Details

Autor(en) / Beteiligte

• Cheng, Ho Fung
• Distler, Max E
• Lee, Byeongdu
• Zhou, Wenjie
• Weigand, Steven
• Mirkin, Chad A

Titel

Nanoparticle Superlattices through Template-Encoded DNA Dendrimers

Ist Teil von

• Journal of the American Chemical Society, 2021-10, Vol.143 (41), p.17170-17179

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2021

Quelle

MEDLINE

Beschreibungen/Notizen

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