In situ formation of electronically coupled superlattices of Cu1.1S nanodiscs at the liquid/air interface.
Chem Commun (Camb)
; 55(33): 4805-4808, 2019 Apr 18.
Article
en En
| MEDLINE
| ID: mdl-30946404
ABSTRACT
We report on the in situ monitoring of the formation of conductive superlattices of Cu1.1S nanodiscs via cross-linking with semiconducting cobalt 4,4',4'',4'''-tetraaminophthalocyanine (CoTAPc) molecules at the liquid/air interface by real-time grazing incidence small angle X-ray scattering (GISAXS). We determine the structure, symmetry and lattice parameters of the superlattices, formed during solvent evaporation and ligand exchange on the self-assembled nanodiscs. Cu1.1S nanodiscs self-assemble into a two-dimensional hexagonal superlattice with a minor in-plane contraction (â¼0.2 nm) in the lattice parameter. A continuous contraction of the superlattice has been observed during ligand exchange, preserving the initial hexagonal symmetry. We estimate a resultant decrement of about 5% in the in-plane lattice parameters. The contraction is attributed to the continuous replacement of the native oleylamine surface ligands with rigid CoTAPc. The successful cross-linking of the nanodiscs is manifested in terms of the high electrical conductivity observed in the superlattices. This finding provides a convenient platform to understand the correlation between the structure and transport of the coupled superstructures of organic and inorganic nanocrystals of anisotropic shape.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Chem Commun (Camb)
Asunto de la revista:
QUIMICA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Alemania