Iron (Fe) and its counterparts, such as Fe2O3, Fe3O4, carbonyl iron and FeO, have attracted the attention of researchers during the past few years due to their bio-compatibility, bio-degradability and diverse applications in the field of medicines, electronics and energy; including water treatment, catalysis and electromagnetic wave interference shielding etc. In this review paper, we aimed to explore iron based materials for the prevention of electromagnetic interference (EMI) by means of both reflection and absorption processes, including the standard methods of synthesis of Fe-based materials along with the determination of EMI performance. It is customary that a proper combination of two dielectric-losses, i.e. electrical and magnetic losses, give excellent microwave absorption properties. Therefore, we focused on the different strategies of preparation of these iron based composites with dielectric carbon materials, polymers etc. Additionally, we explained their positive and negative aspects.

/pdf/review-of-electromagnetic-interference-shielding-materials-3ujlv1abb9.pdf

Review of electromagnetic interference shielding materials fabricated by iron ingredients

A high conductive 2D COF polyporphyrin (TThPP) linked by 4-thiophenephenyl groups was synthesized through an in situ chemical oxidative polymerization on the surface of copper foil. The TThPP films were used as the anode of lithium-ion battery, which exhibited high specific capacities, excellent rate performances, and long cycle lives due to the alignment of 2D polyporphyrin nanosheets, and they (i) can highly efficiently adsorb Li atoms, (ii) have short-ended paths for the fast lithium ion diffusion, and (iii) open nanopores holding electrolyte. The reversible capacity is up to 666 mAh/g. This is the first example of an organic 2D COF for an anode of lithium-ion battery and represents an important step toward the use of COFs in the next-generation high-performance lithium-ion battery.

High Conductive Two-Dimensional Covalent Organic Framework for Lithium Storage with Large Capacity.

/pdf/highly-sensitive-and-selective-chemiresistor-gas-vapor-3yyhrstnfh.pdf

Highly Sensitive and Selective Chemiresistor Gas/Vapor Sensors based on Polyaniline Nanocomposite: A comprehensive review

https://hal-univ-rennes1.archives-ouvertes.fr/hal-01202033/document

Pulsed laser deposited alumina thin films

This work is focused on the structural and morphological investigations of polyaniline and poly(o-anisidine) polymers generated in a direct current glow discharge plasma, in the vapors of the monomers, without a buffer gas, using an oblique angle-positioned substrate configuration. By atomic force microscopy and scanning electron microscopy we identified the formation of worm-like interlinked structures on the surface of the polyaniline layers, the layers being compact in the bulk. The poly(o-anisidine) layers are flat with no kind of structures on their surfaces. By Fourier transform infrared spectroscopy we identified the main IR bands characteristic of polyaniline and poly(o-anisidine), confirming that the polyaniline chemical structure is in the emeraldine form. The IR band from 1070 cm-1 was attributed to the emeraldine salt form of polyaniline as an indication of its doping with H⁺. The appearance of the IR band at 1155 cm-1 also indicates the conducting protonated of polyaniline. The X-ray diffraction revealed the formation of crystalline domains embedded in an amorphous matrix within the polyaniline layers. The interchain separation length of 3.59 A is also an indicator of the conductive character of the polymers. The X-ray diffraction pattern of poly(o-anisidine) highlights the semi-crystalline nature of the layers. The electrical conductivities of polyaniline and poly(o-anisidine) layers and their dependence with temperature are also investigated.

https://www.mdpi.com/2073-4360/9/12/732/pdf/1

Morphological and Structural Analysis of Polyaniline and Poly(o-anisidine) Layers Generated in a DC Glow Discharge Plasma by Using an Oblique Angle Electrode Deposition Configuration

Refractive index and adhesion of Al2O3 thin films obtained from different processes — a comparative study

Modification of optical properties of MgO thin films by vapour chopping

Transparent conducting undoped tin oxide thin film were prepared by chemical reactive evaporation method at various substrate temperature and post deposition heating for 30 min. Structural, electrical, optical and mechanical properties were studied. The film showed direct band gap in the range of 3.12–3.28 eV and the refractive index from 1.785 to 1.921. The minimum sheet resistance of ∼243 Ω was obtained at 450 °C. All the film showed high adhesion with highest adhesion of the film deposited at 450 °C. Post deposition heating increases the adhesion. The post deposition heated films showed decrease in transmittance and increase in band gap, refractive index and sheet resistance. The chemical reactive evaporation method is a very cost effective method for obtaining good quality undoped tin oxide thin films of lower resistance.

R.K. Puri

Papers

Refractive index and adhesion of Al2O3 thin films obtained from different processes — a comparative study

Modification of optical properties of MgO thin films by vapour chopping

Studies on undoped SnO2 thin film deposited by chemical reactive evaporation method

Effect of pH on the properties of chemical bath deposited polyaniline thin film

Improvement in mechanical and optical properties of vapour chopped vacuum evaporated PANI/PMMA composite thin film