Cu/PAA纳米复合结构的制备与偏振特性研究

Study of Preparation and Polarization Property of Cu/PAA Nanocomposite Systems

通过改变二次氧化过程中的氧化电压,制备了不同孔径的多孔Al(PAA)模板;采用交流电沉积的方法,制备了含Cu阳极PAA膜。X射线衍射(XRD)分析表明,阳极PAA膜上确有Cu生成;扫描电镜(SEM)显示,Cu纳米线粗细均匀,具有很好的线栅结构。Cu/PAA复合膜的透射光谱及偏振光谱表明:这种含Cu纳米线PAA膜在近红外光区有较好的透射率和消光比,且随着膜板孔径(Cu纳米线直径)的增加,样品的透射率下降而其消光比却明显提高。因此,可以通过优化模板参数,制备出实用的Cu/PAA偏振器。

Porous alumina templates with different apertures were fabricated by changing the oxidation voltage in two-step anodic oxidation,and then Cu nanowires were synthesized in porous alumina by the alternating current electrochemical deposition method. The Cu/PAA was analyzed by SEM and XRD,the results have shown that Cu nanowires were indeed synthesized in porous alumina which had the same diameter and good structure of wire grating. And the transmission and polarization spectra have indicated that such a micropolarizer of porous alumina film with Cu nanowires has better transmittance and extinction ratio in the near infrared region with the increase of the aperature of PAA （the diameter of Cu nanowires） ,the transmission of the samples has decreased,however,the extinction ratio can be obviously improved. Through analyzing this phenomenon,we can obtain the Cu/PAA micmpolarizers of higher efficiency by optimizing the parameters of the templat.