Multivalent particles

Silica particles with a controlled number of entropic patches, i.e. dimples, are synthesized through the growth of the silica core of binary multipods that have been produced by a seeded-growth emulsion polymerization reaction. The PS nodules are used as protecting masks to regioselectively graft amino groups, as revealed by the adsorption of gold markers. After dissolution of the PS nodules, some polymer chains remain grafted onto the silica surface, forming organic bumps. These residues are also selectively functionalized, leading to silica particles with both entropic and enthalpic patches. Colloidal polymers assembled through reduction of the solvent quality for the PS chains and linked by hydrophobic associations.

[1] C. Hubert, C. Chomette, A. Désert, A. Madeira, A. Perro, I. Florea, D. Ihaiawakrim, O. Ersen, A. Lombardi, E. Pertreux, F. Vialla, P. Maioli, A. Crut, N. Del-Fatti, F. Vallée, S. Mornet, J. Majimel, S. Ravaine E. Duguet, and M. Tréguer-Delapierre, Versatile template-directed synthesis of highly-symmetrical gold nanocages with predefined number of the openings. Nanoscale Horizons, 6, 311-318 (2021).

[2] W. Li, C. Hubert, A. Perro, E. Duguet and S. Ravaine, Self-assembly of colloidal polymers from two-patch silica nanoparticles. Nano Research, 13, 3371–3376 (2020).

[3] C. Hubert, C. Chomette, P.-E. Rouet, A. Désert, M. Treguer-Delapierre, S. Mornet, A. Perro, E. Duguet and S. Ravaine, “Regioselective functionalization of dimpled silica particles”, Coll Surf A. 510, 239–244 (2016).

[4] C. Chomette, E. Duguet, S. Mornet, V. N. Manoharan, N. B. Schade, C. Hubert, S. Ravaine, A. Perro and M. Treguer-Delapierre, “Templated growth of gold satellites on dimpled silica cores”, Faraday discussion, 191, 105-116 (2016).

[5] E. Duguet, C. Hubert, C. Chomette, A. Perro, S. Ravaine “Patchy colloidal particles for programmed self-assembly”, C. R. Chimie. 19, 173-182 (2016).

[6] C. Hubert, C. Chomette, A. Désert, M. Sun, M. Treguer-Delapierre, S. Mornet, A. Perro, E. Duguet and S. Ravaine, “ Synthesis of multivalent silica nanoparticles combining both enthalpic and entropic patchiness” Faraday discussions, 181, 139-146 (2015).