Abstract:
:Patchy particles with shape complementarity can serve as building blocks for assembling colloidal superstructures. Alternatively, encoding information on patches using DNA can direct assembly into a variety of crystalline or other preprogrammed structures. Here, we present a tool where DNA is used both to engineer shape and to encode information on colloidal particles. Two reactive oil emulsions with different but complementary DNA (cDNA) brushes are assembled into CsCl-like crystalline lattices. The DNA brushes are recruited to and ultimately localized at the junctions between neighboring droplets, which gives rise to DNA-encoded faceted patches. The emulsions are then solidified by ultraviolet (UV) polymerization, producing faceted patchy particles. The facet size and DNA distribution are determined by the balance between the DNA binding energy and the elastic deformation energy of droplets. This method leads to a variety of new patchy particles with directional interactions in scalable quantities.
journal_name
Proc Natl Acad Sci U S Aauthors
Diaz A JA,Oh JS,Yi GR,Pine DJdoi
10.1073/pnas.1918504117subject
Has Abstractpub_date
2020-05-19 00:00:00pages
10645-10653issue
20eissn
0027-8424issn
1091-6490pii
1918504117journal_volume
117pub_type
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