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Silicon dioxide covered Au and Ag nanoparticles for shell-isolated nanoparticle enhanced spectroscopies in the near-infrared

机译:二氧化硅覆盖的Au和Ag纳米颗粒用于近红外光谱中的壳分离纳米颗粒增强的光谱学

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摘要

The present work reports the extension of the SHINERS and SHINEF (shell-isolated nanoparticles enhanced Raman scattering, and fluorescence, respectively) effects into the near-infrared excitation, at 1064 nm and 785 nm, respectively. Plasmon enhanced effects were obtained for the SHIN Au@SiO2 and Ag@SiO2 nanoparticles. The overall SHINERS performance of both SHIN in the presence of the probe dye IR-820 is considerably lower than for the visible region of the spectra, and the conjunction to the IR-820 dye has been essential for the observation of SHINERS. The SHINEF performance for both SHIN excited at 785 nm is quite similar; this similarity is assigned to the similar values of quality factor for the two coinage metals in that region of the electromagnetic spectrum.
机译:本工作报告了将SHINERS和SHINEF(壳分离的纳米颗粒分别增强了拉曼散射和荧光)效应扩展到了分别在1064 nm和785 nm处的近红外激发。 SHIN Au @ SiO2和Ag @ SiO2纳米粒子具有等离子增强效果。在存在探针染料IR-820的情况下,两种SHIN的整体SHINERS性能都明显低于光谱的可见光区域,并且与IR-820染料的结合对于观察SHINERS至关重要。两种在785 nm激发的SHIN的SHINEF性能都非常相似。在电磁频谱的该区域中,将这种相似度分配给两种造币金属的品质因数的相似值。

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