Models for biomedical interfaces: a computational study of quinone-functionalized amorphous silica surface features.

Area of Science:

• Materials Science
• Computational Chemistry
• Biomedical Engineering

Background:

• Surface functionalization is key for developing advanced biomaterials.
• Catechol and quinone compounds are explored for antimicrobial coatings in implants and dentistry.

Purpose of the Study:

• To investigate the atomistic interactions between ortho-benzoquinone and amorphous silica surfaces.
• To provide insights into the configuration, bonding, and spectral properties of functionalized silica.
• To lay the groundwork for simulating antimicrobial peptide interactions on these surfaces.

Main Methods:

• Density Functional Theory (DFT) with the PBE functional.
• Atomistic modeling of amorphous silica surface functionalization.
• Ab initio molecular dynamics simulations.
• Infrared (IR) spectra simulation.

Main Results:

• Detailed understanding of ortho-benzoquinone's interaction with silanol groups.
• Characterization of functional group configurations, hydrogen bonding, and dispersion forces.
• Simulation of IR spectra for the model surface coating.
• Insights into the mobility of functionalizing groups via molecular dynamics.

Conclusions:

• The study provides crucial atomistic details for designing silica-based antimicrobial coatings.
• The findings support the use of quinone-based compounds for biomedical surface modification.
• The work establishes a foundation for future simulations of antimicrobial peptide condensation.