Thermodynamic Framework for the Formation and Stability of Self-Assembled Nanostructures

Abstract

Self-assembled nanostructures represent one of the most significant paradigms in modern nanotechnology, offering bottom-up fabrication strategies that exploit thermodynamic driving forces to achieve precise structural organization at the nanoscale. This paper provides a comprehensive examination of the thermodynamic stability mechanisms governing self-assembled nanostructures, including micelles, vesicles, DNA origami complexes, peptide nanofibers, and metal-organic frameworks (MOFs). The interplay between enthalpy and entropy in the free energy landscape is explored in depth, with attention to how temperature, solvent polarity, ionic strength, pH, and molecular concentration modulate structural integrity. we critically evaluate thermodynamic stability parameters such as Gibbs free energy, critical aggregation concentration, and phase transition temperatures. Methodology encompasses a suite of analytical techniques including differential scanning calorimetry (DSC), isothermal titration calorimetry (ITC), dynamic light scattering (DLS), small-angle X-ray scattering (SAXS), and molecular dynamics (MD) simulations. Key results are summarized across four data tables that capture thermodynamic profiles of diverse nanostructure classes. The findings underscore the delicate balance of non-covalent interactions and demonstrate that rational engineering of these forces yields nanostructures with tunable, programmable stabilities applicable to drug delivery, catalysis, sensing, and responsive materials. This review advances understanding of fundamental stability principles and outlines future directions for designing robust, stimuli-responsive nanoarchitectures.