Related Experiment Video
Updated: Jul 28, 2025
09:26
Synthesis and Characterization of Supramolecular Colloids
Published on: April 22, 2016
9.9K
A coarse-grained simulation model for colloidal self-assembly via explicit mobile binders
Gaurav Mitra1, Chuan Chang2, Angus McMullen3
1Department of Chemistry, New York University, New York, New York, 10003, USA.
Soft Matter
|May 31, 2023
Summary
Researchers developed a coarse-grained molecular dynamics model to study self-assembling colloidomers. This model precisely controls particle binding, enabling the creation of specific structures and revealing folding mechanisms.
Area of Science:
- Soft Matter Physics
- Materials Science
- Computational Chemistry
Background:
- Colloidal particles with mobile binding molecules offer a tunable platform for studying self-assembly.
- Controlling the number of bonds (valence) is key to forming specific structures like colloidomers.
- Previous experiments used DNA-coated droplets to achieve valence control.
Purpose of the Study:
- To develop a coarse-grained molecular dynamics (CGMD) model for simulating self-assembly with mobile binding sites.
- To investigate methods for tuning valence and optimizing the formation of linear colloidomer chains.
- To understand the dynamics of colloidomer folding and validate the model against experimental results.
Main Methods:
- Developed a CGMD model with explicit mobile binding sites.
- Simulated self-assembly under varying kinetic control and binding/unbinding dynamics.
- Utilized a temperature-dependent model to explore structural transitions.
- Implemented the model as an open-source plugin for HOOMD-Blue.
Main Results:
- Demonstrated valence control through kinetic tuning in the strong binding limit.
- Optimized parameters to achieve high yields of long, linear colloidomer chains.
- Observed temperature-induced collapse of heptamer chains into rigid structures, matching experimental data.
- Identified molecular features influencing binding patch size and valence.
Conclusions:
- The CGMD platform provides a powerful tool for understanding colloidomer self-assembly and folding.
- The dynamic bonding model accurately predicts structural transitions and guides experimental design.
- This work opens new avenues for programmable design and the study of complex self-assembly pathways.
Related Concept Videos
02:00Molecular Models
38.7K
Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
38.7K
01:34The Fluid Mosaic Model
149.2K
The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.
149.2K
01:18Assembly of Cytoskeletal Filaments
21.2K
Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
21.2K