Jump to main content
Jump to site search


Hybrid gold nanoparticle–quantum dot self-assembled nanostructures driven by complementary artificial proteins

Author affiliations

Abstract

Hybrid nanostructures are constructed by the direct coupling of fluorescent quantum dots and plasmonic gold nanoparticles. Self-assembly is directed by the strong affinity between two artificial α-repeat proteins that are introduced in the capping layers of the nanoparticles at a controlled surface density. The proteins have been engineered to exhibit a high mutual affinity, corresponding to a dissociation constant in the nanomolar range, towards the protein-functionalized quantum dots and gold nanoparticles. Protein-mediated self-assembly is evidenced by surface plasmon resonance and gel electrophoresis. The size and the structure of colloidal superstructures of complementary nanoparticles are analyzed by transmission electron microscopy and small angle X-ray scattering. The size of the superstructures is determined by the number of proteins per nanoparticle. The well-defined geometry of the rigid protein complex sets a highly uniform interparticle distance of 8 nm that affects the emission properties of the quantum dots in the hybrid ensembles. Our results open the route to the design of hybrid emitter−plasmon colloidal assemblies with controlled near-field coupling and better optical response.

Graphical abstract: Hybrid gold nanoparticle–quantum dot self-assembled nanostructures driven by complementary artificial proteins

Back to tab navigation

Supplementary files

Article information


Submitted
23 Nov 2019
Accepted
29 Jan 2020
First published
31 Jan 2020

Nanoscale, 2020, Advance Article
Article type
Paper

Hybrid gold nanoparticle–quantum dot self-assembled nanostructures driven by complementary artificial proteins

M. Fernandez, A. Urvoas, P. Even-Hernandez, A. Burel, C. Mériadec, F. Artzner, T. Bouceba, P. Minard, E. Dujardin and V. Marchi, Nanoscale, 2020, Advance Article , DOI: 10.1039/C9NR09987E

Social activity

Search articles by author

Spotlight

Advertisements