Soft elasticity of RNA gels and negative Poisson ratio

Amir Ahsan, Joseph Rudnick, Robijn Bruinsma
2007 Physical Review E  
We propose a model for the elastic properties of RNA gels. The model predicts anomalous elastic properties in the form of a negative Poisson ratio and shape instabilities. The anomalous elasticity is generated by the non-Gaussian force-deformation relation of single-stranded RNA. The effect is greatly magnified by broken rotational symmetry produced by double-stranded sequences and the concomitant soft modes of uniaxial elastomers.
doi:10.1103/physreve.76.061910 pmid:18233872 fatcat:wuaur4h3mnfj5cnovx5tv7mhgu