Optically active neodymium hydroxide surface-functionalized mesoporous silica micro-cocoons for biomedical...

Area of Science:

• Materials Science
• Nanotechnology
• Biocompatible Materials

Background:

• Mesoporous silica microstructures offer tunable properties for various applications.
• Surface modification is crucial for enhancing functionality and biocompatibility.
• Neodymium compounds exhibit unique optical properties relevant for bio-applications.

Purpose of the Study:

• To synthesize and characterize neodymium hydroxide-surface modified mesoporous silica micro-cocoon microstructures.
• To evaluate the optical properties and colloidal stability of the synthesized materials.
• To assess the biocompatibility and non-toxicity of the microstructures for potential biomedical applications.

Main Methods:

• Facile single-step sol-gel chemical process for synthesis.
• X-ray Diffraction (XRD) for crystallographic analysis.
• Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) for morphological characterization.
• Optical property analysis in aqueous media.
• Zeta potential, MTT assay, and neutral red uptake assays for biocompatibility assessment.

Main Results:

• Successful synthesis of semi-crystalline, monodisperse, non-aggregated, mesoporous silica micro-cocoons with a SiO2@Nd(OH)3 core-shell structure.
• High colloidal stability and formation of a semi-transparent colloidal solution with characteristic Nd3+ absorption bands.
• Demonstrated excellent biocompatibility and non-toxicity, with good cell viability even at high concentrations and hydrophilic conditions.

Conclusions:

• The synthesized Nd(OH)3-surface modified mesoporous silica micro-cocoons exhibit desirable optical and biocompatibility properties.
• These microstructures are stable in aqueous media and possess excellent cell viability.
• The findings suggest potential applications as optical bio-probes and in drug delivery systems.