Krs 5prism

To ensure the link between the SA and PVA functional groups and also the chemical bonds, specific values of each sample were prepared and analyzed by an infrared spectrometer (FTIR, SHIMADZU, 8400S model Japan) with KRS-5PRISM at a 45-degree angle. The IR spectrum was recorded in the frequency range 500 to 4000 cm⁻¹.

The interactions of organic molecules (curcumin, capsaicin) with the surface groups of the parent and Ag-containing silica particles were studied with the attenuated total reflection infrared method. ATR-FTIR spectra were recorded by means of IRAffinity-1 Fourier Transform Infrared spectrophotometer (Shimadzu Europa GmbH, Duisburg, Germany) with MIRacle Attenuated Total Reflectance Attachment. The instrument is equipped with a temperature-controlled, high-sensitivity DLATGS detector and ATR attachment with a KRS-5 prism, both purchased from Shimadzu Europa GmbH (Duisburg, Germany). For each sample, 50 scans with 4 cm⁻¹ resolution were applied, and the spectral data wereprocessed with an IR solution software.