Institut für Anorganische Chemie, Karlsruhe Institute of Technology, Engesserstraße 15, D-76131, Karlsruhe, Germany.
Nanoscale. 2011 Jun;3(6):2544-51. doi: 10.1039/c1nr10076a. Epub 2011 May 9.
Covellite (CuS), digenite (Cu(1.8)S) and chalcocite (Cu(2)S) are prepared as nanoscaled hollow spheres by reaction at the liquid-to-liquid phase boundary of a w/o-microemulsion. According to electron microscopy (SEM, STEM, TEM, HRTEM) the hollow spheres exhibit an outer diameter of 32-36 nm, a wall thickness of 8-12 nm and an inner cavity of 8-16 nm in diameter. The phase composition is determined based on HRTEM, electron-energy loss spectroscopy, X-ray powder diffraction and thermal analysis. In face of the advanced morphology of the hollow spheres, precise control of its phase composition is nevertheless possible by adjusting the experimental conditions (i.e. type and concentration of the copper precursor, concentration of ammonia inside of the micelle). Such phase-engineering of nanoscale hollow spheres is firstly observed and might allow adjusting even further compositions/structures as well as tailoring of phase-specific properties in the future.
蓝辉铜矿 (CuS)、硫镍铜矿 (Cu(1.8)S) 和辉铜矿 (Cu(2)S) 通过在油包水微乳液的液-液界面反应制备成纳米级空心球。根据电子显微镜 (SEM、STEM、TEM、HRTEM)，空心球的外径为 32-36nm，壁厚为 8-12nm，内径为 8-16nm。通过高分辨率透射电子显微镜、电子能量损失谱、X 射线粉末衍射和热分析确定了其相组成。面对空心球的先进形态，通过调整实验条件（即铜前体的类型和浓度、胶束内氨的浓度），仍然可以精确控制其相组成。这种纳米级空心球的相工程首先被观察到，未来可能允许进一步调整组成/结构以及针对特定相的特性进行定制。
