نتایج جستجو برای: nanomagnetite fe3o4

تعداد نتایج: 5060  

2015
S. S. Pati L. Herojit Singh A. C. Oliveira

Chitosan functionalized Fe3O4-Au core shell nanoparticles have been prepared using a two-step wet chemical approach using NaBH4 as reducing agent for formation of Au in ethylene glycol. X-ray diffraction studies shows individual phases of Fe3O4 and Au in the as prepared samples with crystallite size of 5.9 and 11.4 nm respectively. The functionalization of the core-shell nanostructure with Chit...

2017
Xupeng Mu Fuqiang Zhang Chenfei Kong Hongmei Zhang Wenjing Zhang Rui Ge Yi Liu Jinlan Jiang

Multifunctional nanocomposites that have multiple therapeutic functions together with real-time imaging capabilities have attracted intensive concerns in the diagnosis and treatment of cancer. This study developed epidermal growth factor receptor (EGFR) antibody-directed polydopamine-coated Fe3O4 nanoparticles (Fe3O4@PDA NPs) for magnetic resonance imaging and antitumor chemo-photothermal thera...

2015
Er Liu Honglei Yuan Zhaoxia Kou Xiumei Wu Qingyu Xu Ya Zhai Yunxia Sui Biao You Jun Du Hongru Zhai

The core-shell structural Fe3O4/ZnS nanocomposites with controllable shell thickness were well-fabricated via seed-mediate growth method. Structural and morphological characterizations reveal the direct deposition of crystalline II-VI compound semiconductor ZnS shell layer on Fe3O4 particles. Spin dependent electrical transport is studied on Fe3O4/ZnS nanocomposites with different shell thickne...

2017
Camille Crouzet Fabrice Brunet Nadir Recham Anne-Line Auzende Nathaniel Findling Valérie Magnin Jean-Henry Ferrasse Bruno Goffé

The effect of acidic conditions (in a pH range of 3 to 6) and temperature on the kinetics of the hydrothermal oxidation of ferrous iron contained in BOF steel slag has been tested in the 150–350C range for acid acetic concentrations from 0 to 4M. Reaction progress was monitored with the amount of produced H2. Higher temperature and lower pH are found to enhance the hydrothermal oxidation kineti...

2016
Junran Zhang Zhenyao Wu Minhao Zhang Wei Niu Ming Gao Ying Zhou Wenqing Liu Xuefeng Wang Rong Zhang Yongbing Xu

We demonstrated the effect of superparamagnetic Fe3O4 nanoparticles on Schottky barriers of graphene, in which the Fe3O4 nanoparticles were fabricated by a hydrothermal method and the single-layer graphene sheets were mechanically exfoliated from Kish graphite. The Fe3O4 nanoparticles were superparamagnetic with the saturation magnetic moment of about 32 emu/g at room temperature. We have found...

2017
Nhung H A Nguyen Mohamed S A Darwish Ivan Stibor Pavel Kejzlar Alena Ševců

The most challenging task in the preparation of magnetic poly(N-isopropylacrylamide) (Fe3O4-PNIPAAm) nanocomposites for bio-applications is to maximise their reactivity and stability. Emulsion polymerisation, in situ precipitation and physical addition were used to produce Fe3O4-PNIPAAm-1, Fe3O4-PNIPAAm-2 and Fe3O4-PNIPAAm-3, respectively. Their properties were characterised using scanning elec...

2017
Penglei Wang Xin Zhou Yagang Zhang Liping Yang Keke Zhi Lulu Wang Letao Zhang Xinfeng Guo

Nano-dispersed Fe and Fe3O4 on reduced graphene oxide (Fe /Fe3O4-RGO) was prepared and characterized. The prepared Fe/Fe3O4-RGO was used as a magnetically separable Fenton-like catalyst and showed superior catalytic activity compared to Fe3O4-RGO and Fe3O4 as well as other Fenton-like catalysts for the removal of phenol. The Fe/Fe3O4-RGO achieved 100% removal efficiency for phenol within 30 min...

2015
Lirija Alili Swetlana Chapiro Gernot U. Marten Annette M. Schmidt Klaus Zanger Peter Brenneisen

Iron oxide (Fe3O4) nanoparticles have been used in many biomedical approaches. The toxicity of Fe3O4 nanoparticles on mammalian cells was published recently. Though, little is known about the viability of human cells after treatment with Fe3O4 nanoparticles. Herein, we examined the toxicity, production of reactive oxygen species, and invasive capacity after treatment of human dermal fibroblasts...

Journal: :Dalton transactions 2015
Gengping Wan Guizhen Wang Xianqin Huang Haonan Zhao Xinyue Li Kan Wang Lei Yu Xiange Peng Yong Qin

An elegant atomic layer deposition (ALD) method has been employed for controllable preparation of a uniform Fe3O4-coated ZnO (ZnO@Fe3O4) core-shell flower-like nanostructure. The Fe3O4 coating thickness of the ZnO@Fe3O4 nanostructure can be tuned by varying the cycle number of ALD Fe2O3. When serving as additives for microwave absorption, the ZnO@Fe3O4-paraffin composites exhibit a higher absor...

2015
San Kyeong Cheolhwan Jeong Homan Kang Hong-Jun Cho Sung-Jun Park Jin-Kyoung Yang Sehoon Kim Hyung-Mo Kim Bong-Hyun Jun Yoon-Sik Lee Vipul Bansal

Superparamagnetic Fe3O4 nanoparticles (NPs) based nanomaterials have been exploited in various biotechnology fields including biomolecule separation. However, slow accumulation of Fe3O4 NPs by magnets may limit broad applications of Fe3O4 NP-based nanomaterials. In this study, we report fabrication of Fe3O4 NPs double-layered silica nanoparticles (DL MNPs) with a silica core and highly packed F...

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