DNA-Programmed Epitaxy of Nanoparticle Superlattices
Abstract
This AFOSR YIP will combine biomolecule directed self-assembly methods and lithographic patterning to generate materials with precise structure control across multiple length scales. These designer materials will consist of nanoparticle superlattices that are epitaxially deposited on a patterned substrate, using DNA-grafted nanoparticles as building blocks. The crystallographic arrangement of particles will be dictated as a function of DNA design, while the lattice size, shape, and orientation will be determined by the lithographically-patterned surface. Pairing these twomethodologies offers the opportunity to completely dictate all aspects of structure from the atomic to millimeter length scales, presenting a transformative method for discovering and synthesizing new materials. Their research plan comprises a fundamental exploration of the unique types of structures that can be generated with this “top-down” meets “bottom-up” approach to material synthesis, followed by two target applications that will exploit the exemplary structural control it enables: (1) They will determine how lithographic pattern design, DNA sequence, and nanoparticle composition affect lattice size, shape, and defect positions in 3D. (2) They will utilize noblemetal nanoparticles to construct plasmonically active materials where manipulation of lattice structure is used to dictate lattice reflectivity and absorption. (3) They will fabricate 3D photonic crystals consisting of 100-300 nm particles assembled on microcontact printed substrates, allowing them to precisely mold the flow of visible light. This unique combination of lithography and biomolecule-directed self-assembly will enable the synthesis of designer materials with independent control over material structure at all length scales: atomic composition,nanoparticle shape, mesoscale ordering, and macroscale form factor.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 28, 2017
- Source ID
- FA95501710288
Entities
People
- Robert J Macfarlane
Organizations
- Air Force Office of Scientific Research
- Massachusetts Institute of Technology
- United States Air Force