Synthesis and characterization of Ni–Cu alloy nanoparticles with a tunable Curie temperature

Ferk, Gregor; Stergar, Janja; Makovec, Darko; Hamler, Anton; Jagličić, Zvonko; Drofenik, Miha; Ban, Irena

doi:10.1016/j.jallcom.2015.06.067

Cited by 23 publications

(18 citation statements)

References 24 publications

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“…This nding is backing previous publications which have suggested that by changing not only the size but also the shape of nanostructures, it is possible to control the magnetic properties of these nano-objects. [68][69][70][71] Besides, since spin canting in nanoparticles cannot be ignored because the shell atoms' spins may be inclined at some angle to their normal directions originating from the low number of their magnetic nearest neighbors, 65,72 it seems that the shapedependent Curie point of NPs obtained in this work can be caused by modications in the inuence of the spin canting effect when the nanoparticle shape is changed, i.e., as the NP shape exhibits a larger ratio of low-coordinated atoms-to-fullycoordinated atoms, the incomplete alignment at the shell part has a signicant contribution in enhancing the spin canting effect and, hence, the transformation of the NP magnetic state from ferromagnetic to paramagnetic may be required at a low temperature.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Shape-dependent structural and magnetic properties of Fe nanoparticles studied through simulation methods

et al. 2019

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Studying the shape-dependent structural and magnetic properties of nanoparticles is one of the most necessary scientific challenges in order to match these nano-objects for adequate applications. In this research paper, the shape effect of iron nanoparticles (FeNPs) on structural and magnetic properties was investigated on the basis of a combination of Molecular Statics (MS) and Monte Carlo (MC) simulations.To this end, three kinds of FeNP shapes (such as spherical, planar and rod) in an equal volume have been considered. The coordination number distribution of FeNPs obtained from the data extracted by MS simulations was exploited for performing MC simulations on the familiar Ising model. The numerical findings obtained showed that the structural stability, the Curie temperature as well as the shape of the hysteresis loop are correlated with the FeNP shape.

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Section: Magnetic Propertiesmentioning

confidence: 99%

Shape-dependent structural and magnetic properties of Fe nanoparticles studied through simulation methods

et al. 2019

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“…The abovementioned properties of MNPs and their ability to work at both cellular and molecular levels enabled their investigation and, in some cases, application in vitro and in vivo as part of drug delivery systems [15][16][17], in the targeted delivery of cytotoxic drugs [16,18,19], as active components in hyperthermia treatment [17,20,21], as contrast agents in magnetic resonance imaging (MRI) [1,22,23], as radiotherapeutics [24,25], for advanced gene delivery applications [26,27], for separation and selection [24,28], in magnetorelaxometry [29,30], as active antibacterial materials [31,32], in tissue engineering [8,33], and as part of biotherapeutics [34,35]. In the last decade, the authors of this paper developed several novel NiCu-based MNPs that not only exhibit all the above mentioned characteristics but also hold great promise for many different applications, which include multi-layer coatings, solar energy, and regenerative medicine, as well as in various formulations used in biomedicine [36][37][38][39]. The versatile range of potential applications, especially their applicability in biomedicine, is related to their chemical stability, proven biocompatibility with different human and animal cells, and tailorable magnetic characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…The versatile range of potential applications, especially their applicability in biomedicine, is related to their chemical stability, proven biocompatibility with different human and animal cells, and tailorable magnetic characteristics. Their magnetic properties can be controlled using different preparation methods, ranging from mechanical In the last decade, the authors of this paper developed several novel NiCu-based MNPs that not only exhibit all the above mentioned characteristics but also hold great promise for many different applications, which include multi-layer coatings, solar energy, and regenerative medicine, as well as in various formulations used in biomedicine [36][37][38][39]. The versatile range of potential applications, especially their applicability in biomedicine, is related to their chemical stability, proven biocompatibility with different human and animal cells, and tailorable magnetic characteristics.…”

Section: Introductionmentioning

confidence: 99%

The Potential Biomedical Application of NiCu Magnetic Nanoparticles

2019

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Magnetic nanoparticles became increasingly interesting in recent years as a result of their tailorable size-dependent properties, which enable their use in a wide range of applications. One of their emerging applications is biomedicine; in particular, bimetallic nickel/copper magnetic nanoparticles (NiCu MNPs) are gaining momentum as a consequence of their unique properties that are suitable for biomedicine. These characteristics include stability in various chemical environments, proven biocompatibility with various cell types, and tunable magnetic properties that can be adjusted by changing synthesis parameters. Despite the obvious potential of NiCu MNPs for biomedical applications, the general interest in their use for this purpose is rather low. Nevertheless, the steadily increasing annual number of related papers shows that increasingly more researchers in the biomedical field are studying this interesting formulation. As with other MNPs, NiCu-based formulations were examined for their application in magnetic hyperthermia (MH) as one of their main potential uses in clinics. MH is a treatment method in which cancer tissue is selectively heated through the localization of MNPs at the target site in an alternating magnetic field (AMF). This heating destroys cancer cells only since they are less equipped to withstand temperatures above 43 °C, whereas this temperature is not critical for healthy tissue. Superparamagnetic particles (e.g., NiCu MNPs) generate heat by relaxation losses under an AMF. In addition to MH in cancer treatment, which might be their most beneficial potential use in biomedicine, the properties of NiCu MNPs can be leveraged for several other applications, such as controlled drug delivery and prolonged localization at a desired target site in the body. After a short introduction that covers the general properties of NiCu MNPs, this review explores different synthesis methods, along with their main advantages and disadvantages, potential surface modification approaches, and their potential in biomedical applications, such as MH, multimodal cancer therapy, MH implants, antibacterial activity, and dentistry.

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“…Copper-nickel and copper-cobalt binary nanoparticles (BNPs) are consisted of copper and nickel and cobalt and copper metals, respectively, which provide many applications in different fields, compared to single-metal copper, nickel and cobalt nanoparticles, due to the composition of different percentages, varied particle sizes and the coexistent properties of both metals (copper and nickel or copper and cobalt) [7][8][9][10][11]. Nickel is completely mixed with copper and the resulting alloy only contains one phase in any ratio.…”

Section: Introductionmentioning

confidence: 99%

“…Different methods are commonly applied for the synthesis of mono-metal NPs (copper, nickel and cobalt) and copper-nickel and copper-cobalt binary mixtures including photolytic reduction, electrodeposition, uranium purification, electrolytic plating, thermal plasma synthesis, and microwave-hydrothermal [3,9,[20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effect of CuO/NiO and CuO/CoO Relative Composition on the Reduction Time of (CuO)x-(NiO)(1-x) and (CuO)x-(Co3O4)(1-x) with Methane Gas as the Reducing Agent in the Synthesis of Nano-bimetallic Nix-Cu(1-x) and Cux-Co(1-x)

Ghanbarabadi

Khoshandam

2019

Period. Polytech. Chem. Eng.

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In this paper, the reduction duration of (CuO)x-(NiO)(1-x) and (CuO)x-(Co3O4)(1-x) binary mixtures was studied using thermogravimetric method. The reduction reaction was performed using copper, nickel and cobalt oxides as metal precursors and methane gas as the reducing agent, under atmospheric pressure. The products as well as the raw materials were characterized and analyzed using X-Ray diffraction (XRD) and Energy Dispersive Spectroscopy (EDS). Initially, CoO, NiO and CuO were transformed to Co, Ni and Cu through reduction reactions with 23 Vol.% of methane at 830 °C. Results demonstrated that the reduction times of NiO, CoO and CuO NPs with CH4 at 830 °C were 14, 39 and 47 min, respectively. EDS and XRD analysis indicated that more than 97 % of copper, nickel and cobalt oxides were transformed to copper, nickel and cobalt NPs. The reaction time of (CuO)x-(NiO)(1-x) and (CuO)x-(Co3O4)(1-x) binary mixtures with methane was investigated to evaluate the effect of CuO (x=0, 0.4, 0.6, 1) relative composition. In addition, the reaction time of ternary mixture of (NiO)0.6-(CuO)0.2-(Co3O4)0.2 with methane gas was also studied.

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Synthesis and characterization of Ni–Cu alloy nanoparticles with a tunable Curie temperature

Cited by 23 publications

References 24 publications

Shape-dependent structural and magnetic properties of Fe nanoparticles studied through simulation methods

Shape-dependent structural and magnetic properties of Fe nanoparticles studied through simulation methods

The Potential Biomedical Application of NiCu Magnetic Nanoparticles

Investigating the Effect of CuO/NiO and CuO/CoO Relative Composition on the Reduction Time of (CuO)x-(NiO)(1-x) and (CuO)x-(Co3O4)(1-x) with Methane Gas as the Reducing Agent in the Synthesis of Nano-bimetallic Nix-Cu(1-x) and Cux-Co(1-x)

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