Transmutable nanoparticles with reconfigurable surface ligands
Abstract
Colloidal particles can act as analogs of atoms for studying crystallization and packing behavior, but they don't naturally bond together the way atoms do. Short strands of DNA are one versatile way to link together colloidal particles (see the Perspective by Tao). Kim et al. designed a series of gold colloids with DNA ligands that reversibly bound to or released neighboring particles via DNA strands that opened or closed hairpin loops. Liu et al. devised a set of DNA strands that pack into origami structures. Inside each structure were strands that cage a gold nanoparticle. These were further linked to other uncaged nanoparticles to assemble a diamond-like structure. Changing the strand design yielded a wide range of sparsely packed colloidal crystals.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 05, 2016
- Source ID
- 10.1126/science.aad2212
Entities
People
- Chad Mirkin
- Matthew R. Jones
- Robert J Macfarlane
- Youngeun Kim
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- Northwestern University
- United States Department of Energy