Journal ArticleDOI
Chemically synthesized Au-Fe 3 O 4 nanostructures with controlled optical and magnetic properties
V. Velasco,V. Velasco,Laura Martínez Muñoz,E. Mazario,Nieves Menéndez,Pilar Herrasti,Antonio Hernando,Antonio Hernando,Patricia Crespo,Patricia Crespo +9 more
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Au-Fe3O4 dumbbell-like, flower-like and core-shell nanostructures with different sizes ranging between 4-15 nm have been synthesized via the thermal decomposition of iron pentacarbonyl and reduction of gold salts.Abstract:
Au–Fe3O4 dumbbell-like, flower-like and core-shell nanostructures with different sizes ranging between 4–15 nm have been synthesized via the thermal decomposition of iron pentacarbonyl and reduction of gold salts. By means of the variation of the precursors' molar ratio, the injection temperature and the reaction time, the optical and magnetic properties have been tailored. A strong dependence on the dielectric function of the present Fe3O4 nanoparticles (NPs) was detected. The gold characteristic plasmon peak shifts from 525 nm (pure gold NPs) to close to 600 nm showing an electron damping in the Au NPs surrounded by Fe3O4. These NPs are ferromagnetic at low temperature, exhibiting a coercive field ranging between 85–500 Oe, whereas they behave as a superparamagnetic system above the blocking temperature, which is found to be between 18–110 K. A high magnetic anisotropy is generated in the interface of Au–Fe3O4 NPs.read more
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Journal ArticleDOI
Exchange Bias Effects in Iron Oxide-Based Nanoparticle Systems.
Manh-Huong Phan,Javier Alonso,Hafsa Khurshid,Paula Lampen-Kelley,Sayan Chandra,Kristen Stojak Repa,Zohreh Nemati,Raja Das,Òscar Iglesias,Hariharan Srikanth +9 more
TL;DR: This review paper aims to provide a thorough understanding of the EB and related phenomena in iron oxide-based nanoparticle systems, knowledge of which is essential to tune the anisotropic magnetic properties of exchange-coupled nanoparticles systems for potential applications.
Journal ArticleDOI
Exchange Bias Effects in Iron Oxide-Based Nanoparticle Systems
Manh-Huong Phan,Javier Alonso,Hafsa Khurshid,Paula Lampen-Kelley,Sayan Chandra,Kristen Stojak Repa,Zohreh Nemati,Raja Das,Òscar Iglesias,Hariharan Srikanth +9 more
TL;DR: In this paper, the authors provide a thorough understanding of the EB and related phenomena in iron oxide-based nanoparticle systems, knowledge of which is essential to tune the anisotropic magnetic properties of exchange-coupled nanoparticles for potential applications.
Journal ArticleDOI
Eco-friendly seeded Fe3O4-Ag nanocrystals: a new type of highly efficient and low cost catalyst for methylene blue reduction
Yanqing Liu,Yuwei Zhang,Qiangwei Kou,Yanli Chen,Deming Han,Deqiang Wang,Ziyang Lu,Lei Chen,Jinghai Yang,S. Xing +9 more
TL;DR: Hybrid Fe3O4-Ag nanocrystals, a new type of highly efficient and reusable catalyst for methylene blue (MB) reduction, are fabricated by a novel seed deposition process as mentioned in this paper.
Journal ArticleDOI
Colloidal Magnetic Heterostructured Nanocrystals with Asymmetric Topologies: Seeded-Growth Synthetic Routes and Formation Mechanisms
TL;DR: In this paper, the authors provide a glimpse into this fast-growing research field by illustrating progress achieved in the wet-chemical development of last-generation breeds of all-inorganic heterostructured nanocrystals (HNCs) in asymmetric non-onionlike geometries, in which distinct nanoscale crystalline modules are interconnected in hetero-dimer, heter-oligomer and anisotropic multidomain architectures via epitaxial heterointerfaces of limited extension.
Journal ArticleDOI
Microfluidic Synthesis of Multimode Au@CoFeB-Rg3 Nanomedicines and Their Cytotoxicity and Anti-Tumor Effects
Weiwei Zhang,Xiaoxiong Zhao,Yuan Yuan,Fenglin Miao,Wengang Li,Shaoxia Ji,Xing Huang,Xinhua Chen,Tianan Jiang,David A. Weitz,Yujun Song +10 more
TL;DR: In this article, the authors conjugated multimode nanohybrids with active ingredients of natural herbs using Au@CoFeB nanoparticles as one model of multimode nanoparticles.
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