Synthesis of cobalt ferrite nanoparticles via electrospraying into a liquid collector
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Synthesis of cobalt ferrite nanoparticles via electrospraying into a liquid collector Amanda M. Uhl1, Sara C. Mills1, Jennifer S. Andrew1,a) 1
Department of Materials Science and Engineering, University of Florida, Florida, Gainesville 32611, USA Address all correspondence to this author. e-mail: [email protected]fl.edu This paper has been selected as an Invited Feature Paper. a)
Received: 4 October 2019; accepted: 8 January 2020
Methods that allow for high-throughput synthesis of magnetic nanoparticles are necessary to more feasibly fabricate materials for real-world applications. To accomplish this, in this article, we describe a versatile electrospray-based synthesis method for the synthesis of magnetic cobalt ferrite nanoparticles. This method has the potential to be readily scaled up using methods similar to those currently used in place for the large-scale electrospinning of fibers. To mitigate film formation as often seen with electrospraying ceramics onto a flat plate collector, we developed a method where the magnetic cobalt ferrite nanoparticles were electrosprayed into a silicone oil–based liquid collector. The as-sprayed particles were then crystalized by salt calcining with sodium chloride at 800 °C. The synthesized magnetic nanoparticles obtained using this method had an average particle diameter of 20.7 ± 11.5 nm. This liquid collection method for the synthesis of cobalt ferrite also presents a versatile platform for the synthesis of a wide range of functional nanomaterials and nanocomposites. Jennifer Andrew is currently the Margaret A. Ross associate professor in the Department of Materials Science & Engineering at the University of Florida. She was awarded an NSF CAREER in 2011. Before coming to UF, she was a UC President’s postdoctoral fellow in Michael J. Sailor’s laboratory in the Department of Chemistry and Biochemistry at the University of California, San Diego. She received her B.S. in Materials Science from Northwestern University in 2002, and her Ph.D. in Materials Engineering in 2008 from the University of California, Santa Barbara. Her research interests include the development of nanocomposite materials with novel multifunctional electronic and biomedical applications.
Jennifer S. Andrew
Introduction Electrospraying is a versatile technique that enables the facile synthesis of nanoparticles. While electrospraying has typically been used for the production of polymeric nanoparticles, it has also recently garnered some interest for the synthesis of ceramics, specifically the use of electrospray for the deposition of ceramic films [1, 2, 3, 4, 5, 6, 7, 8]. This may be in part due to the difficulty of obtaining discrete ceramic particles using electrospraying rather than films of the ceramic material. This work develops a method that overcomes the limitation of traditional electrospraying, by electrospraying cobalt ferrite
sol–gel precursor solutions into a liquid collector. This modified electrospraying platform enables the facile and scal
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