Structures of Adsorbed Initial Layers of Stearic Acid at the Liquid/Solid Interface

Autor:	Takashi Nemoto, Daisuke Takajo, Seiji Isoda
Rok vydání:	2004
Předmět:	Materials science General Engineering General Physics and Astronomy Liquid solid Epitaxy law.invention chemistry.chemical_compound Crystallography Adsorption Highly oriented pyrolytic graphite chemistry Chemical engineering law Stearic acid Scanning tunneling microscope Porosity Layer (electronics)
Zdroj:	Japanese Journal of Applied Physics. 43:4667
ISSN:	1347-4065 0021-4922
Popis:	The structures of stearic acid adsorbed initially on highly oriented pyrolytic graphite (HOPG) were examined at liquid/solid interfaces by scanning tunneling microscopy (STM). Depending on the concentrations of stearic acid in n-octylbenzene solutions, two structures were observed. For a saturated solution of stearic acid, the observed layer on HOPG was composed of large and stable domains under STM scanning, corresponding with the already reported structure (β-form). For low concentrations, molecular layers were also formed, but at the lowest concentration of 1.7 mM, the molecular layer became porous where an underlying layer with another structure (α-form) was observed. It was concluded that the α-form is the initially adsorbed layer and the second layer is formed as the β-form.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6ef2b01d050dcf5847b84020beadc36b https://doi.org/10.1143/jjap.43.4667 Zobrazit plný text záznamu