made of polymer or another ceramic material in its interior fig1 a the concentric needles are exposed to an electrical field facing a polarity electrode opposite that of the needles at the end of needle 1 with q 1 flow the liquid meniscus of the lignin solution is coated with the ethanol injected by needle 2 with q 2 flow at this point the electrical voltage established between needle 2 and the collector electrode increases through a high voltage source until both menisci start to deform into the almost conical shape when the voltage is high enough a thin jet emanates from the tip of the cone formed by the lignin flow which will be collected in the opposite electrode in the shape of a micro nanofibre fig1 b it illustrates a device made up of three concentric needles for the preparation of hollow or coaxial lignin nanofibres at the end of needle 2 with q 2 flow the liquid meniscus of the lignin solution is coated with the ethanol injected by needle 3 with q 3 flow q 1 flow of liquid which is lignin immiscible or only slightly miscible with lignin is injected through needle 1 at this point the electrical voltage established between needle 3 and the collector electrode increases through a high voltage source until the three menisci start to deform into an.