Encapsulation of spherical nanoparticles by colloidal dimers
Gianmarco Munaò1, Dino Costa, Santi Prestipino
1Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Universitá degli Studi di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy. gmunao@unime.it.
Physical Chemistry Chemical Physics : PCCP
|August 20, 2016
Summary
Colloidal dimers self-assemble into capsules to coat nanoparticles. Changing guest particle size and concentration influences the formation of these self-assembled structures, leading to diverse phase behaviors.
Area of Science:
- Colloid and surface science
- Materials science
- Computational chemistry
Background:
- Colloidal dispersions are fundamental in various applications.
- Understanding self-assembly processes is key to designing functional nanomaterials.
- Encapsulation of particles within colloidal structures offers pathways for controlled delivery and protection.
Purpose of the Study:
- To investigate the coating process of colloidal dimers onto spherical nanoparticles.
- To explore the phase behavior of a simplified mixture of hard spheres and hard dimers.
- To provide a framework for designing self-assembled structures for particle encapsulation.
Main Methods:
- Monte Carlo simulations were employed to model the coating process.
- A simplified mixture of hard spheres (guest particles) and hard dimers (encapsulating agents) was studied.
- Implicit-solvent representation was used, with size-dependent effective interactions.
Main Results:
- Rich phase behavior emerged by tuning guest particle size and concentration.
- Compact aggregates (capsules) formed at low guest sizes and/or concentrations.
- At larger sizes and moderate concentrations, phase separation between guest-rich and guest-poor regions was observed.
Conclusions:
- The study demonstrates tunable self-assembly of colloidal dimers for nanoparticle coating.
- The findings provide insights into designing functionalized dimers for encapsulating target particles.
- This research lays the groundwork for developing novel colloidal systems for applications like drug delivery.
More Related Videos
Related Concept Videos
01:29The Colloidal State
75
The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called...
75
03:22Colloids
21.9K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
21.9K