Nanoelectronics and brain science. The development of nanoelectronics-enabled cellular tools underpins Lieber's views on transforming electrical recording and modulation of neuronal activity in brain science. Examples of this work include the integration of arrays of nanowire transistors with neurons at the scale that the brain is wired biologically, mapping functional activity in acute brain slices with high spatiotemporal resolution and a 3D structure capable of interfacing with complex neural networks. He developed macroporous 3D sensor arrays and synthetic tissue scaffold to mimic the structure of natural tissue, and for the first time generated synthetic tissues that can be innervated in 3D, showing that it is possible to produce interpenetrating 3D electronic-neural networks following cell culture. Lieber's current work focuses on integrating electronics in a minimally/non-invasive manner within the central nervous system. Most recently, he has demonstrated that this macroporous electronics can be injected by syringe to position devices in a chosen region of the brain. Chronic histology and multiplexed recording studies demonstrate minimal immune response and noninvasive integration of the injectable electronics with neuronal circuitry. Reduced scarring may explain the mesh electronics’ demonstrated recording stability on time scales of up to a year. This concept of electronics integration with the brain as a nanotechnological tool potentially capable of treating neurological and neurodegenerative diseases, stroke and traumatic injury has drawn attention from a number of media sources. "Scientific American" named injectable electronics one of 2015's top ten world changing ideas. "Chemical & Engineering News" called it “the most notable chemistry research advance of 2015.”