激光法连续制备荧光性的修饰纳米氧化锌有机溶胶及其PS杂化材料
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摘要
采用聚焦脉冲激光束轰击浸于含修饰剂流动液相中的氧化物固体靶的连续一步制备的新方法,将杂化材料的制备、原位修饰、组装和杂化一步连续完成,获得修饰性纳米氧化物乙醇溶胶和修饰性纳米氧化物/聚合物杂化溶胶,进而获得聚合物杂化薄膜材料,发现该聚合物杂化薄膜材料具有强的荧光特性,可在光致电致发光和LED上具有潜在的应用前景。
     本论文采用聚焦脉冲激光束轰击浸于含修饰剂流动液相中的ZnO固体靶,连续制备得到修饰纳米ZnO乙醇溶胶,修饰纳米ZnO/PS有机溶胶并由此获得修饰纳米ZnO/PS杂化薄膜。研究发现ZnO乙醇溶胶和杂化薄膜在紫外光的照射下能发射强的蓝光;ZnO的粒径分布为15~30 nm;ZnO/PS杂化薄膜的热稳定性较纯的PS薄膜有所提高。
     采用脉冲激光法分别制备得到发蓝光的修饰纳米ZnO有机溶胶、发绿光的修饰纳米Al_2O_3有机溶胶和发红光的修饰纳米Eu_2O_3有机溶胶,溶胶以一定的比例混合,得到修饰纳米氧化物混合有机溶胶,并由此获得修饰纳米氧化物/PS杂化薄膜。通过UV-Vis、TEM、TG-DSC、荧光光谱等对修饰纳米氧化物混合有机溶胶和修饰纳米氧化物/PS杂化薄膜的结构、基本性质和荧光特性进行表征,发现在一定波长的紫外光的激发下,混合有机溶胶和杂化薄膜能产生混合白光。
The preparation of hybrid material,decoration in situ,assembly and hybrid are one-step continuously completed by pulsed laser ablation.Decorated nano-oxide ethanol sols and decorated nano-oxide/polymer organic sols are successively produced by pulsed laser ablation at the interface of oxide target submerged in the flowing liquid which contained modification agents.Then decorated nano-oxide/polymer hybrid thin films are obtained.It is found that the nano-oxide/polymer hybrid thin films radiate high fluorescence,which may be applied in LED in future.
     In this paper,decorated nano-ZnO ethanol sols and decorated nano ZnO/PS organic sols which were modified in situ were successively produced by pulsed laser ablation at the interface of ZnO target submerged in the flowing liquid which contained modification agents.Then decorated nano ZnO/PS hybrid thin films were obtained.It was found that Decorated nano-ZnO ethanol sols and decorated nano ZnO/PS hybrid thin films radiated intense blue light under ultraviolet radiation.TEM showed that the size of the nano ZnO particles distributed between 15 nm and 30 nm.TG-DSC revealed that the heat resistance of decorated nano ZnO/PS hybrid thin flims increased.
     Decorated nano-ZnO organic sols,decorated nano-Al_2O_3 organic sols and decorated nano-Eu_2O_3 organic sols were successively produced by pulsed laser ablation.Decorated nano-oxide mixed organic sols were obtained by mixing the three sols,then decorated nano-oxide/PS hybrid thin films were produced.The organic sols and hybrid thin films were investigated by TEM,UV-Vis,TG-DSC and fluorescence spectrum.It was found that the organic sols and hybrid thin films can radiate white light under ultraviolet radiation.
引文
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