Description_x000D_ Application_x000D_ Amine-modified polystyrene latex beads (fluorescent orange) have been used to develop an electrochemical nitrite nanosensor as well as to validate a pharyngeal aspiration technique for exposing the mouse lung to respirable particles._x000D_ They have also been used:_x000D_ • to test nanofiber filtration efficiency_x000D_ • in the preparation of bilayer tissue-simulating phantoms, which are artificial materials used in biomedical optical instrumentation_x000D_ • to copolymerize collagen coated stiff polyacrylamide gels to seed cancer cells for traction force microscopy_x000D_ Packaging_x000D_ 1 mL in poly bottle