由聚乙烯亚胺包覆的氧化铝模板制备的均匀金纳米棒阵列。
Uniform gold nanorod arrays from polyethylenimine-coated alumina templates.
作者信息
Moon Jeong-Mi, Wei Alexander
机构信息
Department of Chemistry, 560 Oval Drive, Purdue University, West Lafayette, Indiana 47907-2084, USA.
出版信息
J Phys Chem B. 2005 Dec 15;109(49):23336-41. doi: 10.1021/jp054405n.
Abstract
Monolithic Au nanorod arrays can be grown by electrodeposition in Au-backed nanoporous alumina templates using polyethylenimine (PEI) as an adhesion layer, with excellent height control between 300 nm and 1.4 microm. The local height distribution can be extremely narrow with relative standard deviations well below 2%. The uniform growth rate appears to be determined by the adsorbed PEI matrix, which controls the growth kinetics of the grains comprising the nanorods. The nanorods can be retained as free-standing 2D arrays after careful removal of the AAO template. Reflectance spectroscopy reveals a collective plasmon mode with a maximum near 1.2 microm, in accord with recent calculations for 2D arrays of closely spaced cylindrical nanoparticles.
摘要
通过在以金为背衬的纳米多孔氧化铝模板中进行电沉积，以聚乙烯亚胺（PEI）作为粘附层，可以生长出整体式金纳米棒阵列，其高度控制良好，在300纳米至1.4微米之间。局部高度分布可能极其狭窄，相对标准偏差远低于2%。均匀的生长速率似乎由吸附的PEI基质决定，该基质控制着构成纳米棒的晶粒的生长动力学。在小心去除阳极氧化铝（AAO）模板后，纳米棒可以保留为独立的二维阵列。反射光谱揭示了一种集体等离子体模式，其最大值接近1.2微米，这与最近对紧密排列的圆柱形纳米粒子二维阵列的计算结果一致。
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