Iron Oxide Nanocrystals for Magnetic Hyperthermia Applications
Autor: | Hugh D. C. Smyth, Antonio C. Rivera, Nathan J. Withers, Dale L. Huber, Nathaniel C. Cook, Surabhi Yadav, Marek Osinski, Leisha M. Armijo, Todd C. Monson, Gennady A. Smolyakov, Salomon Maestas, Yekaterina I. Brandt, Dimple Mathew, Natalie L. Adolphi |
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Jazyk: | angličtina |
Rok vydání: | 2012 |
Předmět: |
Ferrofluid
Materials science General Chemical Engineering Iron oxide Nanowire ferrofluid Nanotechnology 02 engineering and technology 010402 general chemistry 7. Clean energy 01 natural sciences Article lcsh:Chemistry Paramagnetism chemistry.chemical_compound thermotherapy General Materials Science business.industry iron oxide nanocrystals 021001 nanoscience & nanotechnology hyperthermia 0104 chemical sciences Magnetic field Magnetic hyperthermia Ferromagnetism chemistry Nanocrystal lcsh:QD1-999 Optoelectronics 0210 nano-technology business |
Zdroj: | Nanomaterials, Vol 2, Iss 2, Pp 134-146 (2012) Nanomaterials; Volume 2; Issue 2; Pages: 134-146 Nanomaterials |
ISSN: | 2079-4991 |
Popis: | Magnetic nanocrystals have been investigated extensively in the past several years for several potential applications, such as information technology, MRI contrast agents, and for drug conjugation and delivery. A specific property of interest in biomedicine is magnetic hyperthermia—an increase in temperature resulting from the thermal energy released by magnetic nanocrystals in an external alternating magnetic field. Iron oxide nanocrystals of various sizes and morphologies were synthesized and tested for specific losses (heating power) using frequencies of 111.1 kHz and 629.2 kHz, and corresponding magnetic field strengths of 9 and 25 mT. Polymorphous nanocrystals as well as spherical nanocrystals and nanowires in paramagnetic to ferromagnetic size range exhibited good heating power. A remarkable 30 °C temperature increase was observed in a nanowire sample at 111 kHz and magnetic field of 25 mT (19.6 kA/m), which is very close to the typical values of 100 kHz and 20 mT used in medical treatments. |
Databáze: | OpenAIRE |
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