Tunable magnetic nanowires for biomedical and harsh environment applications

Yurii P. Ivanov, Ahmed Alfadhel, Mohammed Y. Al-Nassar, Jose E. Perez, Manuel Vazquez, Andrey Chuvilin, Jürgen Kosel

Research output: Contribution to journalArticlepeer-review

85 Scopus citations


We have synthesized nanowires with an iron core and an iron oxide (magnetite) shell by a facile low-cost fabrication process. The magnetic properties of the nanowires can be tuned by changing shell thicknesses to yield remarkable new properties and multi-functionality. A multi-domain state at remanence can be obtained, which is an attractive feature for biomedical applications, where a low remanence is desirable. The nanowires can also be encoded with different remanence values. Notably, the oxidation process of single-crystal iron nanowires halts at a shell thickness of 10 nm. The oxide shell of these nanowires acts as a passivation layer, retaining the magnetic properties of the iron core even during high-temperature operations. This property renders these core-shell nanowires attractive materials for application to harsh environments. A cell viability study reveals a high degree of biocompatibility of the core-shell nanowires.
Original languageEnglish (US)
JournalScientific Reports
Issue number1
StatePublished - Apr 13 2016


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