Bibliographies thématiques / Superparamagnetic Graphene

Littérature scientifique sur le sujet « Superparamagnetic Graphene »

Auteur : Grafiati
Publié le 7 septembre 2023

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Articles de revues sur le sujet "Superparamagnetic Graphene"

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Zhao, Dong Lin, Li Zhong Bai, Xiao Li et Dong Dong Zhang. « Preparation and Superparamagnetic Properties of Graphene/Fe3O4 Nanocomposite ». Applied Mechanics and Materials 320 (mai 2013) : 518–21. http://dx.doi.org/10.4028/www.scientific.net/amm.320.518.

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The superparamagnetic graphene/Fe3O4nanocomposite has been successfully prepared via an easy and scalable chemical precipitation method. High quality graphene sheets were prepared from natural flake graphite by oxidation, rapid expansion and ultrasonic treatment. The structure of graphene and graphene/Fe3O4nanocomposite was investigated by transmission electron microscopy, Xray diffraction and Fourier transform infrared spectroscopy. The graphene sheets possess a curled morphology consisting of a thin wrinkled paper-like structure. The graphene/Fe3O4nanocomposite exhibits a superparamagnetic behavior, its specific saturation magnetization,Msis 38.92 emu g-1.
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Zheng, Xinliang, Juan Feng, Yan Zong, Hui Miao, Xiaoyun Hu, Jintao Bai et Xinghua Li. « Hydrophobic graphene nanosheets decorated by monodispersed superparamagnetic Fe3O4 nanocrystals as synergistic electromagnetic wave absorbers ». Journal of Materials Chemistry C 3, no 17 (2015) : 4452–63. http://dx.doi.org/10.1039/c5tc00313j.

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Superparamagnetic Fe3O4 nanocrystals anchored on hydrophobic graphene nanosheets are prepared and are shown to act as synergistic electromagnetic wave absorbers with good stability.
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Liu, Ru, Qingshan Zhao, Yang Li, Guoliang Zhang, Fengbao Zhang et Xiaobin Fan. « Graphene Supported Pt/Ni Nanoparticles as Magnetically Separable Nanocatalysts ». Journal of Nanomaterials 2013 (2013) : 1–7. http://dx.doi.org/10.1155/2013/602602.

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Efficient recovery of nanocatalysts, especially the graphene supported noble metal catalysts, is a challenge. In this study, we report a simple one-step route to prepare the graphene supported Pt/Ni nanocatalysts with ideal superparamagnetic properties. We demonstrated that they had excellent catalytic activities in the catalytic reduction of aromatic nitro compounds and could be easily separated from the reaction mixtures by applying an external magnetic field.
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Liu, Rui, Jing-Fu Liu, Li-Qiang Zhang, Jie-Fang Sun et Gui-Bin Jiang. « Low temperature synthesized ultrathin γ-Fe2O3 nanosheets show similar adsorption behaviour for As(iii) and As(v) ». Journal of Materials Chemistry A 4, no 20 (2016) : 7606–14. http://dx.doi.org/10.1039/c6ta01217e.

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As synthesised graphene-like, superparamagnetic γ-Fe2O3 nanosheets show superior inorganic arsenic scavenging performance, demonstrating the feasibility of solving an environmental problem through material innovation, and the foreground of 2D materials in environmental improvement.
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Zhang, Xiaojuan, Wenbin Cai, Lingyun Hao, Suli Feng, Qing Lin et Wei Jiang. « Preparation of Fe3O4/Reduced Graphene Oxide Nanocomposites with Good Dispersibility for Delivery of Paclitaxel ». Journal of Nanomaterials 2017 (2017) : 1–10. http://dx.doi.org/10.1155/2017/6702890.

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The Fe3O4/reduced graphene oxide (Fe3O4/RGO) nanocomposites with good dispersibility were synthesized for targeted delivery of paclitaxel (PTX). Firstly, the superparamagnetic Fe3O4/functional GO nanocomposites were prepared via hydrothermal method in which GO sheets were modified by surfactant wrapping. The Fe3O4/RGO nanocomposites were successively prepared through the reduction of graphene oxide. The products were investigated by Fourier-transform infrared spectrum, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and vibration sample magnetometry. It was found that spherical Fe3O4 nanoparticles were uniformly anchored over the RGO matrix and the nanocomposites were superparamagnetic with saturation magnetization (Ms) of 9.39 emu/g. Then PTX was loaded onto Fe3O4/RGO nanocomposites, and the drug loading capacity was 67.9%. Cell viability experiments performed on MCF-7 demonstrated that the Fe3O4/RGO-loaded PTX (Fe3O4/RGO/PTX) showed cytotoxicity to MCF-7, whereas the Fe3O4/RGO displayed no obvious cytotoxicity. The above results indicated that Fe3O4/RGO/PTX nanocomposites had potential application in tumor-targeted chemotherapy.
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Tian, Zhengshan, Chunxiang Xu, Jitao Li, Gangyi Zhu, Xiaoyong Xu, Jun Dai, Zengliang Shi et Yi Lin. « Manganese ion-assisted assembly of superparamagnetic graphene oxide microbowls ». Applied Physics Letters 104, no 12 (24 mars 2014) : 121602. http://dx.doi.org/10.1063/1.4870093.

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Li, Baojun, Huaqiang Cao, Jin Shao, Meizhen Qu et Jamie H. Warner. « Superparamagnetic Fe3O4 nanocrystals@graphene composites for energy storage devices ». Journal of Materials Chemistry 21, no 13 (2011) : 5069. http://dx.doi.org/10.1039/c0jm03717f.

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Chuanyu, Sun, et Wang Yu. « Synthesis and characterization of graphene oxide composite with Fe3O4 ». Materials Science-Poland 33, no 3 (1 septembre 2015) : 488–90. http://dx.doi.org/10.1515/msp-2015-0068.

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Abstract In the paper, a magnetic composite of graphene oxide (MGO) has been successfully synthesized through decomposition of iron (III) acetylacetonate in the mixture solution of triethylene glycol and graphene oxide (GO). Atomic force microscopy (AFM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and superconducting quantum interference device were used to characterize the material. The results show that the magnetic Fe3O4 nanoparticles modified graphene oxide composite with superparamagnetic properties, and magnetization saturation of 16.4 emu/g has been obtained. The MGO has a good sustained-release performance, and in vitro cytotoxicity confirming its secure use as a potential drug carrier.
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Li, Cheng, Dong Lin Zhao, Fei Fei Sun, Xia Jun Wang et Ran Ran Yao. « Inductive Heating Property of Superparamagnetic Graphene Nanosheets-Fe3O4 Nanoparticles Hybrid in an AC Magnetic Field for Localized Hyperthermia ». Key Engineering Materials 727 (janvier 2017) : 347–52. http://dx.doi.org/10.4028/www.scientific.net/kem.727.347.

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The superparamagnetic graphene nanosheets–Fe3O4 nanoparticles (GNs–Fe3O4) hybrid has been successfully prepared via an easy and scalable chemical precipitation method. The inductive heat property of GNs–Fe3O4 hybrid in an alternating current (AC) magnetic field was investigated. The potential of GNs–Fe3O4 hybrid was evaluated for localized hyperthermia treatment of cancers. The GNs–Fe3O4 hybrid exhibits a superparamagnetic behavior, its specific saturation magnetization, Ms is 66.963 emu g-1. After exposed in the AC magnetic field for 1140 sec, the temperature of physiological saline suspension containing GNS–Fe3O4 hybrid were 81 oC. The GNs–Fe3O4 hybrid will be useful as good thermoseeds for localized hyperthermia treatment of cancers.
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Mikhnavets, L. A., A. N. Tkach, U. S. Fiadosenka et D. V. Radziuk. « Effect of ultrasound on nonsteroidal anti-inflammatory drugs complexed with copper, iron, zinc and graphene oxides ». Doklady BGUIR 18, no 8 (27 décembre 2020) : 69–76. http://dx.doi.org/10.35596/1729-7648-2020-18-8-69-76.

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This work aims at the formation of nanocomposites based on graphene and metal oxides (copper-iron, zinc and iron) through ultrasonic interaction (20 kHz) and investigation of their electromagnetic properties by scanning electron microscopy, Raman and absorption spectroscopy, and fluorescence methods. The output of this work implies the development of a single-step ultrasound method to form functional Cu/Fe-, ZnO-and Fe3O4-polyvinyl alcohol nanocomposites, and the ultrasonic conjugation of these nanocomposites with pristine drugs, such as ketorolac and acetylsalicylic acid. We established that formed Cu/Fe-graphene-ketorolac, ZnO-grapheneacetylsalicylic acid and Fe3O4-ketorolac obtain optical and superparamagnetic properties of nanoparticles with improved electromagnetic characteristics due to ultrasonic conjugation. Cu/Fe-graphene-ketorolac nanocomposites are revealed to have a spherical shape (< 100 nm) and acquire improved optoelectronic properties due to copper and iron atoms in the matrix of graphene. It is demonstrated that ZnO-graphene-acetylsalicylic acid nanocomposites obtain properties of fluorescence mainly for electromagnetic interaction with the ZnO phase formed on the surface of graphene. Ultrasonic conjugation of ketorolac with magnetite proved to increase the electron density of Fe3O4-ketorolac that obtains superparamagnetic properties, and its biocompatibility can be improved when coated with polyvinyl alcohol. In general, formed nanocomposites are of great interest in medical electronics and nanomedicine as functional materials with electromagnetic properties being controlled at the molecular and atomic levels. Such nanocomposites can also find application as components in electronic devices for diagnosis and treatment of serious inflammatory disorders. Industries will find the singlestep ultrasound method of special interest because it is eco-friendly and can be scaled up by a versatile spectrum of inorganic and organic materials and drugs.
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Thèses sur le sujet "Superparamagnetic Graphene"

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Chien, An-Ting. « Multi-functional PAN based composite fibers ». Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54304.

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Various nano-fillers can introduce specific functions into polymer and expand their application areas. Myriad properties, such as mechanical, electrical, thermal, or magnetic properties can be combined with original polymer characteristics, including flexible, light weight, and ease of use. These composites can be used to produce multi-functional fibers as the next generation textile or fabrics. In this research, Polyacrylonitrile (PAN) is adopted as the main polymer with different nano-fillers, such as carbon nanotube (CNT), iron oxide nanoparticle, and graphene oxide nanoribbon (GONR). Using gel-spinning technology, PAN-based composite fibers are fabricated in single- or bi-component fibers. Fibers are also characterized for their structure, morphology, mechanical properties, as well as for their electrical, thermal, or magnetic properties. For example, bi-component fibers with polymer sheath and polymer-CNT core as well as polymer-CNT sheath and polymer core are processed. With electrical and thermal conductivity introduced by CNT, such bi-components fibers can be applied for wearable electronics or for thermal management. Joule-heating effect owing to applied electrical current on single component PAN/CNT fibers is also investigated. With controllable electrical conductivity and fiber temperature, this active functional fiber can be applied for temperature regulation fibers or new carbon fiber manufacturing process. Another example is magnetic fiber with superparamagnetic iron oxide nano-particles. These novel magnetic fibers with high strength can be used for actuator, inductors, EMI shielding, or microwave absorption. GONR is also discussed and used to reinforce PAN-based fibers. Several theoretical models are considered to analyze the observed results.
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Actes de conférences sur le sujet "Superparamagnetic Graphene"

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Liu, Zeng-yong, Shao-cheng Yan, Zhen-da Lu et Fei Xu. « A Fiber-Optic magnetometer Based on Graphene NEMS Using Superparamagnetic Nanoparticles ». Dans Conference on Lasers and Electro-Optics/Pacific Rim. Washington, D.C. : OSA, 2018. http://dx.doi.org/10.1364/cleopr.2018.w3a.76.

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Dekamin, Mohammadghorban, Farahnaz Davoodi et Zahra Alirezvani. « Highly efficient synthesis of benzopyranopyrimidine derivatives catalyzed by functionalized superparamagnetic graphene oxide as a new and recoverable catalyst ». Dans The 21st International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland : MDPI, 2017. http://dx.doi.org/10.3390/ecsoc-21-05068.

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