Dopant induced RTFM and enhancement of fluorescence efficiencies in spintronic ZnS:Ni nanoparticles
Source abstract
Abstract
Abstract Diluted magnetic semiconducting (DMS) ZnS:Ni (Ni=0, 1, 3 and 5 at%) nanoparticles were synthesized by the refluxing technique at 80 °C. X-ray diffraction studies showed that undoped ZnS and Ni doped ZnS nanoparticles exhibited the expected zinc blende structure. X-ray photoelectron spectroscopy results revealed that the Ni ions existed in a +2 state in these nanoparticles. Reflectance measurements showed a decrease in band gap with increasing Ni concentration. Room temperature photoluminescence (PL) studies indicated that all the samples exhibited broad and asymmetric PL peaks covering a wide visible range. Gaussian fitting of PL data resulted in three deconvoluted peaks corresponding to blue and green emissions. Dramatic enhancement in fluorescence efficiency was observed in the doped ZnS nanoparticles indicating their possible applications in photoluminescent devices. Magnetic studies revealed that all the doped samples exhibited carrier mediated ferromagnetism at room temperature. Saturation magnetization ( M s ) increased with increasing Ni content reaching a maximum for 3 at% Ni and decreased for samples of 5 at% Ni.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: ZnO doping and properties · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
Show source-provided references
1. Spintronics: a spin-based electronics vision for the future10.1126/science.1065389 ↗
2. Making non magnetic semiconductors ferromagnetic10.1126/science.281.5379.951 ↗
3. Doping induced magnetismin Co–ZnS nanoparticles10.1016/j.jssc.2009.07.015 ↗
4. Room-temperature ferromagnetism in EDTA capped Cr-doped ZnS nanoparticles10.1007/s00339-011-6563-1 ↗
5. Ferromagnetic nanocrystalline Gd-doped ZnO powder synthesized by coprecipitation10.1063/1.3448026 ↗
6. Optical and magnetic properties of Nd-doped ZnO nanoparticles10.1002/crat.201200026 ↗
7. Thin films: unexpected magnetism in adielectric oxide10.1038/430630a ↗
8. First principles based design and experimental evidence for a ZnO-based ferromagnet at room temperature10.1103/PhysRevLett.94.187204 ↗
9. Optical properties of manganese-doped nanocrystals of ZnS10.1103/PhysRevLett.72.416 ↗
10. ESR and photoluminescence properties of Cu doped ZnS nanoparticles10.1016/j.saa.2008.05.009 ↗
11. Synthesis and optical properties of Cr doped ZnS nanoparticles capped by 2-mercaptoethanol10.1016/j.physb.2011.02.062 ↗
12. Magnetism in Cr-doped ZnS: density-functional theory studies10.1088/0022-3727/42/23/235001 ↗
13. Synthesis and characterization of thiophenol passivated Fe-doped ZnS nanoparticles10.1016/j.mseb.2008.03.009 ↗
14. Room temperature ferromagnetism in Ni dopedZnS nanoparticles10.1016/j.jallcom.2012.12.001 ↗
15. Singh · 2005
16. Use of diffuse reflectance spectroscopy for optical characterization of un-supported nanostructures
17. Magnetic propertiesof Co-doped ZnO diluted magnetic semiconductors prepared by low-temperature mechanosynthesis10.1016/j.cplett.2006.02.109 ↗
18. Structural,optical, and magnetic properties of co-doped SnO2 powders synthesized by the coprecipitation technique10.1021/jp066897p ↗
19. Study of optical and thermal properties in nickel doped ZnS nanoparticles using surfactants10.1016/j.spmi.2012.02.008 ↗
20. Luminescence quenching in ZnS nanoparticles due to Fe and Ni doping10.1023/A:1004709601889 ↗
21. Strong green luminescenceof Ni2+-doped ZnS nanocrystals10.1007/s003390100889 ↗
22. G. Murugadoss, M. Rajesh Kumar, Synthesis and optical properties of monodispersed Ni2+-doped ZnS nanoparticles, Appl. Nanosci. (2012).10.1007/s13204-012-0167-8 ↗
23. Comparative study of Ni- and Co-substituted ZnO nanoparticles: synthesis, optical, and magnetic properties10.1021/jp201916z ↗
24. Effect of Al3+ on the photoluminescence properties of Ni2+-doped sol–gel SiO2 glass10.1016/S1387-7003(03)00019-4 ↗
25. Optical properties of transparent Li2O–Ga2O3–SiO2 glass-ceramics embedding Ni-doped nanocrystals10.1063/1.1891272 ↗
26. Enhanced near-infrared emission from Ni2+ in Cr3+/Ni2+ codoped transparent glass ceramics10.1063/1.2909543 ↗
27. A new method for the separation of paramagnetic and ferromagnetic susceptibility anisotropy using low field and high field methods10.1046/j.1365-246X.2002.01732.x ↗
28. Iron oxide nanoparticles fabricated by electric explosion of wire: focus on magnetic nanofluids10.1063/1.4730405 ↗
29. Room temperature ferromagnetism in Zn1−xCoxS thin films with wurtzite structure10.1016/j.jmmm.2011.05.057 ↗
30. MnO and NiO nanoparticles: synthesis and magnetic properties10.1039/B511920K ↗
31. Synthesis, characterization and magnetic propertiesof NiS1+x nanocrystals from [bis (salicylidene) nickel (II)] as new precursor10.1016/j.materresbull.2008.02.007 ↗
32. Electronic and magnetic properties of NiS2, NiSSe and NiSe2 by a combination of theoretical methods10.1140/epjb/e2012-30384-7 ↗
33. Donor impurity band exchange in diluteferromagnetic oxides10.1038/nmat1310 ↗
34. Synthesis, structure, and room-temperature ferromagnetism of Ni-doped ZnO nanoparticles10.1007/s10853-006-1256-4 ↗
35. Co-doped ZnO nanoparticles: mini review10.1039/c0nr00148a ↗