Institut des
NanoSciences de Paris
insp
Accueil > Evénements > Séminaires > Archives 2014 > Metal-Organics at Air-Wat
insp
2.jpg

Metal-Organics at Air-Water Interface - Smita Mukherjee - Vendredi 19 décembre 2014 - 13 h 30

INSP - 4 place Jussieu - 75252 PARIS Cedex 05 - Barre 22-12 - 4e étage, salle 426

Smita Mukherjee, post-doctorante - Equipe Physico-chimie et dynamique des interfaces, INSP

Metal-organic systems at air-water interface (Langmuir monolayers) have received wide attention in diverse areas. In this presentation, I discuss two different aspects of such systems (i) defect-free growth of metal-organics and (ii) creation of metal-organic nanostructures. (i)Potential applications of metal-organic systems are based on premises of perfect molecular layering and orientation (defect-free growth). In spite of attempts made to describe growth mechanism of such systems, interconnection between molecular structure and mesoscopic growth of these films is less understood. In an attempt to elucidate the same, structural and morphological aspects of metal-organic Langmuir monolayers and Langmuir-Blodgett films have been correlated with bonding information. More specifically, the role of coordinations and conformations of the headgroup in determining film growth at the mesoscopic scale have been highlighted. (ii) Metallic nano-objects are of great interest in the field of nanoscience. Their robust and functionalizable structure combined with interesting physical properties makes them ideal for fundamental research and applications. In this work, x-rays have been used in a special geometry (grazing incidence) in an attempt to create metal layers of controlled thickness of a few nanometers anchored to an organic monolayer by irradiating the latter deposited at the air-water interface (Langmuir monolayer). Through this new geometry, called `x-ray surface radiolysis’, we aimed to obtain metallic films and alloys oriented parallel to the air-water interface