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Updated: Mar 19, 2026
05:08
Solubility of Hydrophobic Compounds in Aqueous Solution Using Combinations of Self-assembling Peptide and Amino Acid
Published on: September 20, 2017
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A solvent-topology perspective on hydrophobic aggregation.
1Biosystems and Bioprocess Engineering (Bio2Eng) Group, Institute of Marine Research of Spanish Research Council, IIM-CSIC, C/Eduardo Cabello 6, Vigo, Pontevedra, 36208, Spain. vdominguez@iim.csic.es.
Soft Matter
|March 18, 2026
Summary
Hydrophobic aggregation arises from solvent reorganization, not just solute attraction. Solvent topology changes, revealing a solvent-driven crossover rather than a sharp phase transition.
Area of Science:
- Soft Matter Physics
- Computational Chemistry
- Statistical Mechanics
Background:
- Hydrophobic aggregation is typically explained by attractive forces between nonpolar molecules.
- Solvent reorganization and its properties are crucial in aqueous and soft-matter environments.
- Minimal lattice models can elucidate complex aggregation phenomena.
Purpose of the Study:
- To investigate hydrophobic aggregation using a minimal lattice model without explicit solute-solute attractions.
- To understand the role of solvent reorganization and connectivity in driving aggregation.
- To differentiate between solvent-driven topological crossovers and traditional thermodynamic phase transitions.
Main Methods:
- Developed a lattice model with solvent and apolar segments at fixed composition.
- Defined restricted solvent sites based on local apolar segment density.
- Sampled configurations using a Boltzmann-like weight penalizing restricted solvent.
- Analyzed solvent and solute connectivity using percolation theory and clustering measures.
Main Results:
- Aggregation emerged solely from solvent restriction field reorganization.
- Restricted solvent connectivity exhibited a sharp crossover, system-spanning only in intermediate solute fractions.
- Free solvent remained system-spanning across all concentrations.
- Solvent topology signatures were sharper than solute ordering metrics.
- System size effects showed monotonic growth of restricted solvent but non-trivial connectivity reorganization.
Conclusions:
- Hydrophobic aggregation is better described as a solvent-driven topological crossover.
- Solvent topology serves as a sensitive indicator of aggregation dynamics.
- The study highlights the critical role of solvent reorganization in hydrophobic effects.
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