Journal
NANO LETTERS
Volume 11, Issue 4, Pages 1641-1645Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl200110t
Keywords
Magnetic nanoparticles; bcc-Fe; nanoparticle stability; magnetic imaging; magnetic hyperthermia
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Funding
- NIH/NCI [1R21CA12859]
- DOE/EPS-CoR [DE-FG02-07ER36374]
- DARPA/ARO [W911NF-08-1-0249]
- Brown Imaging Fund
- French State/D4S grant
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We report,a facile synthesis of body centered cubic (bcc) Fe nanoparticles (NPs) via the thermal decomposition of iron pentacarbonyl, Fe(CO)(5), in the presence of hexadecylammonium chloride. These bcc-Fe NPs exhibit a drastically increased stability and magnetic moment (M-s = 164 A . m(2) . kg(-1) (Fe)) even in physiological solutions, and have much enhanced magnetic imaging contrast (r(2) = 220 s(-1) . mM(-1)) and heating (SAR = 140 W . g(Fe)(-1)) effects. They may serve as robust probes for imaging and therapeutic applications.
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