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Ultrasound mediated synthesis of CuS nanocrystallites


We present a unique ultrasonication based method for the preparation of copper sulphide nanoparticles in ambient air using a single precursor complex, which acts as a source of both metal and sulphur. The nanoparticles of 3.31 nm have been prepared successfully by the method and characterized using powder X-ray diffractogram (PXRD), dynamic light scattering (DLS) analysis UV-Vis spectroscopy and fluorescence spectroscopy. The results proved that copper sulphide nanoparticles of hexagonal structure (covellite phase) can be prepared by sonochemical method within a very short reaction time of ~5 min. The band gap of the nanomaterial has also been calculated from absorption spectrum and was found to be 2.36 eV.

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Temperature study of magnetic resonance spectra of co-modified (Co,N)-TiO2 nanocomposites

and other oxide materials could produce RTFM. The proposed model, called the Free Carrier Mediated Exchange Model, explained the FM by the exchange interaction between carriers and the localized spins, i.e. the magnetic property was mediated by the charge carriers of the materials. As this particular model can be applied only to materials having high hole concentration, it is not suitable for low carrier concentration materials, like TiO2. The double exchange mechanism, modelled by Sato et al. [ 9 ], is more suitable in that case. According to this model the

Open access
Synthesis and 3D-AFM surface topology of nanographene-like material extracted from sulfonated tri-, di- and monochloroacetic acid

at 2θ range of 8° to 11° attributable to individual GO platelets interlinked via a non-uniform network of hydrogen bonds mediated by oxygenated functional groups and solvent molecules. To characterize nanostructural features of obtained graphene-like material AFM measurements were carried out in tapping non-contact mode as shown in Fig. 3 . Fig. 3 shows 2D- and 3D-AFM images captured for tiny scanned area (0.1 × 0.1 μ 2 ) of graphene-like material. Fig. 3c displays honeycomb ultrastructure of graphene-like material which was synthesized via CVD and reported

Open access