2,3 Several protocols and techniques have been developed for the design of complex 2D 4,5 and 3D 6–8 geometries and networks. Over the last decades, DNA has acquired a remarkable role as a molecular building block at the nanoscale. Seeman, 1 has expanded the interest in DNA beyond genetics and biology. Introduction DNA nanotechnology, a fast growing field originating from the insightful vision of N. Our results show how little variations in the design of the DNA sequences allow tuning of the mechanical response of these biocompatible all-DNA materials. ![]() The frequency-dependent viscous and storage moduli and the viscosity reveal the different viscoelastic behavior of the two DNA hydrogels. ![]() While the first system forms a gel on cooling, the second one has been programmed to behave as a re-entrant gel, turning again to a fluid solution at low temperature. ![]() ![]() These thermoreversible systems are composed of tetravalent DNA-made nanostars whose sticky sequence is designed to provide controlled interparticle bonding. We present systematic characterisation by means of dynamic light scattering and particle tracking techniques of the viscosity and of the linear viscoelastic moduli, G′( ω) and G′′( ω), for two different DNA hydrogels.
0 Comments
Leave a Reply. |