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Meena SK, Goldmann C, Nassoko D, Seydou M, Marchandier T, Moldovan S, Ersen O, Ribot F, Chanéac C, Sanchez C, Portehault D, Tielens F, Sulpizi M. Nanophase Segregation of Self-Assembled Monolayers on Gold Nanoparticles. ACS NANO 2017; 11:7371-7381. [PMID: 28613838 DOI: 10.1021/acsnano.7b03616] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nanophase segregation of a bicomponent thiol self-assembled monolayer is predicted using atomistic molecular dynamics simulations and experimentally confirmed. The simulations suggest the formation of domains rich in acid-terminated chains, on one hand, and of domains rich in amide-functionalized ethylene glycol oligomers, on the other hand. In particular, within the amide-ethylene glycol oligomers region, a key role is played by the formation of interchain hydrogen bonds. The predicted phase segregation is experimentally confirmed by the synthesis of 35 and 15 nm gold nanoparticles functionalized with several binary mixtures of ligands. An extensive study by transmission electron microscopy and electron tomography, using silica selective heterogeneous nucleation on acid-rich domains to provide electron contrast, supports simulations and highlights patchy nanoparticles with a trend toward Janus nano-objects depending on the nature of the ligands and the particle size. These results validate our computational platform as an effective tool to predict nanophase separation in organic mixtures on a surface and drive further exploration of advanced nanoparticle functionalization.
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Affiliation(s)
- Santosh Kumar Meena
- Institute of Physics, Johannes Gutenberg University Mainz , Staudingerweg 7, 55099 Mainz, Germany
| | - Claire Goldmann
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Douga Nassoko
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
- Ecole Normale Supérieure , Rue du 22 Octobre, Quartier du Fleuve, BP 241 Bamako, Mali
| | - Mahamadou Seydou
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS , 15 rue J.-A. de Baïf, 75205 CEDEX 13 Paris, France
| | - Thomas Marchandier
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Simona Moldovan
- Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 du CNRS , 23 rue du Loess, 67087 Strasbourg, France
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 du CNRS , 23 rue du Loess, 67087 Strasbourg, France
| | - François Ribot
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Corinne Chanéac
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Clément Sanchez
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - David Portehault
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Frederik Tielens
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Universités , 11 place Marcelin Berthelot, 75005 Paris, France
| | - Marialore Sulpizi
- Institute of Physics, Johannes Gutenberg University Mainz , Staudingerweg 7, 55099 Mainz, Germany
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