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首页> 外文期刊>Optical Materials >Magnetic-field tunability of optical properties in colloidal suspensions of goethite (α-FeOOH) nanorods
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Magnetic-field tunability of optical properties in colloidal suspensions of goethite (α-FeOOH) nanorods

机译:针铁矿(α-FeO​​OH)纳米棒胶体悬浮液中光学性质的磁场可调性

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摘要

The dependence of polarized optical properties of colloidal suspensions of goethite (alpha-FeOOH) nanorods in water and PAO base fluids under the action of an applied magnetic field are investigated in the ultraviolet, visible and near infrared from 300 to 1500 nm wavelength. We found that the transmittance in the NIR range can be tuned by changing magnetic field direction and strength. Moreover, we found that the magnetic field dependence of optical properties is strongly connected to the base fluid where magnetic nanoparticles are suspended. The obtained results show that the optical properties of goethite-based suspensions are very sensitive to even weak external magnetic fields, with promising perspectives for sensing applications.
机译:在300到1500 nm波长的紫外线,可见光和近红外光下,研究了针铁矿(α-FeO​​OH)纳米棒在水和PAO基液中胶体悬浮液在施加磁场的作用下的偏振光学特性的依赖性。我们发现可以通过改变磁场方向和强度来调节近红外范围内的透射率。此外,我们发现光学性质对磁场的依赖性与悬浮磁性纳米粒子的基础流体紧密相关。所得结果表明,针铁矿基悬浮液的光学特性对微弱的外部磁场非常敏感,在传感应用方面具有广阔的前景。

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