Dielectric and electrical characterization of hematite (α-Fe2O3) nanomaterials synthesized by thermal decomposition of iron(III)citrate

Kundu, Sani; Sarkar, Toton; Bhattacharjee, Ashis

doi:10.1007/s00339-023-07000-6

Appl. Phys. A

2023

DOI: 10.1007/s00339-023-07000-6

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Dielectric and electrical characterization of hematite (α-Fe2O3) nanomaterials synthesized by thermal decomposition of iron(III)citrate

Sani Kundu,

Toton Sarkar,

Ashis Bhattacharjee

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2024

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Cited by 3 publications

References 46 publications

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Dielectric Properties of Pristine and Green‐Synthesized Hematite Nanomaterials Vis‐À‐Vis Their Dependence on Porosity and Particle Size

Sarkar,

Kundu,

Bhattacharjee

2024

Applied Research

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Hematite is obtained using different concentrations of P. tuberosa flower extract. XRD and Raman studies confirm the formation of nanometric size (20–30 nm) and the corundum structure. Particle size depends on the extent of flower extract used for synthesis. Frequency and temperature dependent dielectric constant, dielectric loss, ac/dc conductivity and electric modulus have been explored. Large dielectric constant values (6 × 103−40 × 103) at low frequency under room temperature are observed. Dielectric constant () depends on frequency, temperature, particle size and porosity. The nature of the frequency dependence of can be explained with the help of the Maxwell‐Wagner‐Koop's theory. Correlation between particle size and dielectric constant is attributed to significant lattice distortion resulting from reduced grain size. AC conductivity is analyzed with Jonscher's power law, and correlated‐barrier‐hopping type of conduction mechanism is proposed in these nanomaterials. Temperature dependence of DC conductivity confirms semiconducting behavior of hematite. Investigation into the electric modulus reveals that both electrical conduction and dielectric polarization are governed by a common mechanism. Present study explores into the process of crystal growth influenced by the plant extract and examines its impact on the dielectric property.

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Dielectric Properties of Pristine and Green‐Synthesized Hematite Nanomaterials Vis‐À‐Vis Their Dependence on Porosity and Particle Size

Sarkar,

Kundu,

Bhattacharjee

2024

Applied Research

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Synthesis and structural characterization of ZnS quantum dots (< 2 nm) vis-à-vis studies on their spectroscopic and dielectric properties

Tudu,

Sarkar,

Kundu

et al. 2024

J Mater Sci: Mater Electron

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Microstructure Design and Dimensional Engineering of Nanomaterials for Electromagnetic Wave Absorption and Thermal Insulation

Zhao,

Ye,

Huang

et al. 2024

ACS Appl. Mater. Interfaces

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Multifunctional materials integrated with electromagnetic wave absorption (EWA), thermal insulation, and lightweight properties are urgently indispensable for the flourishing advancement of space technology, which can simultaneously prevent electromagnetic detection and resist aerodynamic heating. To achieve excellent synergistic EWA and thermal insulation performance, the elaborate regulate the microstructure and dimension of nanomaterials has emerged as a captivating research direction. However, comprehending the structure−property relationships between microstructure, electromagnetic response, and thermal insulation mechanisms remains a significant challenge. Herein, a comprehensive perspective focuses on the microstructure design encompassing various dimensions of nanomaterials, providing a comprehensive understanding of correlations among structure, EWA, and thermal insulation. First, the cutting-edge mechanisms of EWA and thermal insulation are elaborated, followed by the relationship between the dimensions of nanomaterials. Moreover, the synergistic design methods of EWA and thermal insulation are explored. Lastly, this review summarizes the corresponding shortcomings and issues of current EWA-integrated thermal insulation materials and proposes breakthrough directions for the creation of materials with superior performance.

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Dielectric and electrical characterization of hematite (α-Fe2O3) nanomaterials synthesized by thermal decomposition of iron(III)citrate

Cited by 3 publications

References 46 publications

Dielectric Properties of Pristine and Green‐Synthesized Hematite Nanomaterials Vis‐À‐Vis Their Dependence on Porosity and Particle Size

Dielectric Properties of Pristine and Green‐Synthesized Hematite Nanomaterials Vis‐À‐Vis Their Dependence on Porosity and Particle Size

Synthesis and structural characterization of ZnS quantum dots (< 2 nm) vis-à-vis studies on their spectroscopic and dielectric properties

Microstructure Design and Dimensional Engineering of Nanomaterials for Electromagnetic Wave Absorption and Thermal Insulation

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