Method and system for making microcoils and product thereof

A method for fabricating coils comprising the steps of:

• providing a plurality of liquid droplets in an emulsion of a carrier liquid, each of said plurality of liquid droplets having a diameter on length-scales ranging from hundreds of micrometers to nanometers and,
• bringing a plurality of fibers into contact with the plurality of liquid droplets,
• wherein the radius of each of the liquid droplet is larger than a critical droplet radius Rcrit=αLBC, where LBC is bending elastocapillary length which is defined as LBC=√{square root over (Er3/γ)} where E is the Young's modulus of the fiber, r is the radius of the fiber and γ is the interfacial tension between the droplet and surrounding medium, and α is a numerical factor depending on wetting parameters of the droplet, emulsion, fiber system, so that capillary forces induce spontaneous winding of the fiber around the droplet, to fabricate a coil with a diameter in a range from hundreds of micrometers to nanometers, and
• wherein the method is adapted for making a plurality of coils simultaneously.