Article

DNA linker-mediated crystallization of nanocolloids

Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA.
Journal of the American Chemical Society (Impact Factor: 11.44). 03/2008; 130(8):2442-3. DOI: 10.1021/ja710710j
Source: PubMed

ABSTRACT Biofunctionalized nanocolloids offer a promising platform for creation of novel materials using bio-addressable interactions. Crystalline phases are of especial interest for the development of novel functional structures. We demonstrate that crystallization of nanocolloids can be achieved via hybridization of dispersed non-complementary single stranded DNA capped colloids with flexible single-stranded linker DNA. The crystalline structure belongs to body central cubic lattice and exhibits large thermal expansion. The evolution of the structure has been studied in details using in-situ small angle x-ray scattering. The formation of crystalline structures and reduced metastability are observed for systems with longer DNA linkers.

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