α-Fe2O3 Nanostructures: Bridging Morphology with Magnetic and Antimicrobial Properties

IF 2.6 4区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY
ChemNanoMat Pub Date : 2025-04-21 DOI:10.1002/cnma.202500066
Ambati Mounika Sai Krishna, Nilja George, Vadupu Lavanya, Durgesh Kumar, Avinash Chaurasiya, Hasibur Rahaman, S. N. Piramanayagam, Rajdeep Singh Rawat, Goutam Kumar Dalapati, Writoban Basu Ball, Siddhartha Ghosh, Sabyasachi Chakrabortty
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引用次数: 0

Abstract

Highly crystalline hematite (α-Fe2O3) nanostructures (NSs) with distinct morphology hold vital significance, not only for fundamental knowledge of magnetic properties but also offering potential applications from biomedical to data storage to semiconductor industry, etc. α-Fe2O3 NSs with various shapes are examined to reveal the intrinsic relationship between the shape anisotropy and magnetic properties. Herein, different morphologies of α-Fe2O3 NSs, such as spherical, cubic, plate-like, rhombohedral, and hexagonal bipyramid are synthesized, by controlled hydrothermal method. The impact of shape and size on the optical and structural characteristics through UV–vis absorption spectroscopy and X-ray diffraction is analyzed. Advanced nanomaterial techniques such as transmission electron microscopy are utilized to explore and confirm the morphology and size of NSs. Subsequently magnetic properties of the α-Fe2O3 NSs, such as magnetic saturation (Ms), coercivity (Hc), and remanent magnetization (Mr), are measured. Careful analysis of magnetic data reveals Morin transition around 200 K for cubic, plate-like, and rhombohedral samples, whereas the spherical and hexagonal bipyramid samples illustrate the superparamagnetic behavior in the temperature range of 150–300 K. Finally, the antibacterial characteristics of NSs against Escherichia coli using a microplate reader for monitoring the bacterial growth are investigated.

α-Fe2O3纳米结构:具有磁性和抗菌性能的桥接形态
具有不同形貌的高结晶赤铁矿(α-Fe2O3)纳米结构(NSs)不仅对磁性能的基础知识具有重要意义,而且在生物医学、数据存储和半导体工业等领域具有潜在的应用前景。研究了不同形状的α-Fe2O3纳米结构,揭示了形状各向异性与磁性能之间的内在关系。本文采用控制水热法制备了球形、立方、片状、菱形和六方双棱锥等不同形貌的α-Fe2O3纳米颗粒。通过紫外-可见吸收光谱和x射线衍射分析了形状和尺寸对光学和结构特性的影响。利用先进的纳米材料技术,如透射电子显微镜来探索和确认纳米颗粒的形态和尺寸。随后测量了α-Fe2O3纳米碳化硅的磁性能,如磁饱和度(Ms)、矫顽力(Hc)和剩余磁化强度(Mr)。对磁性数据的仔细分析表明,立方体、板状和菱形样品的Morin跃迁在200 K左右,而球形和六边形双金字塔样品在150-300 K的温度范围内表现出超顺磁性行为。最后,利用微孔板检测仪检测NSs对大肠杆菌的抑菌特性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
ChemNanoMat
ChemNanoMat Energy-Energy Engineering and Power Technology
CiteScore
6.10
自引率
2.60%
发文量
236
期刊介绍: ChemNanoMat is a new journal published in close cooperation with the teams of Angewandte Chemie and Advanced Materials, and is the new sister journal to Chemistry—An Asian Journal.
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