Synthesis and characterization of poly(1-vinyltriazole)-grafted superparamagnetic iron oxide nanoparticles
2012 (English)In: Synthetic metals, ISSN 0379-6779, Vol. 162, no 7-8, 590-597 p.Article in journal (Refereed) Published
We reported on the synthesis and detailed physicochemical characterization of poly(1-vinyltriazole)-grafted iron oxide nanoparticles. Superparamagnetic iron oxide nanoparticles (SPION) were fabricated by gel-to-crystalline conversion method. Telomerization of poly(1-vinyltriazole) on iron oxide nanoparticles was achieved via silanization process. XRD analysis confirmed the crystalline phase as magnetite, and FT-IR analysis confirmed the presence of PVTri on nanoparticles. Particle morphology was observed to be polygonic, due to the synthesis process, while average size estimated from TEM micrographs is 7 nm. Agreement between crystallite size estimated from XRD and particle size from TEM affirms single crystalline character of these nanoparticles. Dependence of conductivity on temperature showed a strong evidence for thermally activated polarization mechanism. Temperature and frequency dependence of dielectric permittivity revealed interfacial polarization and temperature-assisted-reorganization effects. Magnetic evaluation showed non-saturation and superparamagnetic characteristics of nanoparticles as well as magnetic particles being single domains.
Place, publisher, year, edition, pages
2012. Vol. 162, no 7-8, 590-597 p.
SPION, Magnetic nanomaterials, Conductivity, Permittivity, Magnetization
IdentifiersURN: urn:nbn:se:kth:diva-96732DOI: 10.1016/j.synthmet.2012.02.005ISI: 000303976500006ScopusID: 2-s2.0-84859569944OAI: oai:DiVA.org:kth-96732DiVA: diva2:532935
QC 201206122012-06-122012-06-112012-06-12Bibliographically approved