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An Fe3O4-graphene oxide nanocomposite has been synthesized via a chemical reaction with a magnetite particle size of 18-25 nm. The resulting nanocomposite can be easily manipulated by an external magnetic field, exhibits excellent catalytic activity and may be reused for several cycles with marginal loss of activity. This recyclable nanocomposite provides an efficient, economic, novel route for multi-component A(3) coupling reactions of aldehydes, amines and alkynes and gives the propargylamine in excellent yields.

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By the analytical gravimetric technique, the equilibrium saturated solubilities of l-serine and l-isoleucine in aqueous solutions of sodium nitrate (NaNO3) and potassium nitrate (KNO3) were measured at six different temperatures in the range of 288.15 to 313.15 K. The theoretical studies on the standard transfer Gibbs free energies were performed with the help of experimental solubility data. The molar volume, transfer enthalpy of cavity, transfer Gibbs free energy, and dipole–dipole interactions were also measured to explore complete thermodynamical aspects of these molecules in aqueous electrolytes. In addition, the solute–solute, solute–solvent, and solvent–solvent interactions in terms of transfer Gibbs energies due to chemical interactions and transfer entropy for the present amino acids (AA’S) were calculated by deducting the cavity interaction and dipole–dipole interaction from the total transfer Gibbs free energy (ΔG t 0(i)) and transfer entropies (TΔS t 0(i)). Finally, the stability owing to the chemical nature of the amino acids in aqueous electrolytic solutions is explained by introducing the abovementioned thermodynamical parameters.

Graphene‐like carbon nano‐sheets are prepared from dextrin, with cetyltrimethyl ammonium bromide (CTAB) as stabiliser, by the action of concentrated sulfuric acid. Oxidation of such sheets produce graphene oxide (GO) like material. These are characterized in the usual manner and their photophysical properties are explored. Binding of certain drug molecules with carbon nano‐sheet is investigated fluorimetrically. Finally, action of carbon nano‐sheets on normal and cancer cell lines revealed that the sheets have no effect on normal cells, but induce apoptosis on cancer cells. Also, these carbon nano‐sheets behave very similar to reduced graphene oxide platelets.

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The plasma-enhanced chemical vapor deposition (PECVD) technique has been utilized for the facile surface deposition of hydrogenated diamond-like carbon (HDLC) thin-films onto Si(100) substrates.

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