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首页> 外文期刊>Studia Universitatis Babes-Bolyai. Series Physica >FORMATION OF GOLD NANOPARTICLE AGGREGATES BY CHEMICAL CROSS-LINKING: UV-VISIBLE SPECTROSCOPY AND SURFACE-ENHANCED RAMAN SCATTERING STUDIES
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FORMATION OF GOLD NANOPARTICLE AGGREGATES BY CHEMICAL CROSS-LINKING: UV-VISIBLE SPECTROSCOPY AND SURFACE-ENHANCED RAMAN SCATTERING STUDIES

机译：化学交联形成金纳米颗粒团聚物：紫外可见光谱和表面增强拉曼散射研究

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摘要

Gold has a high affinity to thiol groups (SH) in molecules, leading to the formation of molecular self-assembled layers on the metal surface. In this study, we investigate by UV-visible spectroscopy the modification of optical properties of gold nanoparticle (GNPs) as result of their cross-linking induced by chemical interaction with a dithiolated, bifunctional molecule, here 1,3-propanedithiol (1,3-PDT). The chemical binding of GNPs via 1,3-PDT and formation of molecular layers on gold surface was studied by Surface-Enhanced Raman Scattering (SERS). Correlations between plasmons resonances and nanometer-scale morphology were devised by atomic force microscopy (AFM). The cross-linking of nanoparticles is an important step toward developing plasmonic substrate for biosensing based on metallic networks and nanowires.
机译：金对分子中的巯基（SH）具有高亲和力，从而导致在金属表面形成分子自组装层。在这项研究中，我们通过紫外-可见光谱研究了金纳米颗粒（GNP）的光学特性的修饰，这是由于其与二硫代双功能分子（此处为1,3-丙二酚（1,3 -太平洋夏令时）。通过表面增强拉曼散射（SERS）研究了GNPs通过1,3-PDT的化学结合以及在金表面形成分子层。通过原子力显微镜（AFM）设计了等离激元共振与纳米级形态之间的关系。纳米粒子的交联是迈向基于金属网络和纳米线开发用于生物传感的等离激元基板的重要一步。

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