The golden color illustrates the deposition of biocompatible polymers on two genetically targeted neurons at right, sparing neighboring cells. The selective deposition of these polymers, which can be electrically insulating or conductive, makes it possible to modulate target cell properties in living tissues and animals. Blue diamond particles represent the monomers to make the polymer diffusing globally through the tissue. The technology only enables polymers to form in targeted cells.
Image credit: Ella Maru Studio and Yoon Seok Kim/Jia Liu, Deisseroth/Bao laboratories, Stanford University