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Issue 44, 2013
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Super-compressible DNA nanoparticle lattices

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The compression properties of DNA–nanoparticle assemblies were studied by measuring their response to the applied osmotic pressure. The lattices of nanoparticles interconnected with DNA exhibit an isotropic transformation under compression with a remarkably strong decrease of the lattice constant, up to a factor of about 1.8, corresponding to more than 80% of the volume reduction. Using insitu small angle X-ray scattering and optical microscopy, we probe the DNA-induced effective interparticle interactions by measuring the macroscopic and nanoscale compression behaviours as a function of the applied osmotic stress. The force field extracted from experimental data can be well described by a theoretical model that takes into account confinement of DNA chains in the interstitial regions. We show that compression properties of these systems can be tuned via DNA molecular design.

Graphical abstract: Super-compressible DNA nanoparticle lattices

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The article was received on 09 May 2013, accepted on 22 Jul 2013 and first published on 12 Aug 2013

Article type: Communication
DOI: 10.1039/C3SM51289D
Soft Matter, 2013,9, 10452-10457

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    Super-compressible DNA nanoparticle lattices

    S. Srivastava, D. Nykypanchuk, M. M. Maye, A. V. Tkachenko and O. Gang, Soft Matter, 2013, 9, 10452
    DOI: 10.1039/C3SM51289D

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