Molding, Patterning and Driving Liquids with Light

ORAL

Abstract

When a laser beam induces surface tension gradient at the free surface of a liquid, a weak surface depression is expected and has been observed. Here we report giant depression and rupture in “optothermocapillary fluids” under the illumination of laser and sunlight. Computational fluid dynamics models were developed to understand the surface deformation and provided desirable physical parameters of the fluid for maximum deformation. New optothermocapillary fluids were created by mixing transparent lamp oil with different candle dyes. They can be cut open by sunlight and be patterned to different shapes and sizes using an ordinary laser show projector or a common laser pointer. Laser driving and elevation of optothermocapillary fluids, in addition to the manipulation of different droplets on their surface, were demonstrated as an efficient controlling method and platform for optofluidic operations. The fundamental understanding of light-induced giant depression and creation of new optothermocapillary fluids encourage the fundamental research and applications of optofluidics.

*NSFC (No. 62075034 and No. 52002049).Welch Foundation (E-1728).Sichuan Science and Technology Program (No. 2021YFH0054).

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Presenters

  • Feng Lin

    • Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China
    • Yangtze Delta Region Institute (Huzhou), UESTC
    • University of Electronic Science and Technology of China

Authors

  • Feng Lin

    • Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China
    • Yangtze Delta Region Institute (Huzhou), UESTC
    • University of Electronic Science and Technology of China

  • Aamir Nasir Quraishy

    • University of Arizona

  • Runjia Li

    • University of Houston

  • Guang Yang Guang Yang

    • University of Houston

  • Mohammadjavad Mohebinia

    • University of Houston

  • Tian Tong

    • University of Houston

  • Yi Qiu

    • Southwest Petroleum University

  • Talari Vishal Talari Vishal

    • University of Houston

  • Junyi Zhao

    • Washington University in St. Louis, St. Louis
    • Washington University in St. Louis

  • Wei Zhang

    • Baylor University

  • Hong Zhong

    • University of Electronic Science and Technology of China

  • Hang Zhang

    • University of Electronic Science and Technology of China

  • Chaofu Zhou

    • University of Electronic Science and Technology of China

  • Xin Tong

    • University of Electronic Science and Technology of China

  • Peng Yu

    • University of Electronic Science and Technology of China

  • Jonathan Hu

    • Baylor University

  • Suchuan Dong

    • Purdue University

  • Dong Liu

    • University of Houston

  • Zhiming Wang

    • Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China

  • John R. Schaibley

    • University of Arizona

  • Jiming Bao

    • University of Houston