Nanostructured copper and copper oxide thin films fabricated by hydrothermal treatment of copper hydroxide nitrate

Ghotbi, Mohammad Yeganeh; Rahmati, Zahra

doi:10.1016/j.matdes.2015.07.081

Cited by 34 publications

(9 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the Cu 2p 3/2 binding energies given in the literature [36,37], the following three copper species can be identified on the surface of the samples: Cu 2 S (932.20 eV), CuO (933.60 eV), and CuS (935.00 eV). The CuO may be formed through the dehydration of the adsorbed copper hydroxide during the vacuum-drying process [38]. The Cu 2 S is generated via the reduction of CuS, according to the results of previous research [39].…”

Section: Surface Copper Analysismentioning

confidence: 77%

Effect of Ammonium Chloride on the Efficiency with Which Copper Sulfate Activates Marmatite: Change in Solution Composition and Regulation of Surface Composition

et al. 2018

View full text Add to dashboard Cite

Zinc sulfide minerals are the primary choice for zinc extraction and marmatite is one of the two most common zinc sulphide minerals (sphalerite and marmatite), therefore it is of great significance to study and optimize the flotation of marmatite. To improve the activation of copper sulfate on marmatite, a method involving the addition of ammonium chloride is devised. The method has been proven to be an effective way of improving the activation efficiency of copper sulfate towards marmatite under alkaline conditions. The strengthening mechanism was studied using micro-flotation, adsorption test, X-ray photoelectron spectroscopy, and by analyzing changes in solution composition. Flotation test results show that the activation effect of the copper sulfate towards marmatite is enhanced with the addition of ammonium chloride. According to the results of the adsorption measurements and X-ray photoelectron spectroscopy analysis, when the marmatite surface is activated using copper sulfate with added ammonia chloride, it adsorbs more copper sulfide and less copper hydroxide and zinc hydroxide. These changes in surface composition are believed to occur via the following process: NH 3 (aq) promotes the dissolution of zinc hydroxide and then facilitates the conversion of surface copper hydroxide to copper sulfide. In addition, the occurrence of Cu(NH 3) n 2+ can promote the adsorption of copper ions (Cu 2+ can be stored as Cu(NH 3) n 2+ via complexation, and then, when the concentration of copper ions decreases, Cu 2+ can be released through the decompositionof Cu(NH 3) n 2+. Hence, the copper ion concentration can be maintained and this can facilitate the adsorption of Cu 2+ on marmatite). Based on a comprehensive analysis of all our results, we propose that adding ammonium chloride to the copper sulfate changes the solution components (i.e., the presence of NH 3 (aq) and Cu(NH 3) n 2+) and then regulates the surface composition of marmatite. The change in surface composition improves the hydrophobicity of mineral surface and this leads to an improvement in activation of marmatite.

show abstract

Section: Surface Copper Analysismentioning

confidence: 77%

Effect of Ammonium Chloride on the Efficiency with Which Copper Sulfate Activates Marmatite: Change in Solution Composition and Regulation of Surface Composition

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Cu is an important metallic material due to its excellent electrical conductivity, only second to silver but more abundant and affordable. Therefore, thin films of metallic Cu have been identified as promising conductive materials and extensively used in microelectronics [1]. Leading techniques, such as radio-frequency sputtering [2] and chemical vapor deposition [3], have been found to be capable of depositing Cu thin films of good quality.…”

Section: Introductionmentioning

confidence: 99%

Highly-Conductive and Well-Adhered Cu Thin Film Fabricated on Quartz Glass by Heat Treatment of a Precursor Film Obtained Via Spray-Coating of an Aqueous Solution Involving Cu(II) Complexes

et al. 2018

View full text Add to dashboard Cite

A Cu thin film on a quartz glass substrate was fabricated by a wet process involving heat-treatment of a precursor film spray-coated with an aqueous ammonia solution containing Cu(HCOO)2∙4H2O and Cu(II) complex of ethylenediamine-N,N,N′N′-tetraacetic acid. The precursor film that formed on the substrate at 180 °C in air was heat-treated at 350 °C and post annealed at 400 °C by placing an identical-sized glass on top, under Ar gas flow in a tubular furnace. X-ray diffraction pattern of the resultant film showed only peaks of Cu. The resultant film of 100 nm thickness has an adhesion strength and electrical resistivity of 37(7) MPa and 3.8(6) × 10−5 Ω cm, respectively. The images of atomic force and field-emission scanning-electron microscopies revealed a film of well-connected Cu grains with an average surface roughness of 11 nm. The reflectance of the thin film is more than 90% in the far-infrared region. The film’s chemical composition was also examined by using Auger electron spectroscopy.

show abstract

“…There are different preparations, which were considered, including wet and dry methods were used for the deposition of metal/semiconductor thin films. These methods, such as atomic layer deposition (ALD), photochemical deposition [11], physical vapour deposition (PVD) [12], in addition to molecular precursor [13], ion beam-assisted deposition (IBAD) [14] and hydrothermal methods [15] were applied. When the same thin film is deposited by different techniques, these techniques give the film with different phase structures, degree of crystallinity and variable optoelectronic properties.…”

Section: Introductionmentioning

confidence: 99%

Eco-friendly method to synthesize and characterize 2D nanostructured (1,2-bis(diphenyl-phosphino)ethyl) tungsten tetracarbonyl methyl red/copper oxide di-layer thin films

2018

View full text Add to dashboard Cite

Three-layer thicknesses (T 1 = 50, T 2 = 75 and T 3 = 100 nm) of 1,2-bis(diphenylphosphino)ethyl tungsten tetracarbonyl methyl red (DPE-W-MR) were deposited onto the CuO thin film (50 nm) to produce DPE-W-MR/CuO di-layer thin films by sol-gel spin-coating technique. The composition and the chemical structure of the as-prepared thin films were characterized using various techniques including elemental analysis, Fourier transform infrared spectroscopy, 1 H-NMR and X-ray diffraction (XRD). Scanning electron microscopy was used to investigate the size and shape of the CuO nanoparticles and the fabricated thin films. The films are crystalline as evidenced by the XRD pattern and DPE-W-MR has an orthorhombic crystal system. The crystallite size was calculated from an analysis of the line broadening features using the Scherrer formula; the average crystallite sizes of DPE-W-MR/CuO di-layer thin films are 52.92, 56.24 and 72.26 nm for T 1 , T 2 and T 3 , respectively. Thermogravimetric analysis and the thermal curve of DPE-W-MR complex were studied. Optical properties of DPE-W-MR/CuO di-layer thin films are discussed. The optical band gap energies of DPE-W-MR di-layer thin films/CuO decreased (2.25, 2.1 and 1.88 eV) as the film thickness increased (from T 1 to T 3). Based on the optical results and the quantum confinement effects, the DPE-W-MR/CuO di-layer thin films may be candidates as semiconductor materials for optoelectronic devices.

show abstract

Nanostructured copper and copper oxide thin films fabricated by hydrothermal treatment of copper hydroxide nitrate

Cited by 34 publications

References 25 publications

Effect of Ammonium Chloride on the Efficiency with Which Copper Sulfate Activates Marmatite: Change in Solution Composition and Regulation of Surface Composition

Effect of Ammonium Chloride on the Efficiency with Which Copper Sulfate Activates Marmatite: Change in Solution Composition and Regulation of Surface Composition

Highly-Conductive and Well-Adhered Cu Thin Film Fabricated on Quartz Glass by Heat Treatment of a Precursor Film Obtained Via Spray-Coating of an Aqueous Solution Involving Cu(II) Complexes

Eco-friendly method to synthesize and characterize 2D nanostructured (1,2-bis(diphenyl-phosphino)ethyl) tungsten tetracarbonyl methyl red/copper oxide di-layer thin films

Contact Info

Product

Resources

About