Nicolet is50r ftir microscope

By using Fourier transform infrared spectroscopy (FTIR) in the wavenumber range 4000–400 cm⁻¹ we investigated the presence of certain functional groups and the interactions between some components of the nanocomposite films. A Nicolet iS50 FTIR spectrometer (Thermo Fisher Scientific Inc., Waltham, MA, USA), equipped with a DTGS detector, was used to record the spectra. We used a resolution of 4 cm⁻¹, and each spectra was obtained by averaging 32 scans.
FTIR 2D maps were recorded with a Nicolet iS50R FTIR microscope (Thermo Fisher Scientific Inc., Waltham, MA, USA), with DTGS detector, in the wavenumber range 4000–600 cm⁻¹. The 2D FTIR maps were used to obtain information about the spatial distribution of the components

Infrared spectra of the 10G/Alg, 10G/Alg/FA, 10G/Alg/FA/Fe₃O₄, and the constituent materials (sodium alginate, folic acid, glycerol) were recorded with an iS50 FT-IR spectrometer (Thermo Fischer Scientific, Waltham, MA, USA) in ATR mode. Samples were scanned in the range between 4000 and 400 cm⁻¹ at 4 cm⁻¹ resolution.
The FT-IR maps were assessed with a Nicolet iS50R FTIR microscope with a DTGS detector (Thermo Fisher Scientific, Waltham, MA, USA) to identify the structural homogeneity of the magnetic films.