Abstract
Au nanorod arrays were grown by electrodeposition in Au-backed nanoporous alumina templates modified with polyethylenimine (PEI) as an adhesion layer. By varying the concentration and molecular weight of PEI, the length of nanorod arrays could be finely controlled. The local length distribution was extremely narrow with relative standard deviations on the order of 2% for rod lengths from 700 nm to 17 microns. The uniform growth rate appears to be determined by the adsorbed PEI matrix, which controls the growth kinetics of the grains comprising the nanorods. Templates coated with poly(acrylic acid) did not impart fine control in nanorod growth. The nanorods could also be thermally annealed within the template and released as monodisperse particles of uniform size.
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Moon, JM., Wei, A. Controlled Growth of Gold Nanorod Arrays from Polyethylenimine-coated Alumina Templates. MRS Online Proceedings Library 900, 1232 (2005). https://doi.org/10.1557/PROC-0900-O12-32
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DOI: https://doi.org/10.1557/PROC-0900-O12-32