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近年来,含有五元环排列结构的PtP2单晶和二维材料因具有丰富的物理和化学性能而得到广泛关注,有望应用于高性能电子和光电子器件.本文通过优化Pt和P的初始摩尔比,采用助溶剂法制备了高质量的PtP2单晶,并在PtP2单晶中首次发现了三维弱局域化和负磁阻效应.晶体结构、磁性和光谱测试表明,PtP2单晶中的少量缺陷可抑制负磁阻效应和磁有序态.本文提出了合成高质量贵金属磷化物单晶的有效方法,为研究磷化物中多种关联电子态提供了新的平台. 相似文献
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电化学沉积制备半导体CuInSe2薄膜 总被引:3,自引:0,他引:3
本文报道恒电位法在pH为1.35的Cu2SO4、SeO2、In2(SO4)3溶液中,在Ti电极上电化学沉积制备CuInSe2纳米薄膜。研究络合剂柠檬酸和酒石酸对制备CuInSe2纳米薄膜的影响。扫描电子显微镜(SEM)结果表明,加入络合剂后,电化学沉积的薄膜表面颗粒分布更均匀、致密。X射线衍射(XRD)分析显示,制备的CuInSe2薄膜是黄铜矿和闪锌矿相的混合物,添加柠檬酸和酒石酸后,衍射峰增强,晶形变好,制备的薄膜颗粒尺寸大小在250nm左右,造成粒度增大的原因是由于颗粒的团聚作用。 相似文献
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Controlled synthesis of highly ordered CuO nanowire arrays by template-based sol-gel route 总被引:1,自引:0,他引:1
The highly ordered CuO nanowire arrays of composite-oxides were synthesized within a porous anodic aluminum oxide(AAO) template by a citrate-based sol-gel route. A vacuum system was applied to draw the gel into the template pores, which conquers the only driving force of this technique-capillary action, then the gel was thermally treated to prepare desired CuO nanowires. The results of scanning electron microscopy(SEM) indicate that the CuO nanowires are very uniformly assembled and parallel to each other in the pores of the anodic aluminum oxide(AAO) template membranes. The results of X-ray diffraction(XRD) and the selected-area electron diffraction(SAED) indicate that the CuO nanowires are monoclinic-type crystalline structure. Furthermore, X-ray photoelectron spectroscopy (XPS) demonstrates that the stoichiometric CuO is formed. 相似文献
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