 0081194 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Silicalite-1 polycrystalline layers and crystal twins: Morphology and grain boundaries Překlad názvu Polykrystalické vrstvy a krystaly-dvojčata silikalitu-1: morfologie, hranice zrn Tvůrce(i) Brabec, Libor (UFCH-W) RID, ORCID
Kočiřík, Milan (UFCH-W) RID, ORCIDZdroj.dok. Materials Chemistry and Physics. - : Elsevier - ISSN 0254-0584
Roč. 102, č. 1 (2007), s. 67-74Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. CN - Čína Klíč. slova silicalite-1 ; HF acid ; etching ; grain boundaries Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GA203/05/0846 GA ČR - Grantová agentura ČR CEZ AV0Z40400503 - UFCH-W (2005-2011) Anotace Silicalite-1 layers as well as individual crystal twins were synthesized from clear solutions using TPABr as template. Their morphology was characterized by scanning electron microscope (SEM). Large crystal twins coloured by iodine were also observed by light microscope. The compactness of a thin layer consisting of spherical crystals (twins) appeared much higher than that of prolonged ones. HF etching of as-synthesized polycrystalline silicalite-1 layers led to the formation of sharp slits along grain boundaries. So the grain boundaries became observable. Etching of calcined layers produced a sort of a negative image represented by preserved thin shells around dissolved crystals. Those shells - films of less organized silica remaining between neighboring crystals - were resistant against HF acid due to the presence of organic species formed during layer calcination. For large isolated silicalite-1 twins the etching patterns differed from those in layers. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2007
Počet záznamů: 1