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Chinese scientists catch enigmatic electrons in the act for the first time

  • New findings challenge ideas about how electrons move and transfer energy
  • Watching electrons move under sunlight could boost efficiency of solar power

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Findings by a team of Chinese researchers are challenging assumptions about how electrons move, sparking ideas on how to develop better materials to harvest solar energy. Photo: DICP
Zhang Tongin Beijing

The question of what an electron is and how it moves has baffled scientists for decades. The tiny, structureless particles form much of the foundations of science, but their behaviour has largely been unseen, rarely glimpsed by the prying eyes of scientists.

Now, researchers in northeastern China say they have been able to peek into this secret subatomic world for the first time.

The team said they observed how electrons moved under the influence of sunlight, a discovery that could lead to more efficient solar energy collection.
An accepted theory suggests that when light particles stimulate electrons in light-sensitive materials, like those used in solar panels, the electrons will move in wavelike patterns, generating an electric current that can be used for chemical reactions or electricity production.

But the Chinese researchers saw something different – instead of a wave motion, they found that the electrons moved like a cannonball being shot out of a cannon. According to the researchers, this ballistic course can be tracked and predicted, which could pave the way for the development of more efficient materials to harvest the sun’s energy.

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The peer-reviewed findings were published in the journal Nature on Wednesday. Li Can, a professor with the State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, under the Chinese Academy of Sciences, led the research.

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