Kondrachova Lilia V, May R Alan, Cone Craig W, Vanden Bout David A, Stevenson Keith J
Department of Chemistry and Biochemistry, Center for Nano- and Molecular Science and Technology, Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712, USA.
Langmuir. 2009 Feb 17;25(4):2508-18. doi: 10.1021/la803245a.
A microscope-CCD setup has been developed as an analytical tool for the detection of diffraction from one-dimensional redox-active transition-metal oxide gratings prepared with a combination of microtransfer molding (microTM) and cathodic electrodeposition. The diffraction efficiencies (DE) of tungsten trioxide, WO3, and binary molybdenum-tungsten trioxide, Mo0.6W0.4O3, gratings were measured during Li+ insertion/deinsertion experiments performed with both cyclic voltammetry and chronoamperometry in 1 M LiClO4/propylene carbonate. The DE was evaluated in terms of the optical constants of the grating materials determined by spectroscopic ellipsometry (SE) measurements of Li+ insertion/deinsertion into unpatterned thin films. The effect of grating thickness and the amount of inserted charge on DE has been analyzed. The diffraction method is used to quantitatively estimate lithium ion diffusion coefficients of electrochemically active metal oxide gratings.
已开发出一种显微镜-电荷耦合器件（CCD）装置，作为一种分析工具，用于检测通过微转移成型（microTM）和阴极电沉积相结合制备的一维氧化还原活性过渡金属氧化物光栅的衍射。在1 M LiClO4/碳酸丙烯酯中，通过循环伏安法和计时电流法进行Li+嵌入/脱嵌实验期间，测量了三氧化钨（WO3）和二元钼钨三氧化物（Mo0.6W0.4O3）光栅的衍射效率（DE）。根据通过光谱椭偏仪（SE）测量Li+嵌入/脱嵌到无图案薄膜中所确定的光栅材料的光学常数来评估DE。分析了光栅厚度和插入电荷量对DE的影响。衍射方法用于定量估计电化学活性金属氧化物光栅的锂离子扩散系数。
