The spontaneous self-organization of dissimilar ligands on the surface of metal nanoparticles is a very appealing approach to obtain anisotropic "spherical" systems. In addition to differences in ligand length and end groups, a further thermodynamic driving force to control the self-assembled monolayer organization may become available if the ligands are inherently immiscible, as is the case of hydrogenated (H-) and fluorinated (F-) species. Here, we validate the viability of this approach by combining (19)F NMR experiments and multiscale molecular simulations on large sets of mixed-monolayer-protected gold nanoparticles (NPs). The phase segregation of blends of F- and H-thiolates grafted on the surface of gold NPs allows a straightforward approach to patterned mixed monolayers, with the shapes of the monolayer domains being encoded in the structure of the F/H-thiolate ligands. The results obtained from this comprehensive study offer molecular design rules to achieve a precise control of inorganic nanoparticles protected by specifically patterned monolayers.

Patchy and Janus Nanoparticles by Self-Organization of Mixtures of Fluorinated and Hydrogenated Alkanethiolates on the Surface of a Gold Core

SOLOGAN, MARIA;MARSON, DOMENICO;Pengo, Paolo;BOCCARDO, SILVIA;PRICL, SABRINA;POSOCCO, PAOLA;PASQUATO, LUCIA
2016

Abstract

The spontaneous self-organization of dissimilar ligands on the surface of metal nanoparticles is a very appealing approach to obtain anisotropic "spherical" systems. In addition to differences in ligand length and end groups, a further thermodynamic driving force to control the self-assembled monolayer organization may become available if the ligands are inherently immiscible, as is the case of hydrogenated (H-) and fluorinated (F-) species. Here, we validate the viability of this approach by combining (19)F NMR experiments and multiscale molecular simulations on large sets of mixed-monolayer-protected gold nanoparticles (NPs). The phase segregation of blends of F- and H-thiolates grafted on the surface of gold NPs allows a straightforward approach to patterned mixed monolayers, with the shapes of the monolayer domains being encoded in the structure of the F/H-thiolate ligands. The results obtained from this comprehensive study offer molecular design rules to achieve a precise control of inorganic nanoparticles protected by specifically patterned monolayers.
Pubblicato
http://pubs.acs.org/doi/suppl/10.1021/acsnano.6b03931
File in questo prodotto:
File Dimensione Formato  
2016 ACS Nano.pdf

non disponibili

Descrizione: Printed paper
Tipologia: Documento in Versione Editoriale
Licenza: Digital Rights Management non definito
Dimensione 6.72 MB
Formato Adobe PDF
6.72 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
2016 ACS Nano_SI.pdf

non disponibili

Descrizione: Supporting Information
Tipologia: Altro materiale allegato
Licenza: Digital Rights Management non definito
Dimensione 2.17 MB
Formato Adobe PDF
2.17 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Manuscript_Revised_2.pdf

accesso aperto

Tipologia: Bozza finale post-referaggio (post-print)
Licenza: Digital Rights Management non definito
Dimensione 1.49 MB
Formato Adobe PDF
1.49 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/2884418
Citazioni
  • ???jsp.display-item.citation.pmc??? 6
  • Scopus 43
  • ???jsp.display-item.citation.isi??? 45
social impact