Spectral Analysis of Strontium-Doped Calcium Phosphate/Chitosan Composite Films

• Published in: Polymers Vol. 15; no. 21; p. 4245
• Main Authors: Zarif, Maria Elena, Bita, Bogdan, Yehia-Alexe, Sasa Alexandra, Negut, Irina, Groza, Andreea
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.11.2023
• Subjects: Calcium phosphate; Calcium phosphates; Chemical reactions; Chitosan; Deposition; Fourier transforms; High temperature; Hydroxyapatite; Infrared spectroscopy; Laser ablation; Lasers; Magnetron sputtering; Mass spectrometry; matrix assisted pulsed laser evaporation deposition; Molecular ions; Molecular structure; Molecular weight; Nitrates; Plasma; Pulsed lasers; Radio frequency; radio-frequency magnetron sputtering deposition; Silicon substrates; Solvents; Spectrum analysis; Strontium; strontium-doped calcium-phosphate; Thin films; X-ray spectroscopy; Massachusetts; Germany; Romania; United States > US
• ISSN: 2073-4360; 2073-4360
• DOI: 10.3390/polym15214245

Strontium-doped calcium phosphate/chitosan films were synthetized on silicon substrates using the radio-frequency magnetron sputtering technique and the matrix-assisted pulsed laser evaporation technique. The deposition conditions associated with the radio-frequency magnetron sputtering discharge, in particular, include the high temperature at the substrate, which promotes the formation of strontium-doped tetra calcium phosphate layers. The physical and chemical processes associated with the deposition of chitosan on strontium-doped calcium phosphate layers were investigated using Fourier Transform Infrared Spectroscopy, Energy Dispersive X-ray Spectroscopy, and Scanning Electron Microscopy. Mass spectrometry coupled with laser induced ablation of the composite films proved to be a useful tool in the detection of the molecular ions characteristic to chitosan chemical structure.