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Self-assembly follows the general Earnshaw theorem of electrostatics according to which it is impossible to prepare stable fluid structures such as stable fluid jets in which all elements interact only by Coulomb forces (6), (9), (10), (13).
In fact, so far we have no convincing concept for the formation of such structures other than a general argument based on the Earnshaw theorem of electrostatics which, in principle, even allows the formation of odd shapes during electrospining.
In the spirit of the theoretical studies by Yarin and Reneker and of the Earnshaw theorem, we believe that by choosing the right spinning conditions it will be possible to produce barbed nanowires also from other polymer systems.