Amphiphilic-DNA Platform for the Design of Crystalline Frameworks with Programmable Structure and Functionality

Area of Science:

• * Nanotechnology
• * Materials Science
• * Supramolecular Chemistry

Background:

• * DNA nanotechnology offers a route to rationally design nanostructured materials due to nucleic acids' molecular recognition, synthesis ease, and functionalization options.
• * Creating crystalline DNA frameworks with programmable structure and functionality remains a significant challenge.
• * Existing all-DNA materials rely on precise molecular details of building blocks for structural control.

Purpose of the Study:

• * To demonstrate C-stars, a new class of amphiphilic DNA motifs, as a versatile platform for designing programmable DNA crystals.
• * To overcome the limitations of current DNA nanostructure fabrication.
• * To enable the creation of functional, ordered nanostructured frameworks for diverse technological applications.

Main Methods:

• * Design of simple amphiphilic DNA motifs (C-stars) with controlled topology and symmetry.
• * One-pot self-assembly reaction of C-stars into crystalline frameworks.
• * Variation of C-star design to tune lattice parameters and incorporate specific functionalities.

Main Results:

• * C-stars self-assemble into highly porous, functional, crystalline frameworks, with assembly controlled by topology and symmetry, not just molecular details.
• * A range of structurally and chemically distinct C-stars were created.
• * Frameworks exhibited tunable lattice parameters for controlled macromolecule partitioning.
• * Responsive motifs for isothermal disassembly and specific protein capture moieties were successfully embedded.

Conclusions:

• * C-stars provide a robust and versatile platform for creating programmable DNA crystals.
• * This approach enables fine-tuning of framework properties, including pore size and chemical functionality.
• * The developed C-star frameworks hold significant potential for applications in nanomedicine, energy storage, and molecular separation.