Video: Rice University researchers attempt to insert a carbon nanotube fiber into agarose, a model for brain tissue, without support; it buckles without penetrating the surface. With their custom microfluidic device, they successfully insert a 30-micron carbon nanotube fiber into agarose. The fiber passes through a small gap between the device and the agarose, penetrates the surface and continues to extend into the target. (Credit: Rice University)