نتایج جستجو برای: cu doped zns
تعداد نتایج: 110881 فیلتر نتایج به سال:
5% Fe- and Mn-doped nano-ZnS (Zn0.95A0.05S, A?=?Fe or Mn) was prepared using the thermolysis technique. The effect of Fe Mn doping on lattice parameter, crystallite size, microstrain examined applying Rietveld refinement. analysis showed incorporation substitutionally for Zn ions; a result confirmed by Fourier transforms infrared spectroscopy spectra from shift in vibration bands upon doping. e...
Quasiparticle tunneling spectra of both hole-doped (p-type) and electron-doped (n-type) cuprates are studied using a low-temperature scanning tunneling microscope. The results reveal that neither the pairing symmetry nor the pseudogap phenomenon is universal among all cuprates, and that the response of n-type cuprates to quantum impurities is drastically different from that of the p-type cuprat...
Substitution of Li for Cu in La2Cu12xLixO4 donates holes; at x 0.5 the Li ions form an ordered superlattice which isolates individual CuO4 plaquettes from one another, and the number of doped holes is sufficient that each plaquette is occupied. Above 170 K, an activated temperature dependence of the Cu nuclear spin relaxation rate reveals a magnetic excitation of the doped-hole state with an ...
The nanoparticles of gold doped with various percentage of copper (Cu 10%, 25%, 75%) were synthesized by wet-chemical method at room temperature. Copper (II) sulfate and gold (III) chloride trihydride was taken as the metal precursor and ascorbic acid as a reducing agent and anhydride maleic as surfactant. The reaction is performed with high-speed stirring at room temperature under nitrogen atm...
Chalcogenide semiconducting systems are of growing interest for mid-temperature range (~500 K) thermoelectric applications. In this work, Ge20Te77Se₃ glasses were intentionally crystallized by doping with Cu and Bi. These effectively-crystallized materials of composition (Ge20Te77Se₃)100-xMx (M = Cu or Bi; x = 5, 10, 15), obtained by vacuum-melting and quenching techniques, were found to have m...
Abstract The aim of the present study was to prepare ZnS nanoparticles co-doped with Li + -Cs , were synthesized using a chemical co-precipitation method. ZnS-(Li ) nanoparticle’s capped L- Arginine and reduced sodium sulphide. main advantage this method is semiconductor nanomaterial wide band gap are chemically stable over long time. as prepared characterised by X-Ray Diffraction technique for...
We propose a codoping method of using acceptors and donors simultaneously as a solution to the crucial doping problem, or unipolarity, of wide-band-gap semiconductors which exhibit an asymmetry in their ability to be doped as n-type or p-type. The deliberate codoping of donors is essential for the enhancement of acceptor incorporation, decrease of the binding energy of the acceptor impurity and...
Nowadays efficient down conversion for white light emission is mainly based on rare-earth doped phosphors or cadmium-containing quantum dots. Although they exhibit high luminescence efficiency, the rare-earth mining and cadmium pollution have so far led to extremely high environmental cost, which conflicts the original purpose of pursuing efficient lighting. Here, we explore a new strategy to a...
A combination of electron microscopy, focused ion beam and conductive atomic force microscopy techniques have been used to study the microstructure, oxide scale development, and electrical behavior of a Cu–9 at.% La alloy. The as-cast alloy exhibits a eutectic microstructure comprising 30 vol.% Cu rods in a Cu6La matrix. The eutectic colonies exhibit a singular orientation relationship with [01...
Sn doped CuO nanotubes were synthesized by thermal oxidization of Cu/SnO(2) core-shell nanowires in air through the Kirkendall effect. The Cu/SnO(2) core-shell nanowires were sequentially electrodeposited by forming a SnO(2) shell followed by electrodeposition of the Cu core. After thermal treatment in air, the core-shell Cu/SnO(2) (13 +/- 2 nm thick shell on 128 +/- 15 nm in diameter core) nan...
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