Sub-100 nanometer silver doped gold-cysteine supramolecular assemblies with enhanced nonlinear optical properties.
作者： Hussein Fakhouri , Martina Perić , Franck Bertorelle , Philippe Dugourd , Xavier Dagany
DOI: 10.1039/C9CP00829B
关键词: Nanomaterials 、 Excited state 、 Nanoparticle 、 Absorption (electromagnetic radiation) 、 Doping 、 Nanometre 、 Supramolecular chemistry 、 Nanotechnology 、 Characterization (materials science) 、 Materials science
摘要: The ability of gold(I) thiolates to self-assemble into supramolecular architectures opens the route for a new class nanomaterials with unique structure–optical property relationship. However, confirmed relationship, control is required. In this work, we report simple synthesis sub-100 nanometer gold–cysteine and silver doped assemblies. We explore in particular silver-doping as strategy enhance optical properties these By an accurate characterization as-synthesized nanoparticles, have been able measure first time, their absolute two-photon absorption cross-section, excited fluorescence cross-section hyperpolarizabilities at different near-IR wavelengths. Huge values are obtained assemblies, compared corresponding undoped counterpart. addition, employ DFT TD-DFT methods study geometric electronic structures model compounds order address structure−linear/nonlinear aim gain insights origin nonlinear enhancement silver-doped gold
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