Observation of Sulfur on the Surface of Giant Aurothiol Nanoclusters
Abstract:We report the study of aurothiol nanoclusters using high-resolution electron microscopy, energy loss spectroscopy, X-ray photoelectron spectroscopy, Auger spectroscopy, and microscopy. It is concluded that the sulfur atoms are located on the surface of the gold nanoparticles in both (100) and (111) microfacets. The X-ray photoelectron spectroscopy data show that there is a Au-Au bond as well as a Au-S bond. Auger depth profile measurements made by sputtering of the nanoparticles corroborates that the sulfur is located on the surface of the nanoparticle. Quantitative Auger analysis indicates a ratio Au/S between ≈1.79 and 1.98.
Document Type: Research Article
Affiliations: 1: ININ, Km 36.5 Carr. Mexico-Toluca; Ocoyoacac, Estado de México 52045, Mexico; Facultad de Quimica, UNAM, México, D.F. 04510, Mexico 2: ININ, Km 36.5 Carr. Mexico-Toluca; Ocoyoacac, Estado de México 52045, Mexico 3: Centro de Ciencias de la Materia Condensada, UNAM
Publication date: 2002-02-01
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