The Use of Polyethyleneimine to Control the Growth-Front Morphology of Electrochemically Deposited Gold Nanowires for Engineered Nanogap Electrodes

Manuel DaSilva, Purdue University
Matthew Schneider, Purdue University - Main Campus
Daniel Wood, Purdue University - Main Campus
Bong-Joong Kim, Purdue University - Main Campus
E A. Stach, Birck Nanotechnology Center and School of Materials Engineering, Purdue University
Tim Sands, Purdue University

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Polyethyleneimine (PEI) is utilized in an electrolytic bath for the planarization of electrodeposited nanowire growth fronts in porous anodic alumina templates. The addition of highly branched, low-molecular-weight PEI to the plating bath also provides improved uniformity in the distribution of nanowire growth rates from pore to pore and allows for a more precise control over the electrochemical growth process.


Engineering | Nanoscience and Nanotechnology