Synthesis and microstructural analysis of benzylthiol-functionalized Au nanocrystals

TitleSynthesis and microstructural analysis of benzylthiol-functionalized Au nanocrystals
Publication TypePresentazione a Congresso
Year of Publication2007
AuthorsVitale, F., Mirenghi L., Piscopiello E., Protopapa Maria Lucia, Tapfer L., Giannini C., Guagliardi A., Cervellino A., Pellegrini G., Trave E., Mattei G., Mazzoldi P., Fratoddi D., and Russo M.V.
Conference NameMaterials Research Society Symposium Proceedings
Conference LocationBoston, MA
KeywordsCrystal structure, Emission lines, Functional groups, Gold, Gold Nanoparticles, Microanalytical analysis, Microstructural analysis, Microstructural evolution, Nanocrystals, Synthesis (chemical), X ray powder diffraction

We report on the synthesis and microstructural and microanalytical analysis of dodecanethiol and benzylthiol-stabilized Au nanoparticles (diameter range between 2 nm and 10 nm). Stable functionalized gold nanoparticles were synthesized by using two different routes: a two-phase liquid-liquid method and a one-phase method. The size, strain, shape and crystalline structure of the nanocrystals were determined by a full-pattern X-ray powder diffraction analysis and high-resolution electron microscopy. The chemical environment of the Au nanocrystals and their interaction with the thiols was investigated by X-ray photoelectron spectroscopy. Photoluminescence spectroscopy measurements show a characteristic IR emission at γ=960 nm of small sized Au nanocrystals (∼3 nm). The origin of this IR emission line seems to be correlated to the Au-S bonding and the size of the nanoparticles. © 2007 Materials Research Society.