Hologram

Scientists at Cambridge University have invented a new kind of diagnostic device.  They embedded silver nanoparticles in hydrogel.  When a chemical is exposed to the hydrogel, which in turn is excited by a laser’s energy, the hydrogel either expands or contracts and changes the laser’s spectrum in a holograph.  As color profiles for different diseases or toxins, etc, are determined, diagnosis becomes a matter of matching colors. MORE

Image Credit:  Cambridge University