Simultaneous Second Harmonic Generation and Multiphoton Excited Photoluminescence in Samarium-Doped BaTiO<sub>3</sub> Nanoparticles Functionalized with Poly(ethylene glycol)
Simultaneous Second Harmonic Generation and Multiphoton Excited Photoluminescence in Samarium-Doped BaTiO<sub>3</sub> Nanoparticles Functionalized with Poly(ethylene glycol)
Authors
Fuentes, Sandra
Arancibia, Duxan
Rojas, Marcelo
Carmona, Francisca
Ortega, Andrea
Valenzuela, Julio
Hernandez Alvarez, Christian
Inocencio Martin, R.
Arancibia, Duxan
Rojas, Marcelo
Carmona, Francisca
Ortega, Andrea
Valenzuela, Julio
Hernandez Alvarez, Christian
Inocencio Martin, R.
Profesor GuĆa
Authors
Date
Datos de publicaciĆ³n:
10.1021/acsomega.4c00974
ACS OMEGA,Vol.9,28061-28071,2024
ACS OMEGA,Vol.9,28061-28071,2024
Tipo de recurso
Article
Keywords
Materia geogrƔfica
Collections
Abstract
In this work, samarium-doped BaTiO3 (BT:Sm) nanoparticles (NPs) were prepared and coated with poly(ethylene glycol) (PEG) to investigate their optical characteristics and compatibility with biological systems. The structure, particle morphology, optical properties, and biological compatibility of the NPs were assessed. The results demonstrated the formation of BT:Sm and [(BT:Sm)-PEG]. The relative intensities and positions of peaks in the X-ray diffraction (XRD) are consistent with an average crystallite size of similar to 75 nm. The Raman spectra showed that Sm doping produced the typical tetragonal peaks at around 306 and 715 cm(-1), and Fourier transform infrared (FTIR) spectroscopy showed that the PEGylation process was effective. Also, our investigation demonstrates the potential of these NPs as very temperature-sensitive nanosensors with a resolution exceeding 0.5 degrees C, which is achievable through optical excitation. We also analyze their emission properties. Finally, we present a study related with the mitochondrial activity of naked and PEG-coated NPs. The results indicate that neither naked nor PEG-coated NPs exhibit changes in mitochondrial metabolism, as indicated by quantitative cell viability and morphological visualization. The PEG-coated NPs prevented the formation of aggregates in cell culture compared to naked NPs, demonstrating the significance of PEG as a stabilizing agent.