Gold Nanoparticles for Physics, Chemistry, Biology and Medicine

Sylvie Marguet (1) , Khaywah Mohammad (1) , Jérôme Caron (1) , Habert Aurélie (1)

1 LEDNA - Laboratoire Edifices Nanométriques

The illumination of gold nanoparticles (Au-NPs) sets off a cascade of complex processes that are morphology dependent and lead them to act as nanosources of light, heat and hot-carriers. Our research activities concentrate on the synthesis and assembly of gold NPs and nanohybrids with tunable sizes and shapes, to provide original materials for research in plasmonics (1-7), plasmon-driven chemistry, biology and medicine through collaborations. We synthesize commercial and non-commercial Au-NPs such as cubes, prisms, stars, octahedra, nano/microplates, of various sizes and thicknesses and ultra-small nanorods. Hot-spots are prepared through spontaneous 3D self-assembly, by simply evaporating concentrated monodisperse solutions on non-patterned substrates. According to literature, perfect spheres and cubes on top of Au-film are very attractive for several spectroscopies within the gap. Triangular shaped NPs are particularly promising for ultrasensitive sensing and biomedicine. Au-NPs alone without photosensitizer can generate singlet oxygen (1Oz) for PDT. Hot spots coming from Au-NPs or aggregates on Au-mirror are currently used to study a large number of plasmon-driven chemical reactions. Nano-and microplates can spontaneously self-assemble in ordered LD-columnar aggregates or 2D-metasurfaces; their large atomically flat facets are used for F.l.B. fabrication of monocrysta lline structures.

Domaines: Matériaux

Sylvie Marguet, Khaywah Mohammad, Jérôme Caron, Habert Aurélie. Gold Nanoparticles for Physics, Chemistry, Biology and Medicine. GdR Or-Nano, Jun 2017, Nancy, France. 2, 2017. ⟨cea-02327834⟩