Fabrication and Characterization of Nanostructure Materials

Posted June 24th, 2010 at 1:09 pm.

Abstract: Holly Brunner
Mentor: Dr. Beckmann
The research plan for the summer of 2010 will focus on the fabrication of nanostructures by using a template-based electrochemical deposition process. Electrochemical deposition is carried out by passing an electric current through a metal ion and water solution to form a solid metal film [1]. The fabrication of the nanostructures will come in two stages. The first stage will be to master the process of electrochemical deposition to create a uniform metal thin film, such as nickel (Ni). This thin film will be made without a template and then be studied to ensure that the metal film has a designed chemical composition and uniform thickness and density. The uniformity of the nickel film is essential for progressing with the building of other nano structures such as nanowires, porous nanotemplates, and nanotubes [2]. The second step of this research will be combining the electrochemical deposition technique developed from the first step with a template to fabricate either nanowires or nano-porous structures. The process of fabricating nickel nanowires will be similar to that of the thin film but instead of having the nickel atoms collect on a smooth substrate surface, a porous alumina template will be used to build up the nickel atoms in the form of nanowires. After the pores have been filled the template is removed and free-standing nickel wires are left. The fabrication of nano-porous structures is a three-step process. First a controlled environment chamber is used for the self-assembly of polystyrene spheres with nano-sized diameter into a 3D crystal-like structure, which will serve as the template for electrochemical deposition. Next nickel metal is deposited into the template made of self-assembled spheres. Then the polystyrene spheres are removed and what is left is a porous nanostructure. After both the nanowires and nanotemplates are fabricated we will use a scanning electron microscope (SEM) to observe the nanostructures.

References:
1. Cheng, Xuemei M. Magnetization Reversal and Magnetotransport Properties of Cobalt/ Platinum Mulitlayers with Perpendicular Magnetic Anisotropy (Ph. D Dissertation). Baltimore, Maryland: 2006
2. Ertan, Asli, Tewari, Surendra N. and Talu, Orhan(2008) “Electrodeposition of Nickel Nanowires and Nanotubes Using Various Templates”, Journal of Experimental Nanoscience, 3: 4, 287-295

Filed under: 2010,Beckmann, Dr. Peter,Brunner, Holly Tags: by Lisa Klinman

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