Wes (Zhiwei) Li
Purdue University
Project Title: Controlled Electrodeposition of Metallic Nanowires
Advisor: Prof. Tim Sands
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Introduction
This work begins with the fabrication of porous anodic alumina(PAA) templates from high purity aluminum foils. A two-step anodization process will be used to develop porous templates that have a high degree of pore order and controllable pore size. The pore size of these templates can tuned from 10 to 250 nm depending on the anodization voltage. Pulsed DC electrochemical deposition will subsequently be used to grow metallic nanowires within the pores of PAA,and polycarbonate membrane can also be used for growth of metallic nanowires.
Project Objectives
To study the electrochmical behavior of gold nanowires electrodeposited within polycarbonate and porous anodic alumina membranes that contains nanoscopic parallel pores.
Approach
- Use galvanostatic pulse plating elctrodeposition to optimize the growth uniformity. Galvanostatic elctrodeposition means applying current and keep it constant.
- Determine the correlation between current density and nanowire growth rates.
- To frabricate a tri-layered(Au-Ag-Au) nanowire through a dual-bath electrolytic system. A dual-bath system implies that the electrolyte is switched between one that contains gold ions,for example, to one that contains only silver ions.
Contact me: li16@purdue.edu
