Nanomaterials Science & Engineering

Nanostructures and applications

2024-05-14T09:25:20+01:00

Nanotechnology is an interdisciplinary area that studies materials and structures of billionths in size and their uses. Nanomaterials are the keystones of nanotechnology and have exclusive electrical, magnetic and optical properties. What makes nanotechnology so stimulating is that materials perform contrarily in this dimension than in the macro world. The weight/power proportion, magnetic and optical possessions as well as conductivity alter meaningfully as you change from the macro dimension to the nano dimension. In this investigation, after giving overall data about nanomaterials, nanosystems, nanomachines, nanorobots and nanosystems from nanostructures were examined. Then, from nanostructure applications to the automotive industry, energy. defense and environmental applications were examined. Finally, nanofuture for nanostructures is discussed.

The effects of black tea extracts on the corrosion inhibition of mild steel in acidic solution

2024-05-14T09:25:18+01:00

It was examined to evaluate the effectiveness of extracted tea leaves as the green corrosion inhibitor that contains mild steel in acidic solvents. The test specimens were dissolved in an acidic solution with different concentrations of the extracted tea leaves. After 3 hours of immersion, the corrosion rate (CR) was measured. The results showed that a concentration of 1000 mg/l caused a significant inhibition in corrosion rate as compared to control. To see how black tea (BT) extract affected mild steel corrosion in 1 M HCl, it was subjected to a loss of weight procedure. The corrosion level and the inhibitor's performance were examined at five different BT extract concentrations that included 0.4, 1, 1.4, 2, and 2.4 g/l. According to the findings, an increase in BT concentration at every temperature decreased CR. As a result of the rise in kinetic activities of the metal surface interface, typically, temperature elevation leads to an increase in CR at every concentration of BT extract. The study's findings showed that adding 2.4 g/l of inhibition efficiency resulted in a temperature of 323 K, resulting in 84.95% inhibition efficiency. The small activation energy (Ea) of 8.74 and 11.45 kJ/mole reflected the barrier layer properties of BT extract and its chemical interactions on mild steel surfaces. The thermodynamic parameter revealed the spontaneous interaction between BT extract species and steel surface as k_ad rose from 0.929 to 1.728 (g/l)^-1.

Impurity and Vacancy analysis in Zig-Zag (8,0) carbon nanotubes

2024-05-14T09:25:17+01:00

Nanoscience and nanotechnology have generated billions of dollars annually, generating jobs and new products. This is an area that involves the study and manipulation of nanoscale materials (nanomaterials, on the order of 10^-9 m). One class of nanomaterials that has aroused significant interest in the scientific community are those carbon compounds (examples include graphene, carbon nanotubes and fullerenes), especially due to their potential applications in industry. In the present work, we carried out a study on defects (absence of carbon atoms) and Ni doping in the electronic properties of a zigzag carbon nanotube containing 32 carbon atoms. Our results indicated semiconductor behavior when two vacancies are present in the structure and also an increase in the energy level of the conduction band, valence band and Fermi level when the systems are doped with Ni. Finally, for systems doped with Ni, there was a greater probability of charge exchange occurring between the 2p orbitals of carbon and the 2p orbitals of carbon to the 3d orbitals of Nickel.

Nanomaterials Science & Engineering, Volume 6, Number 1, May 2024

2024-05-14T09:25:08+01:00