Investigation of passivated silver nanoparticles
2001; Elsevier BV; Volume: 343; Issue: 1-2 Linguagem: Inglês
10.1016/s0009-2614(01)00566-8
ISSN1873-4448
AutoresShengtai He, Jiannian Yao, Sishen Xie, Shijin Pang, Hongjun Gao,
Tópico(s)Molecular Junctions and Nanostructures
ResumoTwo-dimension self-assembly superlattices of passivated silver nanoparticles were formed on amorphous carbon films. Transmission electron microscopy (TEM) of the silver nanoparticles indicates that the particle formation involves a dynamic process. In X-ray photoelectron spectroscopy (XPS) spectra, the Ag3d5/2 value decreases first from 368.3 to 367.95 eV, and then to 367.65 eV during the formation, which indicates that the 1-nonanethiol is just physically adsorbed on the surface of the nanoparticles at the beginning of the reaction. Subsequently, the chemical bond was formed between the Ag atoms and S ions, which further demonstrated that the large particles were decomposed into smaller ones in the middle of the particle formation process.
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