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This laser-powered robot is surprisingly small. What can it be used for?

Semiconductors are not the only silicon technologies that compete with Moore's Law. Now we see a new challenge.

Researchers at Cornell University have revealed a mini robot that is clever enough to penetrate almost anywhere in the human body and cheap enough to occur on a large scale.

The project is the creation of Cornell physics professor Itai Cohen, Paul McEuen, professor of physical sciences, and Marc Miskin, assistant professor at the University of Pennsylvania. This is not Cohen's first microscopic robot.

This work builds on his previous efforts on origami-inspired micro-machines and manages to overcome a significant hurdle: the lack of a drive element. at the micro scale that integrates perfectly with semiconductor processing and responds to standard electronic control signals, according to the team's study published in Nature.

The robots are only 5 microns thick (one micron is equal to one thousandth of a millimeter), 40 microns wide and between 40 and 70 microns high, and Depending on the design. The “brain” and the body consist of a silicon photovoltaic circuit, while the legs are made of a quartet of electrochemical actuators.

“In the context of the robot's brains, there is a sense that we are only taking existing semiconductor technology and making it small and downloadable,” McEuen told Cornell News. â € œBut the legs didnâ € TMt exist before. There were no small actuators that could be used electrically. And we had to invent them and then combine them with electronics, 'he explained.

Thus, the legs are layered with thick strips of platinum atom with a titanium “cap” covering one end. When platinum is exposed to an electric charge, negatively charged ions from the surrounding chemical solution are absorbed on the platinum surface to neutralize the charge.

This absorption causes the platinum foot to bend, although it is thin enough not to break under the pressure of repeated bending. To encourage the robot to move effectively, the team harnesses the photovoltaic force in its body with laser pulses. Each set of pulses targets a separate circuit which in turn controls a separate set of legs.

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The doctor who lost his license after publishing this message on the internet

The doctor who posted on Twitter that he would treat the Jews “especially” by offering them the wrong medicines, and lost his medical certificate. The decision is permanent and certainly life-saving.

The Ohio State Medical Council has revoked the medical training certificate of a doctor who had already been fired from two residency programs after old anti-Semitic tweets appeared on social media, including one in which he threatened. that he will give the Jews the wrong medicine on purpose.

Lara Kollab has been banned from practicing osteopathic medicine or surgery in Ohio. She handed him the certificate before revoking it. Following the decision of the Medical Council, Kollab can no longer participate in another medical training program in the state, according to the Times of Israel.

Kollab wrote a series of anti-Semitic posts on social media between 2011 and 2013, but deleted them after being accepted to the New York College of Osteopathic Medicine, which is known as â The largest private university in the United States with Jewish roots.

Kollab apologized after his tweets caught the public's attention, saying he wrote them because he had difficulty expressing his intense feelings about what he did. seen in her ancestral land, following visits to Israel and the West Bank.

She was fired in 2018 from a resident at a clinic in Cleveland after three months there. She was expelled from a second residency program at Kern Medical Center in Bakersfield, California, a few months later.

Among the posts discovered, Kollab repeatedly called on his followers to “destroy the homes of the Jews” and called on Arab nationals to unite to “destroy the Nazi and terrorist state of Israel.”

Kollab wrote a message to the Ohio State Medical Council stating that “the things I have written do not represent who I am.”