Studies on fabricating alpha-Fe2O3 ultrafine particles by LB film technology

The alpha-Fe2O3 ultrafine particles were dispersed in the solutions of stea ric acid/n-hexane/chloroform by the ultrasonic method, and fabricated by th e Langmuir-Blodgett film technology. alpha-Fe2O3 ultrafine particles/steari c acid composite LB films were characterized by pi-A curve, UV-visible abso rption spectrum. IR spectrum, small angle X-ray diffraction, TEM and electr on diffraction. The results showed the following: the alpha-Fe2O3 ultrafine particles were uniformly dispersed in organic solvents; the film-forming c haracterization of the alpha-Fe2O3 ultrafine particles/stearic acid monolay er was fine, the alpha-Fe2O3 ultrafine particles in the composite film had a small orientation: the alpha-Fe2O3 ultrafine particles/stearic acid compo site film had a lamellar structure. (C) 1998 Elsevier Science Limited. All rights reserved.