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首页> 外文期刊>RSC Advances >Light trapping effect in plasmonic blockade at the interface of Fe3O4@Ag core/shell
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Light trapping effect in plasmonic blockade at the interface of Fe3O4@Ag core/shell

机译：FE3O4 @ AG核心/壳界面处等离子体封锁中的光诱捕效果

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摘要

Spherical isotropic magnetite (Fe3O4) nanoparticles were coated with a spherical isotropic Ag-shell in order to investigate the possibility of trapping photons through plasmon or plasmonic energy transfer enhancement at the magnetic-plasmonic interface coupling structure of core/shell. Our experimental results showed that: (1) the maximum broadening of optical absorption of Fe3O4 nanoparticles, as revealed by UV-Visible spectrophotometry, increases to a higher value due to the Ag shell thickness (7 nm), resulting in the decrease of saturation magnetization as measured with Vibrating Sample Magnetometer (VSM); (2) the measured saturation magnetization drops to a lower value as the maximum value of absorption shifts to a higher wavelength, because of the die out of two small peaks of Fe3O4 cited within 340-440 nm by the Ag plasmonic peak cited at 400 nm, which results in the shift; (3) the increased shouldering of absorption observed in UV-Visible spectrum decreases linearly by wavelength due to the increase of shell diameter, and ends to the initial maximum, which in turn results in the increase of saturation magnetization.
机译：球形各向同性磁铁矿（Fe3O4的）纳米粒子，以便调查在核/壳的磁等离子体激元接口耦合结构俘获通过等离子体或等离子体激元能量转移增强的光子的可能性涂覆有球形的各向同性的Ag-壳。我们的实验结果表明：（1）纳米Fe3O4的光吸收的最大展宽，通过紫外 - 可见分光光度法所揭示，增大到较高的值，由于银壳厚度（7纳米），导致饱和磁化强度的降低与振动样品磁强计（VSM）测得的; （2）测得的饱和磁化强度下降到一个较低的值作为吸收偏移到更高波长的最大值，这是因为模具出来的Fe3O4的两个小峰被Ag电浆峰340-440纳米内引用的引用在400nm处，这导致在移位; （3）增加了波长在紫外 - 可见光谱中观察到吸收的肩负线性减少由于壳直径的增大，并结束初始最大，这在饱和磁化强度的增加又导致。

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