AI Article Synopsis
- Multicomponent nanocrystal superlattices have unique properties stemming from their mesoscale structures, but traditional alkyl-chain ligands can limit their programmability.
- Polymeric ligands improve programmability by allowing for better control over size and interactions through adjustments in molecular weight and structure.
- The research demonstrates the creation of binary nanocrystal superlattices with organized structures by tuning nanocrystal size and polymer ligands, enabling new designs for functional materials with controlled properties.
Article Abstract
Multicomponent nanocrystal superlattices represent an interesting class of material that derives emergent properties from mesoscale structure, yet their programmability can be limited by the alkyl-chain-based ligands decorating the surfaces of the constituent nanocrystals. Polymeric ligands offer distinct advantages, as they allow for more precise tuning of the effective size and 'interaction softness' through changes to the polymer's molecular weight, chemical nature, architecture, persistence length and surrounding solvent. Here we show the formation of 10 different binary nanocrystal superlattices (BNSLs) with both two- and three-dimensional order through independent adjustment of the core size of spherical nanocrystals and the molecular weight of densely grafted polystyrene ligands. These polymer-brush-based ligands introduce new energetic contributions to the interparticle potential that stabilizes various BNSL phases across a range of length scales and interparticle spacings. Our study opens the door for nanocrystals to become modular elements in the design of functional particle brush solids with controlled nanoscale interfaces and mesostructures.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4686769 | PMC |
| http://dx.doi.org/10.1038/ncomms10052 | DOI Listing |
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