How scientists can better see brain chemicals in a dish

These tiny sensors, coated with a special material called Nafion, can better detect brain chemicals like dopamine and serotonin in lab tests by keeping out confusing substances that might mess up the results.

Scientists can use laser light to spot brain chemicals in lab samples, and this method might be a good alternative to older electrical-based techniques.

New biosensors can now detect tiny amounts of brain chemicals like dopamine and serotonin in lab tests, even when other similar substances are around.