美国佐治亚大学的研究人员开发出一种新材料,暴露在阳光下一分钟后可在两周内发出近红外光。研究人员最先研究的材料为三价铬离子,这是一种著名的近红外光发射源。当暴露在光线下,其电子从基态快速转移到一个更高的能量状态。随着电子返回基态,以近红外光释放能量。但三价铬离子发光的时间一般较短,通常为几毫秒。在最新的研究中, Researchers at the University of Georgia in the United States have developed a new material that emits near-infrared light within two weeks after being exposed to the sun for a minute. The first material researched by the researchers was trivalent chromium ions, a well-known source of near-infrared light. When exposed to light, its electrons quickly move from the ground state to a higher energy state. As the electron returns to the ground state, energy is released in near-infrared light. However, trivalent chromium ions generally emit light for shorter periods, usually a few milliseconds. In the latest research,