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首页> 外文期刊>Crystal growth & design >Growth mechanism of layer-by-layer nanostructured gamma-NaxCO2O4 hexagonal crystals via a novel protein adsorption method
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Growth mechanism of layer-by-layer nanostructured gamma-NaxCO2O4 hexagonal crystals via a novel protein adsorption method

机译:新型蛋白质吸附方法形成层状纳米γ-NaxCO2O4六方晶体的生长机理

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摘要

Layer-by-layer nanostructured gamma-NaxCO2O4 hexagonal crystals have been synthesized by a novel protein adsorption method. The formation procedure of layer-by-layer nanostructured gamma-NaxCO2O4 crystals was investigated by powder X-ray diffraction (XRD), field emitted scanning electron microscopy (FESEM), and high-resolution electron microscopy (HREM). The growth mechanism of layer-by-layer nanostructured gamma-NaxCo2O4 crystals is related to the formation of colloidal precursor and the construction of the oriented layered structure. Ultrasound irradiation results in the formation of network structure colloidal precursor composed of bovine serum albumin (BSA), cobalt, and sodium sources due to the linking of BSA molecules as disulfide bonds and the electrostatic attraction forces. By a freeze-drying method, the oriented layered structure of precursor is obtained with the well-dispersed cobalt and sodium sources. At 800 degrees C, with the aid of an oriented layered structure, layer-by-layer nanostructured gamma-NaxCo2O4 hexagonal crystals are assembled by 15-30 nm nanoflaky hexagonal crystals along the perpendicular direction to the plane of nanoflaky hexagonal crystals.
机译:通过一种新型的蛋白质吸附方法,合成了层状纳米结构的γ-NaxCO2O4六角晶体。通过粉末X射线衍射(XRD),场发射扫描电子显微镜(FESEM)和高分辨率电子显微镜(HREM)研究了层状纳米结构γ-NaxCO2O4晶体的形成过程。层状纳米结构γ-NaxCo2O4晶体的生长机理与胶体前体的形成和取向层状结构的构建有关。超声波辐照导致牛血清白蛋白(BSA),钴和钠源组成的网络结构胶体前体的形成,这是由于BSA分子作为二硫键和静电引力的连接。通过冷冻干燥方法,利用分散良好的钴和钠源获得前体的定向层状结构。在800摄氏度下,借助于定向的层状结构,沿垂直于纳米片状六方晶体平面的方向,通过15-30 nm纳米片状六方晶体组装逐层纳米结构的γ-NaxCo2O4六角形晶体。

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