Cobalt Ferrite Nanoparticles Fabricated via Co-precipitation in Air: Overview of Size Control and Magnetic Properties

Authors

Dennis Toledo, Florida International UniversityFollow

Document Type

Thesis

Degree

Master of Science (MS)

Major/Program

Biomedical Engineering

First Advisor's Name

Sakhrat Khizroev

First Advisor's Committee Title

Committee Chair

Second Advisor's Name

Jean H. Andrian

Second Advisor's Committee Title

Committee Member

Third Advisor's Name

Shuliang Jiao

Third Advisor's Committee Title

Committee Member

Keywords

Cobalt Ferrite, Nanoparticles, Co-precipitation, Particle Diameter, Magnetic Properties

Date of Defense

11-13-2015

Abstract

Cobalt Ferrite has important, size-dependent magnetic properties. Consequently, an overview of particle size is important. Co-precipitation in air was the fabrication method used because it is comparatively simple and safe. The effects of three different reaction times including 1, 2, 3 hour(s) on particle size were compared. Also, the effectiveness of three different capping agents (Oleic Acid, Polyvinylpyrollidone (PVP), and Trisodium Citrate) in reducing aggregation and correspondingly particle size were examined. Using Welch’s analysis of variance (ANOVA) and the relevant post hoc tests, there was no significant difference (p=0.05) between reaction times of 1 hour and 2 hours, but there was a significant difference between reaction times of 2 hours and 3 hours. Potentially, because of increased coarsening for the 3 hour reaction time. PVP and Oleic Acid were shown to be effective in reducing aggregation; however, Citrate was not effective. Possibly, the synthesis procedure was inadequate.

Identifier

FIDC000195

Recommended Citation

Toledo, Dennis, "Cobalt Ferrite Nanoparticles Fabricated via Co-precipitation in Air: Overview of Size Control and Magnetic Properties" (2015). FIU Electronic Theses and Dissertations. 2298.
https://digitalcommons.fiu.edu/etd/2298