Laser-Induced Breakdown Spectroscopy (LIBS) for Monitoring the Formation of Hydroxyapatite Porous Layers

Abstract

Laser-induced breakdown spectroscopy (LIBS) is applied to characterize the formation of porous hydroxyapatite layers on the surface of 0.8CaSiO3-0.2Ca3(PO4)2 biocompatible eutectic glass immersed in simulated body fluid (SBF). Compositional and structural characterization analyses were also conducted by field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), and micro-Raman spectroscopy.

Ultrafast Laser Inscription of Buried Waveguides in W-TCP Bioactive Eutectic Glasses

“…Furthermore, the incorporation of trivalent rare-earth (RE) ions can also be used as local ordering probe due to the close relation between their spectroscopic properties and the local structure and bonding at the ion site, since the spectroscopic properties of trivalent rare-earth ions depend on the chemical composition of the glass matrix, which determines the structure and nature of the bonds, and thus spectroscopic characterization allows studying the local structure surrounding the RE ion and the covalence of the RE-O bond [91,92]. In particular, site-selective excitation and emission of Nd-and Eu-doped W-TCP glass ceramics provided information about the differences on the spectral features of amorphous and crystalline environments in this matrix, allowing the identification by means of Raman and LIBS of crystalline phases corresponding to dicalcium silicate (Ca 2 SiO 4 ) and apatite-like structures, both with well-known bioactive and biocompatible properties [93][94][95]. These results showed the potential applications of these materials obtained from the LFZ technique as luminescence bioprobes for in vitro applications and promote extended studies to other rare-earth ions, which can be used in biomedical applications such as multicolor bioprobes and biosensors among others.…”

Potentialities of a Laser-Induced Breakdown Spectroscopy Technique in the Study of Polymer Composites

“…9 The application field of LIBS has been greatly expanded due to the above-mentioned performance improvements, minimal sample preparation requirements, and LIBS being minimally destructive. 10,11 Specifically, LIBS has proven to be useful in different areas: identification of polymers 12,13 and post-consumer plastics, 14 metals 15 and detection of contaminants in algae. 16 However, to our knowledge, there is a scarce bibliography on the use of LIBS in polymeric matrix composites.…”

Generation of a Porous Scaffold with a Starting Composition in the CaO–SiO2–MgO–P2O5 System in a Simulated Physiological Environment

“…It is well known that wollastonite (CaSiO 3 ), larnite ( ), and their combinations are suitable for tissue engineering that favors implant attachment to bone tissue, as they have the ability to generate a hidroxyapatite (HAp) layer in contact with simulated body fluid (SBF) and to stimulate the proliferation and adhesion of osteoblast cells. Among the multiphasic ceramics, Ca 3 (PO 4 ) 2 -CaSiO 3 [7][8][9], Ca 3 (PO 4 ) 2 -CaMg(SiO 3 ) 2 [10], CaSiO 3 -CaMg(SiO 3 ) 2 [11], and Ca 3 (PO 4 ) 2 -CaSiO 3 -CaMg(SiO 3 ) 2 [12] eutectics, also suitable for tissue engineering, have been widely studied for their bioactivity. The SBF solution mimics human blood plasma in terms of pH and ionic concentration.…”