Journal
NANO LETTERS
Volume 12, Issue 7, Pages 3716-3721Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl301499u
Keywords
Magnetism; magnetic anisotropy; exchange coupling core-shell structure; cube nanoparticle; hypertherrnia
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Funding
- Creative Research Initiative [2010-0018286]
- WCU [R32-10217]
- BK21 for chemistry and medical science
- NRF of Korea [2011-0017611]
- Mid-Career Researcher Program [2009-0081001]
- Hi Seoul Science/Humanities Fellowship
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With the aim of controlling nanoscale magnetism, we demonstrate an approach encompassing concepts of surface and exchange anisotropy while reflecting size, shape, and structural hybridization of nanoparticles. We visualize that cube has higher magnetization value than sphere with highest coercivity at 60 nm. Its hybridization into core-shell (CS) structure brings about a 14-fold increase in the coercivity with an exceptional energy conversion of magnetic field into thermal energy of 10600 W/g, the largest reported to date. Such capability of the CS-cube is highly effective for drug resistant cancer cell treatment.
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