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Cornell researchers installed electronic "brains" on solar-powered robots that are 100 to 250 microns in size (smaller than an ant's head) so they can walk
autonomously without outside control.
The "brain" of the new robot is a complementary metal-oxide semiconductor (CMOS) clock circuit that contains 1,000 transistors, as well as a set of diodes, resistors and capacitors
.
Although Cornell researchers have previously developed miniature machines capable of crawling, swimming, walking, and folding themselves, there are always "strings attached": in order to generate motion, electricity needs to be supplied with wires or laser beams focused directly onto a specific location
of the robot.
This innovation lays the foundation for a new generation of microscopy devices that can track bacteria, sniff out chemicals, destroy contaminants, perform microsurgery, and remove plaque
from arteries.
The manufacturing process designed by author Reynolds could allow other researchers to equip microrobots with their own applications — from chemical detectors to photovoltaic "eyes" — to help robots navigate
by sensing changes in light.
of microrobots with on-board digital control.
