Low Temperature Ferromagnetic Behavior of Graphene Oxide (GO) and Molybdenum Disulphide (MoS₂) Hybrid Nanocomposite.

GO:MoS₂ nanoparticle (NP) hybrid nanocomposite is prepared and studied structural, electronic and magnetic properties using X-ray diffraction, field emission scanning electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy and superconducting quantum-interface-device measurements. MoS₂-NP exhibited diamagnetic characteristic but GO:MoS₂-NP hybrid nanocomposite exhibited low temperature ferromagnetic characteristics. Field cooling and Zero field cooling characteristic exhibited divergence below ~280 K with increasing magnetic field.

Electronic, Electrical, and Magnetic Behavioral Change of SiO-NP-Decorated MWCNTs.

Silicon-oxide-nanoparticle (SiO-NP) heteroatoms were decorated/deposited onto multiwall carbon nanotube (MWCNT) surface to tune the properties of MWCNTs for electronic and magnetic applications. To achieve this objective, SiO-NPs and MWCNTs were prepared and suspended together into toluene and heated at <100 °C for the formation of MWCNTs/SiO-NP nanocomposites. A change in the microstructure, electronic, electrical, and magnetic behaviors of MWCNT nanocomposites decorated/deposited with silicon content was investigated using different techniques, viz.

Electronic structure and magnetic behaviors of exfoliated MoS nanosheets.

The correlation of electronic structure and magnetic behaviors of layered molybdenum disulfide (MoS) nanosheets, mechanically exfoliated from pristine hexagonal crystal (2H-MoS) have been studied. Raman spectra show the energy difference (ΔE) between two Raman peaks A and [Formula: see text] was about 20.2 cm, indicating the formation of mono-/bi-layered MoS nanosheets as obtained after mechanical exfoliation from pristine 2H-MoS .

Conduction Mechanisms in Polyvinyl Alcohol: CdS/CdS:Cu Nanoparticle Hybrid Nanocomposites.

The electrical conduction mechanisms were investigated for the CdS and Cu-doped CdS (CdS:Cu) nanoparticles embedded in polyvinyl alcohol (PVA) (PVA/CdS and PVA/CdS:Cu) nanocomposites; synthesized by the chemical Sol Gel method on indium tin-oxide (ITO) substrate. X-ray diffraction pattern results show that the PVA/CdS nanocomposite is hawleyite-sturcture and PVA/CdS:Cu nanocomposites show greenockite-hawelyite mixed structure. The sizes of CdS and CdS:Cu nanoparticles were estimated from transmission electron microscopy (TEM) images and are ≈4 nm and ≈10 nm respectively; which were formed inside the PVA polymer layer.