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

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