Journal
NANO LETTERS
Volume 14, Issue 4, Pages 2162-2167Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl500473t
Keywords
DNA; nanoparticle; superlattice; rehydration; X-ray scattering; assembly
Categories
Funding
- AFOSR [FA9550-09-1-0294, FA9550-11-1-0275, FA9550-12-1-0280]
- National Science Foundation's MRSEC program at the Materials Research Center of Northwestern University [DMR-1121262]
- Nonequilibrium Energy Research Center (NERC), an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0000989]
- U.S. DOE [DE-AC02-06CH11357]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- MRSEC program at the Materials Research Center of the National Science Foundation [NSF DMR-1121262]
- Nanoscale Science and Engineering Center of the National Science Foundation [EEC-0118025/003]
- State of Illinois
- Northwestern University
- Indo-US postdoctoral fellowship
- NSF
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Colloidal self-assembly predominantly results in lattices that are either: (1) fixed in the solid state and not amenable to additional modification, or (2) in solution, capable of dynamic adjustment, but difficult to transition to other environments. Accordingly, approaches to both dynamically adjust the interparticle spacing of nanoparticle superlattices and reversibly transfer superlattices between solution-phase and solid state environments are limited. In this manuscript, we report the reversible contraction and expansion of nanoparticles within immobilized monolayers, surface-assembled superlattices, and free-standing single crystal superlattices through dehydration and subsequent rehydration. Interestingly, DNA contraction upon dehydration occurs in a highly uniform manner, which allows access to spacings as small as 4.6 nm and as much as a 63% contraction in the volume of the lattice. This enables one to deliberately control interparticle spacings over a 4-46 nm range and to preserve solution-phase lattice symmetry in the solid state. This approach could be of use in the study of distance-dependent properties of nanoparticle superlattices and for long-term superlattice preservation.
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