Comparative Study of Nanostructured CuSe Semiconductor Synthesized in a Planetary and Vibratory Mill

Abstract

Copper(II) selenide, CuSe was prepared from Cu and Se powders in a stoichiometric ratio by a rapid, and convenient one-step mechanochemical synthesis, after 5 and 10 min of milling in a planetary, and an industrial vibratory, mill. The kinetics of the synthesis, and the structural, morphological, optical, and electrical properties of CuSe products prepared in the two types of mill were studied. Their crystal structure, physical properties, and morphology were characterized by X-ray diffraction, specific surface area measurements, particle size distribution, scanning, and transmission electron microscopy. The products crystallized in a hexagonal crystal structure. However, a small amount of orthorhombic phase was also identified. The scanning electron microscopy revealed that both products consist of agglomerated particles of irregular shape, forming clusters with a size ~50 mm. Transmission electron microscopy proved the nanocrystalline character of the CuSe particles. The optical properties were studied using UV–Vis and photoluminescence spectroscopy. The determined band gap energies of 1.6 and 1.8 eV for the planetary- and vibratory-milled product, respectively, were blue-shifted relative to the bulk CuSe. CuSe prepared in the vibratory mill had lower resistivity and higher conductivity, which corresponds to its larger crystallite size in comparison with CuSe prepared in the planetary mill.

Mechanochemical Synthesis of Nickel Mono- and Diselenide: Characterization and Electrical and Optical Properties

“…The samples in the form of pellets were pressed from 0.41 g of NiSe and NiSe 2 powder products under the pressure of 3 t, without retention time, and at room temperature, in a laboratory hydraulic press (Specac, Fort Washington, PA, USA). The four-point test head (Ossila Ltd., Sheffield, UK) was placed on the measured pellet and fixed to its geometrical center during the measurements with a source-measure unit as reported in our previous work [ 16 ]. The probe tips were fixed at the same position and loaded with a constant contact force to obtain reproducible results.…”

“…Our several papers and a book chapter deal with the preparation of binary metal selenides and TMCs by the prospective mechanochemical synthesis that can be carried out not only by milling in a laboratory but also in an industrial mill [ 13 , 14 , 15 , 16 ]. This research describes the hitherto unreported simple mechanosynthesis of nickel mono-NiSe and diselenide NiSe 2 by high-energy milling in a planetary ball mill.…”

Ternary and Quaternary Nanocrystalline Cu-Based Sulfides as Perspective Antibacterial Materials Mechanochemically Synthesized in a Scalable Fashion

“… 55 , 56 One of the scalable alternatives to the lab-scale mechanochemical synthesis is eccentric vibratory milling 57 and it has been sufficiently applied to prepare both sulfides 58 − 65 and selenides. 66 …”

“…There are many synthetic pathways for sulfide nanoscale production, ,, among which a scalable, solvent-free one-step methodology called mechanochemical synthesis has found an inevitable place. , One of the scalable alternatives to the lab-scale mechanochemical synthesis is eccentric vibratory milling and it has been sufficiently applied to prepare both sulfides − and selenides …”

Effect of Copper Selenide Modification on the Conductivity of PA6, PA66, PAN, and PES Fibers

“…As an important semiconductor, copper selenide (Cu x Se) with nanostructure has potential applications in various fields, such as optical filters, highly efficient solar cells, superionic conductors, electro-optical devices, photothermal conversion, microwave shielding coatings, etc. [15,16].…”