Detection of AlO and TiO by laser-induced fluorescence in powder synthesisflames

Laser-induced fluorescence (LIF) has been used to detect AlO and TiO in low pressure hydrogen/oxygen flames with added metalorganic precursors. Such f lames are used for synthesis of alumina and titania nanopowders. Knowledge of the monoxide profiles in these flames is useful in developing chemical m odels for the complex pyrolysis of metalorganics in flames. Challenges to d etection of AlO and TiO include strong scattering background from the parti cle-laden flame, as well as interferences from broadband fluorescence. We p resent strategies that allow for sensitive detection of these species in th e presence of such interferences, with minimum temperature correction requi red.