Gold nanoparticles

What makes gold nanoparticles so special for nanoscience and nanotechnology?

[These sections were not translated into English. Answers are in French below...]

La réponse réside dans les propriétés tout-à-fait étonnantes de l’or lorsqu’il est sous forme de particules de taille nanométrique, c'est à dire inférieures à 100 nanomètres : propriétés chimiques, optiques, électronique. Les retombées des travaux de recherche sur nanoparticules d'or concernent des domaines très variés : la conception de nouveaux nanomatériaux, la nano-électronique et les technologies de l’information, la catalyse, les bio-capteurs, la thérapie, le diagnostic et la pharmacologie. Elles apportent aussi de nouvelles solutions dans le traitement de problèmes environnementaux avec la catalyse

Cette section propose un aperçu sur les diverses propriétés et les applications des nanoparticules d'or.

What are gold nanoparticles?

Gold nanoparticles are assemblies of a few atoms up to several thousands of them, with sizes ranging from 1 to 100nm.

What are gold nanoparticles?

Synthesis and functionalization

Properties of gold nanoparticles are tightly linked to their shape, size, crystalline defects to the nature of their surface. This is essential to reach a perfect control of the synthesis process in order to adjust these parameters.

Synthesis and functionalization

Catalysis and reactivity

The chemical reactivity of gold nanoparticles and their ability of adsorbing molecules are directly linked to their surface and in particular to the precise arrangement of the surface atoms.

Catalysis and reactivity

Theory and numerical models

Gold nanoparticles are ideal nano-objects for comparing theoretical models and experimental results.

Theory and numerical models

Plasmonics

Plasmonincs stands at the frontier between optics and condensed matter physics. It describes the delicate phenomena at play when electrons are collectively excited by electromagnetic waves. This leads to nano-optics with applications for biosensors, medical treatments.

Plasmonics

Nanoelectronics

Nanoelectronics focuses on the fundamental understanding of the electric conduction through nano-sized metalltic conductors, or at the interface of nanoconductor and moleculars layers. Gold nanoparticles are peculiar objects since they hardly oxidized and maintain their metallic and conductive behavior.

Nanoelectronics

Gold nanoparticles for health

Gold nanoparticles are used in biology for imaging and for diagnostics. They can also vectorize drugs towards diseased cells. In conjunction with their plasmonic properties they are used in photothermal therapy.

Gold nanoparticles for health