SERS active Ag-SiO2 nanoparticles obtained by laser ablation of silver in colloidal silica

被引：11

作者：

Gellini, Cristina ^{[1
]}

Muniz-Miranda, Francesco ^{[2
,3
]}

Pedone, Alfonso ^{[2
]}

Muniz-Miranda, Maurizio ^{[1
]}

机构：

[1] Univ Florence, Dept Chem Ugo Schiff, Via Lastruccia 3, I-50019 Sesto Fiorentino, Italy

[2] Univ Modena & Reggio Emilia, Dept Chem & Geol Sci, Via Campi 103, I-41125 Modena, Italy

[3] Univ Ghent, Ctr Mol Modeling, Technol Pk 903, B-9052 Zwijnaarde, Belgium

来源：

BEILSTEIN JOURNAL OF NANOTECHNOLOGY | 2018年 / 9卷

关键词：

2,2 '-bipyridine; DFT; laser ablation; silica; silver; ENHANCED RAMAN-SCATTERING; EFFECTIVE CORE POTENTIALS; MOLECULAR CALCULATIONS; AG-AT-SIO2; NANOPARTICLES; DOPED SILICA; THIN-FILMS; SURFACE; IONS; AU-AT-SIO2; MECHANISM;

D O I：

10.3762/bjnano.9.224

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Highly stable Ag-SiO2 nanoparticle composites were first obtained by laser ablation of a silver target in an aqueous colloidal dispersion of silica and examined by UV-vis absorption spectroscopy, transmission electron microscopy and Raman spectroscopy. The surface enhanced Raman scattering (SERS) activity of these nanocomposites was tested using 2,2'-bipyridine as a molecular reporter and excitation in the visible and near-IR spectral regions. The computational DFT approach provided evidence of ligand adsorption on positively charged adatoms of the silver nanostructured surface, in a very similar way to the metal/molecule interaction occurring in the corresponding Ag(I) coordination compound.

引用

页码：2396 / 2404

页数：9

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