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Article
Open AccessCorrection: Chemical Reactivity and Alteration of Pyrite Mineral in the Kubi Gold Concession in Ghana
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Article
Open AccessChemical Reactivity and Alteration of Pyrite Mineral in the Kubi Gold Concession in Ghana
Pyrite is the most common among the group of sulfide minerals in the Earth and abundant in most geological settings. This gangue mineral in association with garnet, hematite, magnetite, and other sulfide miner...
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Article
Open AccessPathfinder elements and indicator minerals of Au from the Kubi Gold ore deposits in Ghana
The Au mineralization in the Kubi Gold Mining Area in the Birimian of Ghana is associated with garnet (about 85 vol.%), magnetite, pyrrhotite, arsenopyrite, and sulfide minerals, as well as quartz with gold an...
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Article
Open AccessEffect of O/N content on the phase, morphology, and optical properties of titanium oxynitride thin films
Phase formation, morphology, and optical properties of Ti(O,N) thin films with varied oxygen-to- nitrogen ration content were investigated. The films were deposited by magnetron sputtering at 500 °C on Si(100)...
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Article
Open AccessSuppression of the transition to superconductivity in crystal/glass high-entropy alloy nanocomposites
Superconducting high entropy alloys (HEAs) may combine extraordinary mechanical properties with robust superconductivity. They are suitable model systems for the investigation of the interplay of disorder and ...
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Article
Open AccessElectrochemical Lithium Storage Performance of Molten Salt Derived V2SnC MAX Phase
Small size V2SnC MAX phase was prepared by the molten salt method.
V2SnC MAX phase electrode is a...
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Article
Author Correction: A general Lewis acidic etching route for preparing MXenes with enhanced electrochemical performance in non-aqueous electrolyte
A Correction to this paper has been published: https://doi.org/10.1038/s41563-021-00925-4.
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Article
Open AccessCharacterization and identification of Au pathfinder minerals from an artisanal mine site using X-ray diffraction
Gold-associated pathfinder minerals have been investigated by identifying host minerals of Au for samples collected from an artisanal mining site near a potential gold mine (Kubi Gold Project) in Dunkwa-On-Off...
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Article
A general Lewis acidic etching route for preparing MXenes with enhanced electrochemical performance in non-aqueous electrolyte
Two-dimensional carbides and nitrides of transition metals, known as MXenes, are a fast-growing family of materials that have attracted attention as energy storage materials. MXenes are mainly prepared from Al...
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Article
Open AccessStructural and mechanical properties of amorphous AlMgB14 thin films deposited by DC magnetron sputtering on Si, Al2O3 and MgO substrates
AlMgB14 coatings have been deposited by DC magnetron sputtering from elemental targets on Si (001), Al2O3 (0001) and MgO (001) substrates at temperatures in the range of 25–350 °C. The structural and mechanical p...
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Article
Open AccessPhase evolution of radio frequency magnetron sputtered Cr-rich (Cr,Zr)2O3 coatings studied by in situ synchrotron X-ray diffraction during annealing in air or vacuum
The phase evolution of reactive radio frequency (RF) magnetron sputtered Cr0.28Zr0.10O0.61 coatings has been studied by in situ synchrotron X-ray diffraction during annealing under air atmosphere and vacuum. The ...
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Article
Open AccessFormation mechanism and thermoelectric properties of CaMnO3 thin films synthesized by annealing of Ca0.5Mn0.5O films
A two-step synthesis approach was utilized to grow CaMnO3 on M-, R- and C-plane sapphire substrates. Radio-frequency reactive magnetron sputtering was used to grow rock-salt-structured (Ca, Mn)O followed by a 3-h...
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Chapter
Transition-Metal-Nitride-Based Thin Films as Novel Thermoelectric Materials
The last several years have seen a rise in the interest in early transition-metal and rare-earth nitrides, primarily based on ScN and CrN, for energy harvesting by thermoelectricity and piezoelectricity. This ...
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Chapter
The Mn+1AXn Phases: The Precursors for MXenes
This chapter gives an overview of the class of layered, machinable, Mn+1AXn or MAX, phases (where M = early transition metal; A = A-group element, e.g., Al or Si; and X = C or N) precursor to MXene. These materia...
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Chapter
Non-MAX Phase Precursors for MXenes
MXenes, as the new family of two-dimensional materials, have attracted extensive attention due to their widespread potential applications. To enrich the MXene family becomes an important research goal in recen...
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Article
Synthesis of Ti3AuC2, Ti3Au2C2 and Ti3IrC2 by noble metal substitution reaction in Ti3SiC2 for high-temperature-stable Ohmic contacts to SiC
The large class of layered ceramics encompasses both van der Waals (vdW) and non-vdW solids. While intercalation of noble metals in vdW solids is known, formation of compounds by incorporation of noble-metal l...
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Article
Open AccessPassive films on nanocomposite carbide coatings for electrical contact applications
Nanocomposite transition metal carbide/amorphous carbon coatings (Me-C/a-C) deposited by magnetron sputtering have excellent electrical contact properties. The contact resistance can be as low as that of noble...
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Article
Model for electron-beam-induced crystallization of amorphous Me–Si–C (Me = Nb or Zr) thin films
We use transmission electron microscopy (TEM) for in situ studies of electron-beam-induced crystallization behavior in thin films of amorphous transition metal silicon carbides based on Zr (group 4 element) an...
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Article
Beam-induced crystallization of amorphous Me–Si–C (Me = Nb or Zr) thin films during transmission electron microscopy
We report that an electron beam focused for high-resolution imaging rapidly initiates observable crystallization of amorphous Me–Si–C films. For 200-keV electron irradiation of Nb–Si–C and Zr–Si–C films, cryst...
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Article
Electrical resistivity of Tin+1ACn (A = Si, Ge, Sn, n = 1–3) thin films
We have investigated the electrical resistivity of (0001)-oriented Tin+1ACn (A = Si, Ge, Sn, n = 1–3) thin films deposited by magnetron sputtering onto Al2O3(0001) substrates at temperatures ranging from 500 to 9...
