Entropy-Driven Crystallization Behavior in DNA-Mediated Nanoparticle Assembly
- Northwestern Univ., Evanston, IL (United States)
Herein, we report an example of entropy-driven crystallization behavior in DNA-nanoparticle superlattice assembly, marking a divergence from the well-established enthalpic driving force of maximizing nearest-neighbor hybridization connections. Such behavior is manifested in the observation of a non-close-packed, body-centered cubic (bcc) superlattice when using a system with self-complementary DNA linkers that would be predicted to form a close-packed, face-centered cubic (fcc) structure based solely on enthalpic considerations and previous design rules for DNA-linked particle assembly. Notably, this unexpected phase behavior is only observed when employing long DNA linkers with unpaired “flexor” bases positioned along the length of the DNA linker that increase the number of microstates available to the DNA ligands. A range of design conditions are tested showing sudden onsets of this behavior, and these experiments are coupled with coarse-grained molecular dynamics simulations to show that this entropy-driven crystallization behavior is due to the accessibility of additional microstates afforded by using long and flexible linkers.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Bio-Inspired Energy Science (CBES)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- SC0000989
- OSTI ID:
- 1370658
- Alternate ID(s):
- OSTI ID: 1470463
- Journal Information:
- Nano Letters, Journal Name: Nano Letters Journal Issue: 8 Vol. 15; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
77 NANOSCIENCE AND NANOTECHNOLOGY
DNA
bio-inspired
catalysis (homogeneous)
charge transport
colloidal crystals
crystallization
genetics
lattices hybridization
materials and chemistry by design
mesostructured aterials
nanomaterials
nanoparticle superlattice
nanoparticles
self-assembly
solar (photovoltaic)
synthesis (novel materials)
synthesis (self-assembly)
DNA
bio-inspired
catalysis (homogeneous)
charge transport
colloidal crystals
crystallization
genetics
lattices hybridization
materials and chemistry by design
mesostructured aterials
nanomaterials
nanoparticle superlattice
nanoparticles
self-assembly
solar (photovoltaic)
synthesis (novel materials)
synthesis (self-assembly)