光散射学报, 2005, 17 (1): 1, 网络出版: 2006-05-19
不同退火温度的ZrO2 纳米颗粒光学声子和表面吸附分子的拉曼散射研究
Raman Scattering Studies of Annealing Temperature Dependence of Optical Phonons and Surface Adsorbed Molecular Vibrations in ZrO2 Nanograins
摘要
本文对晶粒尺寸在5nm-1μm范围的纯ZrO2纳米颗粒进行了拉曼散射研究。除了ZrO2本征拉曼振动峰外，还有几个新的拉曼振动模式被观察到。我们的结果显示当纳米颗粒尺寸减少时，纳米ZrO2颗粒的体相特征拉曼峰变弱，而由缺陷，表面和颗粒尺寸引起的相关效应呈强势。晶粒尺寸在15纳米左右是引起体相拉曼光谱变化的临界尺寸。晶粒尺寸在15纳米以下，其体相拉曼峰发生宽化和峰位移动，以及分别出现在位于1040cm^-1的表面振动峰和14个较弱的二阶振动模式。这些结果反映了纳米颗粒的微结构变化与颗粒尺寸和表面效应以及它们之间相互作用的信息。
Abstract
2 nano-crystalline grains sized in the range of 5 rim-1 m are systematically investigated using Raman spectroscopy．Besides zKh fundamental modes，a few weak Raman modes are observed．Our results show that bulk properties of nano-ZrOz diminish but the defect，surface-，and size-related features display aS grain size decreases．A critical size that dirides respective predominance is determined to be about 15 nlT1．General mode softening，a Surface mode around 1040 crn一 and 14 weak second-order modes are characteristics 0f Raman spectra of nano-ZrOz below 15 ILrn． They are associated with micr~tructure change of nanograins ，i．e．they reflect grain size，surface，and the interaction between nanograins
刘玉龙, 丁硕, 朱恪, 萧季驹. 不同退火温度的ZrO2 纳米颗粒光学声子和表面吸附分子的拉曼散射研究[J]. 光散射学报, 2005, 17(1): 1. 刘玉龙, 丁硕, 朱恪, 萧季驹. Raman Scattering Studies of Annealing Temperature Dependence of Optical Phonons and Surface Adsorbed Molecular Vibrations in ZrO2 Nanograins[J]. The Journal of Light Scattering, 2005, 17(1): 1.
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