【摘要】 采用分子束外延法在Pt(111)单晶表面上制备有序的ZrO2(111)薄膜,利用低能电子衍射谱、同步辐射光电子能谱和X射线光电子能谱研究了Cu纳米颗粒在ZrO2(111)薄膜表面的生长模式和界面相互作用.结果表明,室温下Cu先以二维模式生长到0.15单层(ML),接着以三维模式生长.随着Cu覆盖度的减小,Cu2p3/2峰逐渐向高结合能位移,可归因于初态效应和终态效应共同作用的结果.Cu最初沉积到ZrO2表面时,两者间存在较强的相互作用,Cu向ZrO2衬底传递电荷,以Cu(Ⅰ)形式出现.当Cu覆盖度增加到1ML以后,Cu开始表现出金属特征.更多还原

【Abstract】 The growth mode and interfacial interaction of Cu nanoparticles on the ordered ZrO2(111) thin film surfaces have been studied by low energy electron diffraction,synchrotron radiation photoemission spectroscopy,and X-ray photoelectron spectroscopy.The ZrO2(111) thin film was grown on Pt(111) using the molecular beam epitaxy technique.At room temperature,copper initially grows two-dimensionally on the ZrO2(111) thin film up to 0.15 monolayer(ML),followed by three-dimensional islanding.The binding energy of Cu 2p3/2 increases with decreasing the Cu coverage,owing to the contribution from both the initial-state and final-state effects.The interaction between Cu and ZrO2 leads to the charge transfer from Cu to the ZrO2 substrate,which causes the appearance of Cu(Ⅰ) state.Above 1 ML,Cu becomes metallic state on ZrO2.更多还原