Diplom Journalism & Public Opinion, Universidad del Rosario, Bogotá, Colombia
Studies, In Liberal Arts & Social Sciences, Universidad del Rosario, Bogotá, Colombia
Web Page Design and Content Management for the Micro, Nano and Molecular Systems Group; as well as writing short journalistic articles, about this findings, research, results and publications. On the other hand, we are currently aiming to develop video journals regarding the different publications and findings of this group. Hopefully, these video journals will turn out to be a useful way to spread this groups efforts beyond the academic world.
ACS Nano, 8(9):8794-8801, June 2014, Featured cover article. (article)
Tissue and biological fluids are complex viscoelastic media with a nanoporous macromolecular structure. Here, we demonstrate that helical nanopropellers can be controllably steered through such a biological gel. The screw-propellers have a filament diameter of about 70 nm and are smaller than previously reported nanopropellers as well as any swimming microorganism. We show that the nanoscrews will move through high-viscosity solutions with comparable velocities to that of larger micropropellers, even though they are so small that Brownian forces suppress their actuation in pure water. When actuated in viscoelastic hyaluronan gels, the nanopropellers appear to have a significant advantage, as they are of the same size range as the gel’s mesh size. Whereas larger helices will show very low or negligible propulsion in hyaluronan solutions, the nanoscrews actually display significantly enhanced propulsion velocities that exceed the highest measured speeds in Newtonian fluids. The nanopropellers are not only promising for applications in the extracellular environment but small enough to be taken up by cells.
Our goal is to understand the principles of Perception, Action and Learning in autonomous systems that successfully interact with complex environments and to use this understanding to design future systems