0000000000617589

AUTHOR

Roberto Felix Duarte

showing 3 related works from this author

Magnetic and optical properties in degenerated transition metal and Ga co-substituted ZnO nanocrystals

2019

Abstract In order to study the influence of itinerant electrons on magnetic properties of transition metal substituted ZnO nanocrystals, nanopowders containing different amounts of Ga and fixed amounts of Fe, Ni and Mn ions were synthesized. The ions of different transition metals and Ga were successfully introduced into the ZnO structure using solvothermal synthesis method. X-ray diffraction, scanning electron microscopy, hard X-ray photoelectron spectroscopy and Rietveld refinement were used to characterize the synthesized nanocrystals. Optical measurements revealed that Ga substitution can change the light transmittance/absorption in the infrared part of the electromagnetic light spectru…

Materials scienceScanning electron microscopeRietveld refinementInfraredMechanical EngineeringSolvothermal synthesisMetals and Alloys02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical sciencesTransition metalX-ray photoelectron spectroscopyNanocrystalMechanics of MaterialsMaterials ChemistryPhysical chemistry0210 nano-technologyAbsorption (electromagnetic radiation)Journal of Alloys and Compounds
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Facile synthesis of magnetically separable CoFe2O4/Ag2O/Ag2CO3 nanoheterostructures with high photocatalytic performance under visible light and enha…

2017

Riga Technical University supported the preparation of this manuscript from the Scientific Research Project Competition for Young Researchers No. ZP-2016/7. The authors wish to kindly acknowledge the financial support of HZB, Estonian Research Council (PUT1096, PUT735 and IUT2-25) and Estonian Centre of Excellence in Research Project “Advanced materials and high-technology devices for sustain-able energetics, sensorics and nanoelectronics” TK141 (2014–2020.4.01.15-0011).

Materials scienceMagneticNanoparticle02 engineering and technologyPhotocatalyticNanoheterostructures010402 general chemistryPhotochemistry01 natural sciencesSilver carbonatechemistry.chemical_compoundX-ray photoelectron spectroscopyPhase (matter):NATURAL SCIENCES:Physics [Research Subject Categories]Chemical Engineering (miscellaneous)PhotodegradationWaste Management and DisposalSilver carbonateta114Process Chemistry and Technology021001 nanoscience & nanotechnologyPollution0104 chemical scienceschemistryPhotocatalysis0210 nano-technologySilver oxideSilver oxideVisible spectrumJournal of Environmental Chemical Engineering
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Solvothermal synthesis derived Co-Ga codoped ZnO diluted magnetic degenerated semiconductor nanocrystals

2018

Authors kindly acknowledge to the Estonian Research Council ( PUT1096 , IUT2-25 , PUT735 ), the Estonian Centre of Excellence in Research project “Advanced materials and high-technology devices for sustainable energetics, sensorics and nanoelectronics (TK141), and the financial support of HZB. We are grateful to the staff of BESSY II for the assistance and co-operation during the synchrotron-based measurements.

Materials scienceMagnetismSolvothermal synthesisAnalytical chemistryNanoparticle02 engineering and technology010402 general chemistry01 natural sciencesSolvothermal synthesisMetalMagnetization:NATURAL SCIENCES:Physics [Research Subject Categories]DopingMaterials Chemistryta216Plasmonta114Mechanical EngineeringDopingMetals and Alloys021001 nanoscience & nanotechnology0104 chemical sciencesPlasmonic nanocrystalsNanocrystalMechanics of Materialsvisual_artZnOvisual_art.visual_art_mediumDiluted magnetic semiconductors0210 nano-technologyDegenerated semiconductorsJournal of Alloys and Compounds
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