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首页> 外文期刊>Journal of nano research >Enhanced Blue Green Emission of ZnO Nanorods Grown by Hydrothermal Method
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Enhanced Blue Green Emission of ZnO Nanorods Grown by Hydrothermal Method

机译：水热法生长ZnO纳米棒的增强蓝绿色发射

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摘要

In this paper, we report enhanced blue green emission of hexagonal shaped ZnO nanorods (NRS) grown via a simple hydrothermal method and silica coated then by using tetraethoxysilane (TEOS). The composition and structural characteristic of the prepared samples were studied by X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy and Energy Dispersive X-ray analysis (FESEM-EDAX). The results revealed well crystallized hexagonal structure possessing a perfect and ideal growth habits of wurtzite zinc oxide grown along the [001] direction in preference in both the cases. Optical properties and quality of the prepared ZnO and silica coated ZnO nanorods were examined by UV-visible and FTIR spectroscopy. Photoluminescence (PL) spectra were used to study ZnO and silica coated ZnO nanorod electronic structure, which resulted in an obvious enhanced blue-green emission for ZnO nanorod and an intense red emission with a very low UV intensity for the silica coated nanorods. Appearance of intense red emission seems to be very promising since and it could favor more reliable fluorescence sensing in drug delivery fluorescent detection with a minor UV emission.
机译：在本文中，我们报告了通过简单的水热法生长并随后使用四乙氧基硅烷（TEOS）涂覆二氧化硅的六角形ZnO纳米棒（NRS）的蓝绿色发射增强。通过X射线衍射（XRD），场发射扫描电子显微镜和能量色散X射线分析（FESEM-EDAX）研究了所制备样品的组成和结构特征。结果表明，在两种情况下均优先沿[001]方向生长的纤锌矿型氧化锌具有良好和理想的生长习惯，结晶良好的六角形结构。通过紫外可见和FTIR光谱检查制备的ZnO和二氧化硅包覆的ZnO纳米棒的光学性质和质量。使用光致发光（PL）光谱研究了ZnO和二氧化硅涂覆的ZnO纳米棒的电子结构，这导致ZnO纳米棒的蓝绿色发射明显增强，而二氧化硅涂覆的纳米棒的紫外发射强度很低，产生了强烈的红色发射。强烈的红色发射的出现似乎非常有希望，因为它可能有利于在药物发射荧光检测中以较小的UV发射实现更可靠的荧光传感。

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