Feb 18, 2009
High-throughput method for generating gold nanorods and nanowires
Researchers at Arizona State University have developed a novel multisegment template method for the high-throughput, cost-effective generation of solid and porous gold nanowires and nanorods.
To make the nanostructures, the group carried out sequential electrodeposition of segments of a desirable metal that resists chemical etching (for example, gold) and short segments (‘gaps’) of a non-desirable metal susceptible to chemical etching (for example, silver) into the template membrane. Following this alternate multisegment deposition, the template is dissolved followed by selective dissolution of the non-desirable gaps, leading to the generation of high yields of nanowires or nanorods of the desirable metal from each pore.
In addition to solid gold nanorods, the same multisegment method can be used for the generation of porous nanorods and nanowires. The multisegment method was shown to result in significant savings in material requirements, processing time, and overall production costs, when compared to traditionally used single-deposition methods.
It is anticipated that this method can lead to scaled-up synthesis of metallic nanowires and nanorods in biomedical and energy applications.
The team presented its work in Nanotechnology.
About the author
The work was performed at the Arizona State University (ASU) and sponsored by the National Institutes of Health and the National Science Foundation. Kaushal Rege is an assistant professor in the Department of Chemical Engineering, ASU. Joseph Wang is a professor in the Department of NanoEngineering, University of California, San Diego. Huang-Chiao Huang is a PhD student in Professor Rege’s laboratory; Jared Burdick recently completed his masters degree from ASU with Professor Wang, and Eric Alonas is an undergraduate student at ASU.