The superconducting transition temperature, T(c), of several series of cuprates shows a nonlinear dependence on the hole concentration, n(h), determined by chemical titrations. The t(c) becomes maximum when n(h) is in the ...

Monodispersed nanospheres of carbon are obtained by the pyrolysis of methane or benzene at high temperatures in the presence of hydrogen without the use of any catalyst. Carbonization of these hydrocarbons over transition ...

The ultraviolet photoelectron spectrum of the H2S dimer shows four features with vertical ionization energies of 9.75, 10.95, 12.37 and 13.69 eV; the adiabatic ionization energies of the first two ionic states are 9.56 and ...

A detailed study of the layered manganite La1+xSr2-xMn2O7 has been performed, establishing that within the composition range 0.1 ≤ x ≤ 0.45 the phases crystallize in the I4/mmm space group. The evolution of structural ...

A simple procedure has been developed to prepare thiol-derivatized nanoparticles of metals, The procedure involves the transfer of well-characterized metal hydrosols to a hydrocarbon medium containing the thiol. Thiol-derivatized ...

Effects of cation substitution in the manganese site of charge-ordered (CO) rare earth manganates have been studied to find out how the properties vary with the average radius of theAsite cations, 〈rA〉, and the substituent ...

Mesoporous silicophosphates containing up to 22% phosphorus were prepared using cationic surfactants. A mesoporous silicophosphate of the approximate composition Si19P4O48 had a surface area of 770 m(2)g(-1), after removal ...

Salient structural features of the important families of cuprate superconductors are briefly reviewed. Correlations between the superconducting transition temperature and some of the crucial structure parameters are ...