Zhang Chaoyang, a doctoral candidate of the University of Electronic Science and Technology of China (UESTC), uses an infrared thermal imager to test the effect of plasma jet on human skin in the UESTC in Chengdu, southwest China's Sichuan Province, Sept. 11, 2019. Recently, researchers of the department of physics and electronics, school of electronic science and engineering in the UESTC have successfully developed a new handheld plasma jet after two years of scientific experiments. Plasma are excited by microwave energy. By designing a special structure for the interior of the plasma jet and the nozzle, the low-temperature plasma jet can exist stably in the atmosphere without quartz tube and other constrained pipes. The length of the jet is over 2 centimeters, which can greatly expand the application field of the low-temperature atmospheric plasma jet. (Xinhua/Liu Kun)
