wiss scientists have created nanotech-based electronic chips that are so flexible they can be wrapped around a hair strand. Based at ETH Zürich, the researchers were able to accomplish this feat by creating thin layers of stacked polyvinyl that are topped with an electronic circuit. When submerged in water, two of the polyvinyl layers dissolve, leaving a tiny circuit embedded in a sheet of parylene that is one micrometer thick. The researchers found that the transistors still function when wrapped around a human hair. The flexible electronics can adhere to a range of materials. Potentially suited for wearables and a whole range of medical applications, the chip has already been used in an artificial eye and in a glaucoma monitor.