|Title||Synthesis and microstructural analysis of benzylthiol-functionalized Au nanocrystals|
|Publication Type||Presentazione a Congresso|
|Year of Publication||2007|
|Authors||Vitale, 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 Name||Materials Research Society Symposium Proceedings|
|Conference Location||Boston, MA|
|Keywords||Crystal 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.