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Raman scattering characterization of vertical aligned 1D IrO2 nanocrystals grown on single crystal oxide substrates

机译:在单晶氧化物衬底上生长的垂直取向一维IrO2纳米晶体的拉曼散射表征

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摘要

Raman scattering (RS) has been used as a technique for characterization of lrO(2) one dimensional (1D) nanocrystals (NCs) deposited on sapphire(100) and LiNbO3(100) substrates under various conditions. The lrO(2) NCs were grown via metalorganic chemical vapor deposition method using (MeCp)(COD)Ir as the precursor and reactive magnetron sputtering using Ir metal target. The red-shifts and asymmetric broadening of the Raman lineshape for the NCs were analyzed by a modified spatial correlation (MSC) model, which includes the factor of stress induced shift. The proposed MSC model showed that the effects of stress and nanometric size can be separated in analyzing the observed Raman features. The usefulness of the experimental RS together with the MSC model analysis as a residual stress and structural characterization technique for 1D NCs has been demonstrated. (c) 2005 Elsevier Ltd. All rights reserved.
机译:拉曼散射(RS)已被用作表征在各种条件下沉积在蓝宝石(100)和LiNbO3(100)衬底上的lrO(2)一维(1D)纳米晶体(NCs)的技术。通过使用(MeCp)(COD)Ir作为前驱体并使用Ir金属靶进行反应磁控溅射,通过金属有机化学气相沉积方法生长了lrO(2)NC。通过改进的空间相关(MSC)模型分析了NC的拉曼线形的红移和不对称展宽,该模型包括应力引起的移位的因素。所提出的MSC模型表明,在分析观察到的拉曼特征时,应力和纳米尺寸的影响可以分开。已经证明了实验性RS和MSC模型分析作为一维NC的残余应力和结构表征技术的有用性。 (c)2005 Elsevier Ltd.保留所有权利。

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