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Download fileNanoparticle Superlattices through Template-Encoded DNA Dendrimers
journal contribution
posted on 11.10.2021, 16:35 authored by Ho Fung Cheng, Max E. Distler, Byeongdu Lee, Wenjie Zhou, Steven Weigand, Chad A. MirkinThe 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 interactionstemplate–dendron, dendrimer–dendrimer,
and DNA–modified AuNP-dendrimerare reported, illustrating
how sequence-defined recognition and dynamic association can be combined
to yield complex hierarchical materials.
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often highly complexfunctionalized gold nanoparticlesdepending upon choicebuilding blocks assemblecolloidal crystal engineering5 </ subdendrimer – dendrimerencoded dna dendrimerscolloidal crystalsdna dendrimerscomplementary dnadendrimer dendrimer lengthtaken togethersymmetry tistranded oligonucleotidesphase symmetrynanoparticle superlatticeshierarchical structuresform micellechemical interactions