Trigonal selenium is a semiconducting van der Waals solid that consists of helical atomic chains. We studied the mobility and decay dynamics of excess electrons and holes moving along the selenium chains. Excess charge carriers were generated by irradiation of powdered selenium with 3 MeV electron pulses. Their mobility and decay via trapping or recombination was studied by time-resolved microw...

The metal-reducing bacteria Geobacter sulfurreducens, Shewanella oneidensis and Veillonella atypica, use different mechanisms to transform toxic, bioavailable sodium selenite to less toxic, non-mobile elemental selenium and then to selenide in anaerobic environments, offering the potential for in situ and ex situ bioremediation of contaminated soils, sediments, industrial effluents, and agricul...

Selenium (Se) is an essential element for human health in trace amounts but harmful excess. Most plants contain a fairly low Se and crop supplements ensure adequate levels nutritional needs. Food the primary source of humans due to differences eating habits, its intake varies considerably. In body, selenium deficiency can lead diseases endocrine, musculoskeletal, cardiovascular, reproductive, n...

The recent ability to integrate semiconductor-based optoelectronic functionalities within thin fibers is opening intriguing opportunities for flexible electronics and advanced textiles. The scalable integration of high-quality semiconducting devices within functional fibers however remains a challenge. It is difficult with current strategies to combine high light absorption, good microstructure...

Abstract The melt-grown, indium and selenium co-doped Bi 2 Te 3 single-crystal system is studied with a purpose to improve analyze the thermoelectric performance in low near room-temperature range (10–400 K). influence of co-dopants on crystalline perfection, symmetry, dislocation, quality investigated using high-resolution X-ray diffraction. surface morphological features show existence small-...

In order to reduce the thermal conductivity of CoSbS, a newly developed thermoelectric semiconductor, we have aimed at intentionally induce atomic disorder in its structure. This endeavor was guided by Density Functional Theory(DFT) calculations which indicated that substituting sulfur with selenium might be easily achievable experimentally because of the low formation energy of this point defe...

Objectives: The primary objective of this investigation is to make a systematic study on the impact thickness optical properties, such as energy gap, absorption coefficient, density etc., for selenium thin films. Understanding band gap and its influence film utmost importance in acquiring intended electrical characterization semiconducting Materials methods: Ultra-purity (99.99 %) was deposited...

In this work; Cyclic-Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS) were used to study the electrodeposition kinetic of selenium films in potentiostatic mode from aqueous solution containing dioxide sodium citrate at pH = 4.2. Semiconducting proprieties obtained deposits investigated by Mott-Schottky measurements whereas optical ones performed UV–Visible spectrophotometry. Th...