On September 27th, Professor Wang Zhiming from the Institute for Basic and Frontier Research at the University of Electronic Science and Technology of China (UESTC) made a groundbreaking contribution to science by publishing a research paper titled *"Laser Streaming: Turning a Laser Beam into a Flow of Liquid"* in *Science Advances*, a prestigious journal under the *Science* publishing family. The study was co-authored by Dr. Wang Yanan, a postdoctoral researcher at the same institute, with Professor Wang Zhiming and Professor Bao Jiming serving as corresponding authors. This marks the first time that UESTC has been listed as the primary affiliation on the cover of *Science Advances*, a significant milestone for the university.
The research was initially shared as a preprint on arXiv.org and quickly gained global attention, being featured by major tech media outlets such as MIT Technology Review, AZoNano, and Laser Focus World within just one and a half months. The paper introduces a novel concept called "photohydrodynamics," which offers a new approach to using lasers to drive macroscopic fluid motion.
Led by Professor Wang’s team in collaboration with researchers from the University of Houston, Harvard University, and Purdue University, the study demonstrates how pulsed laser light can generate continuous high-speed water flow in pure water. The mechanism combines two key physical phenomena: the photoacoustic effect, where laser energy is converted into sound waves, and the acoustic wave-driven fluid motion, where these sound waves push the liquid forward.
In the experiment, a nanosecond laser was used to illuminate a glass cuvette filled with a gold nanoparticle dispersion. After exposure, a microcavity formed inside the cuvette, with gold nanoparticles adhered to its walls. Under pulsed laser illumination, the nanoparticles underwent rapid expansion and contraction, generating ultrasonic waves. These waves then drove the surrounding liquid into motion through an acoustic wave-driving effect. The microcavity played a crucial role in linking the two processes. Once formed, it allowed the system to work with various liquids, including pure water and other solutions.
This innovative work highlights the potential of integrating nanophotonics, acoustics, microfluidics, and materials science for developing optically controlled or triggered microstructured devices. It opens up exciting possibilities for future applications in lab-on-a-chip systems, optical actuation, and more.
Dr. Wang Yanan, a postdoctoral fellow in Professor Wang Zhiming’s group at UESTC and also affiliated with Professor Bao Jiming’s team at the University of Houston, specializes in nanophotonics and low-dimensional materials. Since joining the institute, he has contributed significantly to research, including publishing a paper on distinguishing thermal lens effects from nonlinear self-phase modulation in liquid suspensions of 2D nanomaterials in *Nanoscale*. He has also participated in over 10 SCI-indexed publications, many in top-tier journals like *Advanced Materials* and *ACS Photonics*.
*Science Advances* is an open-access journal published by the American Association for the Advancement of Science (AAAS), dedicated to publishing cutting-edge, impactful research across all scientific disciplines. This latest publication represents a major achievement for UESTC and underscores the growing influence of Chinese institutions in the global scientific community.
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