Aluminum oxide nanotubes fabricated via laser ablation process: Application as superhydrophobic surfaces

Eskandari, Mohammad Jafari; Araghchi, Masoud; Daneshmand, Hamid

doi:10.1016/j.optlastec.2022.108420

Cited by 11 publications

(12 citation statements)

References 55 publications

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“…The exchange-correlation potential was based on the Perdew-Burke and Ernzerhof (PBE) parameterized generalized gradient approximations (PBE-GGA) method [16]. In this work (6,6) SWSiCNT and (6,0) SWZSiCNTs were chosen as the representative model of armchair and zigzag SWSiCNTs respectively. To ensure balance between computational cost and accuracy, we have used 20 atoms each of Silicon and carbon to form a cluster of Si 20 C 20 nanotubes making a total of 40 atoms.…”

Section: Methodsmentioning

confidence: 99%

“…After discovery of carbon nanotubes, a lot of scientific investigations were continuously in process to bring nanotubes of other elements to the applications for next generation's sustainability science and technology. For example literature results showed that properties of boron nitride nanotubes [4], zinc oxide nanotubes [5], aluminum oxide [6] nanotubes and magnesium oxide nanotubes were investigated [7] these are nanotubes obtained from their 2D hexagonal metal oxides. Recently, the new tubular structures of nanometer-sized 1D material called silicon carbide nanotubes (SiCNTs) were synthesized by substitution reaction in which Si atoms replace half of the C atoms in CNTs [8] , unlike CNTs, they were found to be semiconducting irrespective of chirality [9].…”

Section: Introductionmentioning

confidence: 99%

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Effects of oxygen absorption on the electronic and optical properties of armchair and zigzag Silicon Carbide Nanotubes (SiCNTs)

Itas¹,

Suleiman²,

Ndikilar³

et al. 2022

Phys. Scr.

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Investigation of the effects of oxygen absorption on the two types of single walled silicon carbide nanotubes (SWSiCNTs) with different chiral angles were done. Our calculations were performed using density functional theory with quantum ESPRESSO and YAMBO codes. Changes in electrical and optical properties were analyzed after introducing two molecules of oxygen as absorbing gas to both armchair and zigzag nanotubes. Results demonstrated a new future by SWSiCNT in which oxygen absorption significantly closes the band gap which transformed the materials from semiconducting to metallic. This future revealed its potential for application as automobile gas switches for air conditioners. Results from optical calculations revealed that zigzag SiCNT is not optically potential above 20 eV, generally, the (6, 6) SWSiCNT demonstrate higher transmission with and without oxygen absorption in the ultraviolet region. The first absorption peaks appeared within the range of 1 eV to 3.4 eV for all systems, there is higher absorption by the oxygen absorbed (6, 6) SWSiCNT than the oxygen absorbed (6, 0) SWZSiCNT. This demonstrates that armchair form of SWSiCNT absorbs gases more than the zigzag form. The absorption peaks can be seen to fall above 3.5 eV and then rise again up to 10 eV, this behavior justifies the nanotubes potential in automobile day light sensors.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of oxygen absorption on the electronic and optical properties of armchair and zigzag Silicon Carbide Nanotubes (SiCNTs)

Itas¹,

Suleiman²,

Ndikilar³

et al. 2022

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…The samples were placed in the UV chamber for a maximum duration of 20 h at 40 °C ± 10 °C. The long-term air storage and thermal stabilities of the samples were respectively estimated by keeping the samples in air for months and recording WCAs, 27 and exposing the samples at 150 °C for 24 h, and recording the WCAs after exposure. 20,34,35 The mechanical durability of the SHSs was examined with abrasion tests reported elsewhere.…”

Section: Methodsmentioning

confidence: 99%

“…10 As of now, there are a great number of methods adopted for the fabrication of SHSs, such as chemical vapour deposition, 11 micro-arc oxidation, 12 sol-gel technique, 13 chemical etching , [14][15][16][17] solution-immersion method, 18 spin coating, 19 wetchemical grafting, 20,21 layer-by-layer self-assembly, 22,23 chemical and electrochemical deposition [24][25][26] and laser-ablation. 27,28 Physical adsorption of the constituents rendering the base material surface superhydrophobic is possible in dip-coating and spin-coating methods, but the surface fabricated may not have good mechanical stability. 29,30 The methods like chemical vapour deposition, microarc oxidation, layer-by-layer self-assembly and hydrothermal reactions are limited only to laboratory scales.…”

mentioning

confidence: 99%

Fabrication of Superhydrophobic Surface on Anodized Aluminum Through a Wet-Chemical Route

Kumaravel¹,

Srikandan²,

Maruthamani³

2023

ECS J. Solid State Sci. Technol.

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Fabrication of superhydrophobic surfaces on anodized aluminum substrates by wet-chemical grafting using cost-effective chemicals through a simple immersion process is described. Formation of formate-alumoxane is possible by treating the anodized and sealed aluminum substrate with formic acid at around 50°C. On treatment with sodium salts of higher-order carboxylic acids (stearic acid, lauric acid, and palmitic acid), the formate ions are replaced by higher-order carboxylates. A possible bonding mechanism of the longer chain carboxylic acid with aluminium surfaces has been suggested based on infrared reflection–absorption spectroscopy and X-ray photoelectron spectroscopy studies. The as-prepared superhydrophobic aluminum substrates exhibited a static water contact angle of up to 167° with a sliding angle of 6°, with decent resistance against abrasion in addition to good UV, environmental and thermal stabilities. Aluminium substrates of any size, shape, and surface finish can be easily rendered robust and superhydrophobic without the use of expensive chemicals and sophisticated machinery.

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“…High purity, very few structural defects Intensive cost and labor required [38] Table 1. Some salient merits and demerits of different CNTs synthesis routs.…”

Section: Chemical Vapor Depositionmentioning

confidence: 99%

Modification and Application of Carbon Nanotubes for the Removal of Emerging Contaminants from Wastewater: A Review

Taleb¹,

Al-sharif²,

Al-mutair³

et al. 2023

Carbon Nanotubes - Recent Advances, New Perspectives and Potential Applications

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The emerging contaminants (ECs) refer to chemical compounds either naturally originated or synthetically modified having potential toxic effects to the environment. The ECs include different pollutants such as biocides, pesticides, pharmaceuticals (antibiotic, analgesics, and hormones) and personal care products (cosmetics, fragrances, and hygiene products). The ECs are considering the top priority pollutants by the European Union (EU) and the United States Environmental Protection Agency (US EPA). Among other materials, the carbon nanotubes (CNTs) are one of widely used materials for the removal of ECs applying diverse techniques of wastewater decontamination. The momentous advancement of these functional nanostructured materials has found to be cost-effective, reusable, smart materials for the application of ECs removal. The aim of this chapter was to explore the modification routes and advancement of functionalization of CNTs with other functional groups by the reported works. The possible mechanistic insight of ECs removal reactions was also evaluated applying different methods for decontamination reported in the past studies. This review will be significant sources of information of CNTs-based materials for the application of wastewater treatment especially ECs removal from wastewater and ultimate environmental remediation.

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Aluminum oxide nanotubes fabricated via laser ablation process: Application as superhydrophobic surfaces

Cited by 11 publications

References 55 publications

Effects of oxygen absorption on the electronic and optical properties of armchair and zigzag Silicon Carbide Nanotubes (SiCNTs)

Effects of oxygen absorption on the electronic and optical properties of armchair and zigzag Silicon Carbide Nanotubes (SiCNTs)

Fabrication of Superhydrophobic Surface on Anodized Aluminum Through a Wet-Chemical Route

Modification and Application of Carbon Nanotubes for the Removal of Emerging Contaminants from Wastewater: A Review

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