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Directed Self-Assembly of Plasmonic Colloids - Luis M. Liz-Marzán

Espagne


LPS Bât 510 - Grand Amphi

The assembly of nanoparticle building blocks can be exploited toward the amplification of the properties of the components and/or the generation of new features unique to the ensemble. A wide variety of external stimuli can be employed to direct the assembly of nanoparticles, including temperature, light, complexing ions, solvent polarity, electric and magnetic fields, etc. In the particular case of plasmonic nanoparticles, the directed self-assembly within colloids can be exploited to generate novel optical properties. Even though, nanoparticles employed for these assemblies are usually spherical and lack a geometrical preference toward directional self-assembly, controlled self-assembly of non-spherical nanoparticles, such as gold nanorods, enables these arrays to form defined 1D, 2D or 3D structures with a vectorial dependence of the desired properties. Additionally, combination of plasmonic nanoparticles with other materials can be exploited to generate multifunctional colloids, with increased potential toward applications. We show in this lecture several examples where various external stimuli are applied toward the assembly of gold nanoparticles with different morphologies, leading to a variety of nanostructures with interesting properties.

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