| Autor: |
Dong Meng, Sanat K. Kumar, Gary S. Grest, Nathan A. Mahynski, Athanassios Z. Panagiotopoulos |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
npj Computational Materials, Vol 3, Iss 1, Pp 1-7 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
2057-3960 |
| DOI: |
10.1038/s41524-016-0005-8 |
| Popis: |
Colloids: Polymers hold it together, for a while Polymers need to be the right length if they are to hold NPs into a crystal structure, shows research from scientists in the USA. Sanat Kumar from Columbia University and colleagues explain why small particles suspended in a solution, known as a colloid, become ordered then disordered when a polymer is added. The particles in a colloid are usually free to move around, but the addition of a polymer causes them to form a crystal-like structure. Adding more polymer returns the colloid to a disordered state. Kumar et al. use molecular dynamic simulations and density functional theory to show that this occurs because, while the crystal is stabilized at intermediate polymer density by polymer-induced nanoparticle attraction, it is destabilized at higher densities when the longer polymer chains can’t fit in the gaps between the particles. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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