DNA-mediated multivalent interactions between colloidal particles have been extensively applied for their ability to program bulk phase behaviour and dynamic processes. Exploiting the competition between different types of DNA-DNA bonds, here we experimentally demonstrate the selective triggering of colloidal self-assembly in the presence of a functionalised surface, which induces changes in particle-particle interactions. Besides its relevance to the manufacturing of layered materials with controlled thickness, the intrinsic signal-amplification features of the proposed interaction scheme make it valuable for biosensing applications.
@article{arxiv.2008.03991,
title = {Adaptable DNA interactions regulate surface triggered self assembly},
author = {Roberta Lanfranco and Pritam Kumar Jana and Gilles Bruylants and Pietro Cicuta and Bortolo Matteo Mognetti and Lorenzo Di Michele},
journal= {arXiv preprint arXiv:2008.03991},
year = {2020}
}