Preparation and characterization of iridescent Ni1-Co -containing anodic aluminum oxide films

Xu, Qin; Sun, Chunxin; Wang, Zhijun; Liu, Jingjin; Ren, Yi; Hao, Sheng-Zhen; Zhu, Jiliang; Sun, Yubao; Sun, Hongyu

doi:10.1016/j.dyepig.2017.08.031

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…CoNi alloys can be fabricated by casting or coating methods. Thin film coatings are fabricated by methods such as electrochemical deposition (electrodeposition) [8][9][10], sol-gel [11][12], chemical vapor deposition [13], spray pyrolysis [14], physical vapor deposition [15], spin coating [16], dip coating [17], sputtering [18], electroless coating [19][20]. The electrodeposition system is one of the most popular methods for the production of magnetic films and alloys.…”

Section: Introductionmentioning

confidence: 99%

Elektrodepolama ile Üretilen Co, Ni ve CoNi Alaşımlı İnce Filmlerin Yapısal ve Manyetik Özelliklerinin İncelenmesi

Özdemir

KORKMAZ

2022

ECJSE

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The production of nanoparticles as thin film coating performed with electrodeposition method is easier and cheaper than other methods. Because, thin film production can be controlled with the change of ingredients in the bath composition. In this study, Co, Ni, and CoNi alloy thin films were fabricated with electrodeposition method through the bath composition that consists of cobalt sulphate (CoSO4.7H2O), nickel sulphate (NiSO4.6H2O), nickel (II) chloride (NiCl2 6H2O) and boric acid (H3BO3). Crystal structure (XRD), morphological (SEM), elemental composition (ICP) and magnetic properties (VSM) of the fabricated thin films were investigated. Chemical properties of coating bath (CV) was examined as well. Magnetization measurements of the thin films were performed by applying magnetic fields between + 75000 Oe and -75000 Oe and then hysteresis loops were obtained. The Co, Ni, and CoNi films showed ferromagnetic material properties. Coercivity (Hc), permanent magnetization (Mr), saturation magnetization (Ms) values of these alloys were significantly affected by the amount of the cobalt, magneto crystal anisotropy and grain size. It was understood that some materials having hard and soft magnetic properties can be fabricated by controlling the bath composition.

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Section: Introductionmentioning

confidence: 99%

Elektrodepolama ile Üretilen Co, Ni ve CoNi Alaşımlı İnce Filmlerin Yapısal ve Manyetik Özelliklerinin İncelenmesi

Özdemir

KORKMAZ

2022

ECJSE

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“…Gorgeous structural colors exist widely in nature and in our lives. − On the basis of human vision, the structural colors can be divided into two classes: iridescence and noniridescence. , The iridescent structural color is typically angle-dependent from periodic nano- and microstructures, although its color appears considerably brighter than those of dyes and pigments, which could limit its applications in displays, optical devices, and sensors, which require broad viewing angles. − Noniridescence comes from amorphous colloidal nanoparticles, which are short-range ordered but long-range amorphous. This structure endows the materials with angle-independent color, while successfully avoiding the problems of chemical bleaching which widely exists in dye and pigments.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Angle-Independent Structurally Colored Films Based on CdS@SiO₂ Nanospheres

et al. 2019

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It is easy for chemical pigments produced from organic chemicals to disappear when exposed to light over time. Recently, structurally colored pigments produced by materials with high indices of refraction such as TiO2 or ZnS have attracted great attention. This study presents that CdS@SiO2 core–shell nanospheres were synthesized through a homogeneous deposition method followed with a modified Stöber method and a calcination process. Colored film assembled by pigments shows low angle dependence with high stability against degradation under environmental factors. Moreover, the structural color of CdS@SiO2 arrays was bright and tunable according to the size without changing the overall material design. Compared with the conventional method, the addition of black substances in colloidal spheres is the generally used method to realize angle-independent structural coloration. However, black materials (such as carbon blacks and acetylene black) are not stable because of the high surface energy, and usually reunite together easily, and then lead to a nonuniform distribution and significant decrease in brightness. Thus, we report self-assembly colored films with great low angle dependence but not any black substances. Moreover, the refractive index of CdS is higher than generally used PS, PMMA, and SiO2, and the SiO2 shell is poisonless. CdS@SiO2 structurally colored films have promising nonbleaching pigments and have potential applications for displays, colorimetric sensors, colorful decoration, and pigments.

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“…CoNi alaşım malzemelerin manyetik özellikleri, alaşım film içerisindeki madde miktarı ve kristal yapı özelliklerinden büyük oranda etkilenmektedir [34]. Malzemelerin manyetik özelliklerini, ters yönde zorlayıcı alan kuvveti olan koersivite (Hc) değeri, doyum manyetizasyon (Ms) değeri ve manyetik etki sonrası malzeme üzerindeki kalıcı manyetizasyon (Mr) yani artık mıknatısiyet belirlemektedir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Elektrodepolama ile Üretilen CoNi Alaşım İnce Film Kaplamaların Yapısal ve Manyetik Özellikleri Üzerine Ek Katkı Maddelerinin Etkisi

Özdemir

2019

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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In this study; CoNi alloy thin film coatings were produced by electrodeposition method without additives and using additional additives (organic coumarin and thiourea). The structural and magnetic properties of the produced thin films were investigated. When coumarin was added to the bath composition, it was determined that cobalt in the film content decreased from 67.94% to 43.82%, when it was added to thiourea, it decreased to 34.33% and both films showed amorphous properties. Magnetization measurements were performed and hysteresis curves were obtained. Figure A. Hysteresis loops obtained from magnetic measurements of CoNi alloy thin films, and SEM images Purpose: In this study; It was aimed to produce CoNi alloy thin films by using coumarin and thiourea as an additive in the electrolyte and to investigate the structural and magnetic properties. The effects of additives on the amount of substance deposited in the thin film, crystal structure and magnetic properties (coercivity, saturation magnetization and permanent magnetization) were investigated. Theory and Methods: CoNi alloy thin films were produced by electrodeposition method. A potentiostat with constant direct current and voltage control as a power source was used in the setting. Platinum wire as the opposite electrode saturated calomel electrode (SCE) as the reference electrode and aluminum substrate as the working electrode were used. The structural and magnetic properties of the produced films were investigated by CV, ICP, XRD, SEM and VSM analyzes. Results: CoNi alloy thin films were successfully deposited on aluminum substrates. XRD measurements and SEM images obtained from thin films were analyzed. Thin films deposited with the additive of organic thiourea and coumarin did not crystallize and showed amorphous properties. It was confirmed by hysteresis loops that all three thin-film coatings produced exhibited ferromagnetic material behavior. It was seen that the additives had a significant effect on the amount of material in the alloy film, crystal structure, and magnetic properties. Conclusion: Organic coumarin and thiourea additives were found to significantly change the amount of cobalt and nickel in the deposited thin-film content. The amount of cobalt and nickel material changes the crystal structure, grain size and magneto-crystal anisotropy of the thin film. By controlling these changes, it was understood that the desired soft and hard magnetic materials could be produced.

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Preparation and characterization of iridescent Ni1-Co -containing anodic aluminum oxide films

Cited by 6 publications

References 22 publications

Elektrodepolama ile Üretilen Co, Ni ve CoNi Alaşımlı İnce Filmlerin Yapısal ve Manyetik Özelliklerinin İncelenmesi

Elektrodepolama ile Üretilen Co, Ni ve CoNi Alaşımlı İnce Filmlerin Yapısal ve Manyetik Özelliklerinin İncelenmesi

Fabrication and Characterization of Angle-Independent Structurally Colored Films Based on CdS@SiO₂ Nanospheres

Elektrodepolama ile Üretilen CoNi Alaşım İnce Film Kaplamaların Yapısal ve Manyetik Özellikleri Üzerine Ek Katkı Maddelerinin Etkisi

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Preparation and characterization of iridescent Ni1-Co -containing anodic aluminum oxide films

Cited by 6 publications

References 22 publications

Elektrodepolama ile Üretilen Co, Ni ve CoNi Alaşımlı İnce Filmlerin Yapısal ve Manyetik Özelliklerinin İncelenmesi

Elektrodepolama ile Üretilen Co, Ni ve CoNi Alaşımlı İnce Filmlerin Yapısal ve Manyetik Özelliklerinin İncelenmesi

Fabrication and Characterization of Angle-Independent Structurally Colored Films Based on CdS@SiO2 Nanospheres

Elektrodepolama ile Üretilen CoNi Alaşım İnce Film Kaplamaların Yapısal ve Manyetik Özellikleri Üzerine Ek Katkı Maddelerinin Etkisi

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Fabrication and Characterization of Angle-Independent Structurally Colored Films Based on CdS@SiO₂ Nanospheres