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Controlled Growth of Gold Nanorod Arrays from Polyethylenimine-coated Alumina Templates

Published online by Cambridge University Press:  01 February 2011

Jeong-Mi Moon  and
Alexander Wei
Jeong-Mi Moon
Affiliation:
jeongmi@purdue.edu, Purdue University, Chemistry, 560 Oval Drive, Box # 155, West Lafayette, IN, 47907, United States
Alexander Wei
Affiliation:
alexwei@purdue.edu, Purdue University, Chemistry, 560 Oval Drive, Box # 155, West Lafayette, IN, 47907, United States
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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.

Keywords

electrodepositionnucleation & growthadhesive
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 900: Symposium O – Nanoparticles and Nanostructures in Sensors and Catalysis , 2005 , 0900-O12-32
Copyright
Copyright © Materials Research Society 2006

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