Nanoparticle Superlattices through Template-Encoded DNA Dendrimers

• DOI: 10.1021/jacs.1c07858
• Publication Date: 2021-10-11T16:55:12Z
• Authors: Ho Fung Cheng; Max E. Distler; Byeongdu Lee; Wenjie Zhou; Steven Weigand; Chad A. Mirkin
• Keywords: Template

The chemical interactions that lead to the emergence of hierarchical structures are often highly complex and difficult program. Herein, synthesis a series superlattices based upon 30 different structurally reconfigurable DNA dendrimers is reported, each which presents well-defined number single-stranded oligonucleotides (i.e., sticky ends) on its surface. Such building blocks assemble with complementary DNA-functionalized gold nanoparticles (AuNPs) yield five distinct crystal structures, depending choice dendrimer defined by phase symmetry. These can associate form micelle-dendrimers, whereby extent association be modulated surfactant concentration length produce low-symmetry Ti5Ga4-type has yet reported in field colloidal engineering. Taken together, crystals feature three types particle bonding interactions—template–dendron, dendrimer–dendrimer, DNA–modified AuNP-dendrimer—are illustrating how sequence-defined recognition dynamic combined materials.