Infrared reflection absorption spectroscopy study of smectite clay monolayers

Robin H A Ras, József Németh, Cliff T. Johnston, Imre Dékány, Robert A. Schoonheydt*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

15 Sitaatiot (Scopus)

Abstrakti

Infrared reflection absorption spectroscopy (IRRAS), also called infrared external reflection spectroscopy, is used for studying ultrathin hybrid clay films prepared by the Langmuir-Blodgett (LB) method. Infrared spectra of the hybrid films have been obtained at the air-water and air-solid (gold) interface. The presence of a smectite monolayer is observed when cationic surfactants are spread over the surface of a dilute aqueous smectite clay suspension. The in-plane ν(Si-O) band of saponite is observed in IRRAS spectra of saponite clay monolayers at the air-water interface. In contrast, the out-of-plane ν(Si-O) band at 1063 cm-1 is the dominant band in the p-polarized IRRAS spectra of a saponite monolayer deposited on a gold surface. These data correspond to the first-reported infrared spectra of clay minerals showing the enhancement of the out-of-plane vibrational modes and the nearly complete suppression of the in-plane vibrational modes. The results provide direct spectroscopic evidence confirming the orientation of the smectite particles parallel to the substrate.

AlkuperäiskieliEnglanti
Sivut291-294
Sivumäärä4
JulkaisuThin Solid Films
Vuosikerta466
Numero1-2
DOI - pysyväislinkit
TilaJulkaistu - 1 marraskuuta 2004
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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  • Siteeraa tätä

    Ras, R. H. A., Németh, J., Johnston, C. T., Dékány, I., & Schoonheydt, R. A. (2004). Infrared reflection absorption spectroscopy study of smectite clay monolayers. Thin Solid Films, 466(1-2), 291-294. https://doi.org/10.1016/j.tsf.2004.02.043