MagnetoSperm Robots Could One Day Be Used For In Vitro Fertilization b4in.org/d4CF Doctors looking to conduct procedures on a microscopic scale have developed sperm-inspired robots that can be manipulated through the use of weak oscillating magnetic fields, according to a new report in the journal Applied Physics Letters. Measuring just over 320 microns in length, the tiny robots are comprised of a head covered in cobalt-nickel and an uncoated tail. When the robot is exposed to an oscillating field of weaker than 5 millitesla – around the strength of a refrigerator magnet – it creates a magnetic torque on its head, forcing its flagellum to oscillate and drive it forward. The scientists are then able to maneuver the robot by pointing the magnetic field at a specific location. “Nature has designed efficient tools for locomotion at micro-scales. Our microrobots are either inspired from nature or directly use living micro-organisms such as magnetotactic bacteria and sperm cells for complex micro-manipulation and targeted therapy tasks,” said study author Sarthak Misra, an associate professor of robotics at the University of Twente in The Netherlands. The microrobot was developed by spin-coating a five-micron polymer layer onto a silicon support wafer. The cobalt-nickel layer was then applied to the head using electron beam evaporation. “As technology progresses and many products get smaller, it becomes difficult to assemble objects on nano- and micro-scales,” added Islam Khalil, an assistant professor of robotics at the German University in Cairo. “MagnetoSperm can be used to manipulate and assemble objects at these scales using an external source of magnetic field to control its motion.” Khalil said the MagnetoSperm robots could be used for in vitro fertilization, drug delivery, cell sorting and the clearing of blocked blood vessels. The study team said they are currently looking into scaling down the robots into even smaller sizes. In December, a team of German scientists revealed a sperm-based microrobot that could function similarly to the MagnetoSperm. According to a report from New Scientist, the system involves placing a bull sperm inside a nanotube. The scientists are then able to remotely control the movements of the sperm using magnetic fields. The speed of the sperm can be controlled be changing the temperature of its environment, the report said. More b4in.org/d4CF
Posted on: Sun, 08 Jun 2014 22:09:44 +0000
Trending Topics
Recently Viewed Topics
© 2015