ArticleProceedings of the National Academy of Sciences of the United States of America2015
Stoichiometric control of DNA-grafted colloid self-assembly.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Encoding hierarchical 3D architecture through inverse design of programmable bonds.Nature materials · 2025Article
- Regulating phase behavior of nanoparticle assemblies through engineering of DNA-mediated isotropic interactions.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Article
- Rationally Programming Nanomaterials with DNA for Biomedical Applications.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2021Review
- Ordered three-dimensional nanomaterials using DNA-prescribed and valence-controlled material voxels.Nature materials · 2020Article
- Using symmetry to elucidate the importance of stoichiometry in colloidal crystal assembly.Nature communications · 2019Article
- Assembly of multi-flavored two-dimensional colloidal crystals.Soft matter · 2017Article
- Diamond family of nanoparticle superlattices.Science (New York, N.Y.) · 2016Article
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
There has been considerable interest in understanding the self-assembly of DNA-grafted nanoparticles into different crystal structures, e.g., CsCl, AlB2, and Cr3Si. Although there are important exceptions, a generally accepted view is that the right stoichiometry of the two building block colloids needs to be mixed to form the desired crystal structure. To incisively probe this issue, we combine experiments and theory on a series of DNA-grafted nanoparticles at varying stoichiometries, including noninteger values. We show that stoichiometry can couple with the geometries of the building blocks to tune the resulting equilibrium crystal morphology. As a concrete example, a stoichiometric ratio of 3:1 typically results in the Cr3Si structure. However, AlB2 can form when appropriate building blocks are used so that the AlB2 standard-state free energy is low enough to overcome the entropic preference for Cr3Si. These situations can also lead to an undesirable phase coexistence between crystal polymorphs. Thus, whereas stoichiometry can be a powerful handle for direct control of lattice formation, care must be taken in its design and selection to avoid polymorph coexistence.
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