A5013152254- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Nanocluster Synthesis and Applications
- Copper-based nanomaterials and applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Crystallography and molecular interactions
- Organometallic Compounds Synthesis and Characterization
- Nanomaterials for catalytic reactions
- Advanced Photocatalysis Techniques
- Crystal structures of chemical compounds
- Metal complexes synthesis and properties
- Metal and Thin Film Mechanics
- Metal Extraction and Bioleaching
- Perovskite Materials and Applications
- Advanced battery technologies research
- Chemical Synthesis and Reactions
- Electronic and Structural Properties of Oxides
- Electrocatalysts for Energy Conversion
- ZnO doping and properties
- Semiconductor materials and interfaces
- Supercapacitor Materials and Fabrication
- Chemical Thermodynamics and Molecular Structure
- Catalysis and Hydrodesulfurization Studies
Université de Yaoundé I
2015-2024
Kiel University
2022
University of Zululand
2011-2014
We report the synthesis of hexadecylamine (HDA) and tri-n-octylphosphine oxide (TOPO) capped CdS nanoparticles using cadmium piperidine dithiocarbamate (DTC) tetrahydroquinoline complexes as single source precursors. These are easy to prepare, air stable for long periods pyrolyze give high quality nanoparticles. The obtained showed quantum confinement with near band edge luminescence. reaction conditions such amount capping group temperature were varied study their influence on properties...
We report the synthesis of lead piperidine and tetrahydroquinoline dithiocarbamate (DTC) complexes their use as single source precursors for preparation anisotropic PbS nanoparticles. The were thermolysed in coordinating solvents such hexadecylamime (HDA), tri-n-octylphosphine oxide (TOPO), oleylamine (OA) decylamine (DA) at various reaction temperatures. variation conditions produced particles with shapes ranging from spheres to cubes rods. size is generally larger than those synthesized by...
Abstract New complexes catena ‐(μ 2 ‐nitrato‐ O , O′ )bis(piperidinedithiocarbamato)bismuth(III) ( 1 ) and tetrakis(μ‐nitrato)tetrakis[bis(tetrahydroquinolinedithiocarbamato)bismuth(III)] were synthesised characterised by elemental analysis, FTIR spectroscopy thermogravimetric analysis. The single‐crystal X‐ray structures of determined. coordination numbers the Bi III ion are 8 for ≥6 when experimental electron density nominal 6s lone pair electrons is included. Both used as single‐source...
The synthesis of the complete range (Bi1-x Sb x )2S3 solid solutions, where 0 ≤ 1, by variation mole ratio bismuth and antimony piperidine dithiocarbamate complexes is reported. There was a near linear expansion c lattice parameters as precursor increased. composition particles directionally followed amount used. When compared to cell parameters, slight deviation from Vegard's law observed with corresponding contraction b parameter an approximately 3.5% reduction volume. nanorods obtained...
In search of a suitable single-source precursor for the deposition nanostructured PbS thin films at moderate temperatures under ambient conditions, we have synthesized ligand N-(thiomorpholine-4-carbothioyl)benzamide and its corresponding lead(II) complex. The structures both compounds were determined by single-crystal X-ray diffraction. complex, two ligands coordinate to atom in hemi-directed geometry through S O atoms. Secondary intermolecular Pb⋅⋅⋅S interactions group complexes into...
We report the synthesis of lead(II) complexes 2-(thiophen-2-ylmethylene) hydrazine-1-carbothioamide (1) and 2-(1-(thiophen-2-yl) ethylene) (2), which were used as single source precursors in hexadecylamine (HDA) oleylamine (OLA) at 190, 230, 270°C to synthesize sulfide nanoparticles. Optical studies by UV–vis analysis showed a general blue shift absorption band edge PbS nanoparticles (NPs) with energy bandgaps determined Tauc’s plots ranging from 2.15 3.11 eV. The development NPs variety...
In this study, two copper(II) complexes, [Cu(C6H8N3S2)2]Cl2 (1) and [Cu(C7H10N3S2)2]Cl2·H2O (2), were synthesized from 2-(thiophen-2-ylmethylene)hydrazine-1-carbothioamide (L1H) 2-(1-(thiophen-2-yl)ethylidene)hydrazine-1-carbothioamide (L2H) respectively characterized using various spectroscopic techniques elemental analyses. The as-prepared complexes used as single-source precursors for the synthesis of oleylamine-capped (OLA@CuxSy), hexadecylamine-capped (HDA@CuxSy), dodecylamine-capped...
The high stability, availability, and wide size-dependent bandgap energy of sulphidic semiconductor nanoparticles (NPs) render them promising for applications in optoelectronic devices solar cells. However, the tunability their optical properties depends on strict control crystal structure crystallisation process. Herein, we studied structural evolution during formation CdS ZnS solution by combining situ luminescence spectroscopy, synchrotron-based X-ray diffraction (XRD) pair distribution...
This article reports on VIS-active composite thin films based zinc oxide (ZnO) and copper sulfide (CuxS) deposited using robotic spray pyrolysis deposition (SPD) for the study of optical photocatalytic properties. The first step involves SPD a CuxS layer onto glass substrate at 300°C. second consists ZnO to form glass/CuxS-ZnO composites that were further annealed 400°C. development was confirmed by XRD EDX analyses. band gap energy ( <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1">...
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The title compound, [N-(2-pyridylmethyl)-(L)-alanine]Co(III) thiocyanate (1) was obtained from the reaction of Co(OOCH3)2·H2O with tridentate reduced Schiff base ligand, N-(2-pyridylmethyl)-(L)-alanine (L) and NH4SCN characterized by elemental analysis, IR, UV-visible, TGA single- crystal X-ray diffraction. Structural spectroscopic analyses reveal [Co(L)2)]SCN to be monomeric Cobalt(III) adopting a pseudo-octahedral geometry, coordinating two reduce ligands. In lattice, anion forms an...
Cadmium dithiocarbamate and cadmium ethyl xanthate complexes were synthesized characterized by microanalysis, Fourier transform infrared (FT-IR) spectroscopy thermogravimetric analyses. The employed as molecular precursors for the fabrication of CdS nanoparticles in hexadecylamine (HDA) oleylamine (OLA) at a temperature 250 °C. Spherical oval shaped particles with sizes ranging from 9.93 ± 1.89 to 16.74 2.78 nm obtained OLA while spherical, rod 9.40 1.65 29.90 5.32 HDA. Optical properties...