Ultrasensitive Test for Heart Attacks, Alzheimer's

By Kevin Bullis

Description text

To detect DNA, researchers coat nanoparticles with strands of DNA that are complementary to the target DNA sequence (red wavy line). Once these nanoparticles bind to the target, they are captured on a microarray and coated with silver (ring around gold particle in bottom left image) to make them easier to see using a digital light sensor.