Smart Polymers Research Corp. (SPRC) is a spin-off of Fractal Systems, focusing on development of rapid portable biosensors. The company uses âsmartâ or stimuli-responsive natural and synthetic polymers for the detection of biological substances. A variety of novel biological sensing methods has been designed and tested such as electrochemical molecular imprinting, substrate-responsive fluorescent quenching using molecular wires, aptamer-based colorimetric lateral flow assay and aptamer/quantum dot fluorescence flow detection of toxins and other biothreat agents, aiming for cost-efficiency, higher detection speed and sensitivi