Biocompatible film turned into a family of electronic devices

Scientists were able to obtain biocompatible and soft composite, one which you can make different electronic items from a resistor to the transistor. The variety of properties is achieved by varying the particle size of the composite and the density of their distribution. This material is suitable for high-precision recording and processing the neurophysiological signals, which is necessary to create neural interfaces — for example, it is possible to manufacture soft implantable chip. Article published in the journal Science Advances.

Patricia Jastrzebska-perfekt (Patricia Jastrzebska-Perfect) from Columbia University and her colleagues invented a polymer composite material, which acquires different electrical properties depending on the nuances in the manufacture. The fact that the composite consists of isolating the electrons, but the ion-conductive polymer, which involved microscopic plastic conduits. The size of these microprosodic and density distribution in the film can change during production, which determines the mean free path of an electron (which most of the long conductive chain can be formed). Depending on combinations of these parameters and the distance between contacts, summed up the composite can act as an anisotropic conductor, a transistor, a transistor with individually addressable diode or resistor.

For example, across the plane of the film mikroprivodki located is thicker than along it. So if they do not form a conductive chain along, but form across — get anisotropic conductor.

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