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首页> 外文期刊>RSC Advances >A straightforward and 'green' solvothermal synthesis of Al doped zinc oxide plasmonic nanocrystals and piezoresistive elastomer nanocomposite
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A straightforward and 'green' solvothermal synthesis of Al doped zinc oxide plasmonic nanocrystals and piezoresistive elastomer nanocomposite

机译：Al掺杂的氧化锌等离子体纳米晶体和压阻弹性体纳米复合物的直接和“绿色”溶剂热合成

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摘要

Plasmonic oxide nanocrystals hold great promise in a wide range of applications, for which the availability of scalable and "green" synthesis methods is prerequisite, whereas until recently an excellent response has been demonstrated only for samples prepared through intricate synthesis paths. We report here a simple ethanol solvothermal synthesis route of Al doped ZnO plasmonic nanocrystals (Zn1-xAlxO) at doping levels of x up to 0.15. The obtained Al doped ZnO samples consisted of nanoparticles and short nanorods with a diameter of around 10 nm at x = 0.15 doping level while reaching aspect ratio levels of 50 for lower doping levels. Detailed structural studies using powder X-ray diffraction Rietveld refinement, X-ray absorption and photoelectron spectroscopies show that all samples maintain the structure of the phase-pure zincite with the space group P6(3)mc. The resulting powders exhibit strong infrared absorption while remaining largely transparent for visible light, enabling the preparation of transparent colloidal dispersions. Furthermore, as a test of applicability in a practical device, the nanocrystals were used to prepare transparent piezoresistive Zn0.925Al0.075O-polydimethylsiloxane composites. The prepared sensor material exhibits excellent repeatable and reproducible piezoresistive behaviour.
机译：氧化等离子体纳米晶体在广泛的应用中具有广阔的前景，为此必须具备可扩展的“绿色”合成方法，而直到最近，仅通过复杂的合成途径制备的样品才显示出优异的响应。我们在这里报告Al掺杂的ZnO等离子体纳米晶体（Zn1-xAlxO）的x掺杂水平最高为0.15的简单乙醇溶剂热合成路线。获得的Al掺杂的ZnO样品由纳米粒子和短纳米棒组成，在x = 0.15的掺杂水平下直径约为10 nm，而对于较低的掺杂水平则达到50的长宽比水平。使用粉末X射线衍射Rietveld精修，X射线吸收和光电子能谱进行的详细结构研究表明，所有样品都保持了空间群P6（3）mc的纯相锌酸盐的结构。所得粉末显示出强的红外吸收性，同时对可见光保持很大程度上透明，从而能够制备透明的胶态分散体。此外，作为在实际设备中的适用性测试，使用纳米晶体制备透明的压阻Zn0.925Al0.075O-聚二甲基硅氧烷复合材料。所制备的传感器材料表现出优异的可重复性和可再现性的压阻性能。

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