Spectroscopic and Computational Characterization of the Adsorption of Quaternary Ammonium Ions on Ceria-Supported Colloidal Silica Particle Films.

ABSTRACT: The adsorption of molecular ions from aqueous solutions onto colloidal silica is utilized across a wide range of technologies. Measurement of such interactions using attenuated total reflectance/Fourier transform infrared (ATR/FT-IR) spectroscopy presents challenges due to the instability of colloidal silica particle films on an ATR's diamond crystal internal reflection element (IRE). Here, the instability of silica is addressed by first depositing a thin film of colloidal ceria particles on the IRE to improve silica's adhesion. This enables the application of ATR/FT-IR spectroscopy to characterize the adsorption of quaternary ammonium ions, including the poly(2-(trimethylamino)ethyl methacrylate) (pTMAEM) and compounds modeling pTMAEM's side chain functional groups, tetramet

SUBMITTER: Smiddy NM 

PROVIDER: S-EPMC12392718 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature