Energetics of biomolecular shells in core-shell nanocomplexes

Area of Science:

• Nanotechnology
• Materials Science
• Biophysics

Background:

• Assessing the thermodynamic stability of core-shell nanoparticles is crucial for their application in complex media.
• Understanding nanoparticle interactions with biomolecules is essential for biomedical applications.
• Patchy core-shell nanocomplexes offer unique properties for advanced material design.

Purpose of the Study:

• To introduce and validate the stabilization enthalpy as a quantitative measure for the thermodynamic stability of patchy core-shell nanocomplexes.
• To experimentally determine the stabilization enthalpies of magnetite nanoparticles coated with model biomolecules.
• To elucidate the contributions of hydration and adsorption to the overall stability.

Main Methods:

• Definition of stabilization enthalpy using hydrated core and shell species as reference states.
• Experimental determination of stabilization enthalpies for magnetite (Fe3O4) nanoparticles coated with bovine serum albumin, potato starch, and lauric acid.
• Analysis of primary hydration enthalpy and biomolecular adsorption contributions.

Main Results:

• Stabilization enthalpy was successfully applied to quantify the thermodynamic stability of core-shell nanocomplexes.
• Experimental data provided specific stabilization enthalpy values for the tested nanoparticle-biomolecule systems.
• The study differentiated and quantified the roles of hydration and adsorption in nanoparticle stabilization.

Conclusions:

• Stabilization enthalpy provides a robust quantitative basis for evaluating nanoparticle stability and interactions.
• The findings are critical for designing and utilizing nanoparticles in biological and other complex systems.
• This approach is highly relevant for advancing biomedical applications of nanomaterials.