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Pure Appl. Chem., 2002, Vol. 74, No. 9, pp. 1643-1649

Solvothermal routes to capped oxide and chalcogenide nanoparticles

Ujjal K. Gautam1, Moumita Ghosh1, Michael Rajamathi2 and Ram Seshadri1*

1 Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India
2 Department of Chemistry, St. Joseph's College, Bangalore 560 027, India

Abstract: We review our recent contributions to the use of solvothermal methods for the preparation of different oxide and chalcogenide nanoparticles. We have prepared sub 10-nm g-Fe2O3, ZnFe2O4, and CoFe2O4 particles by the decomposition of the corresponding cupferron complexes in the presence of n-octylamine or n-dodecylamine in solvothermal toluene. Similarly, dodecanethiol-capped chalcogenide nanoparticles of CdSe have been prepared by reacting cadmium stearates with H2Se under solvothermal conditions. The H2Se is generated in situ by the reduction of Se by tetralin. Using this latter technique, we have also been able to prepare PbSe and PbI2 in toluene under solvothermal conditions, albeit in bulk (rather than nanocrystalline) form. In the preparation of PbI2, HI is prepared by the in situ reduction of I2 by tetralin.