PREPARATION OF NANOPARTICULATE FE2O3-POLYMALEIC MONOESTER ALTERNATINGLANGMUIR-BLODGETT-FILMS WITH FUNCTIONAL ORGANIC HYDROPHOBIC PART

An organic functional group was introduced into the inorganic nanopart icle-organic alternating LB films by the use of the polymaleic monoest er with a functional lateral chain [GRAPHICS] to replace a fatty acid. Using the polymer (PMANN), the distance between adjacent nanoparticle s in the LB films is apparently decreased and the distribution of the nanoparticles in the monolayer is more homogeneous than that in the na noparticulate Fe2O3-stearate monolayer. All these phenomena are ascrib ed to the carboxylate groups of a polymer molecule bound to two or mor e nanoparticles. The photovoltage response of n-type (p-type) silicon coated with a monolayer of nanoparticulate Fe2O3-PMANN LB films increa ses (decreases) for two orders.