| abstract |
A method and device for preparing desired sequences on a substrate at known locations. Known locations (10) of a substrate (2) are irradiated by way of a mask (8) so as to activate a material (4) for binding. The substrate is then exposed to a first material (12) for binding thereto. Second locations (14) are then irradiated through a mask and exposed to a second material (16). A variety of sequences may be formed through selective irradiation of the substrate followed by application of selected materials. A reactor system and fluorescence detection system are also dis-closed. |