中国物理B ›› 2018, Vol. 27 ›› Issue (5): 54209-054209.doi: 10.1088/1674-1056/27/5/054209

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Microparticle collection for water purification based on laser-induced convection

Zhi-Hai Liu(刘志海), Jiao-Jie Lei(雷皎洁), Yu Zhang(张羽), Ya-Xun Zhang(张亚勋), Xing-Hua Yang(杨兴华), Jian-Zhong Zhang(张建中), Yun Yang(杨军), Li-Bo Yuan(苑立波)   

  1. Photonics Research Center, School of Science, Harbin Engineering University, Harbin 150001, China
  • 收稿日期:2017-11-23 修回日期:2018-01-26 出版日期:2018-05-05 发布日期:2018-05-05
  • 通讯作者: Yu Zhang E-mail:zhangy0673@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos.11574061,61405043,and 61675053),the 111 Project,China (Grant No.B13015),and the Fundamental Research Funds for Harbin Engineering University of China.

Microparticle collection for water purification based on laser-induced convection

Zhi-Hai Liu(刘志海), Jiao-Jie Lei(雷皎洁), Yu Zhang(张羽), Ya-Xun Zhang(张亚勋), Xing-Hua Yang(杨兴华), Jian-Zhong Zhang(张建中), Yun Yang(杨军), Li-Bo Yuan(苑立波)   

  1. Photonics Research Center, School of Science, Harbin Engineering University, Harbin 150001, China
  • Received:2017-11-23 Revised:2018-01-26 Online:2018-05-05 Published:2018-05-05
  • Contact: Yu Zhang E-mail:zhangy0673@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos.11574061,61405043,and 61675053),the 111 Project,China (Grant No.B13015),and the Fundamental Research Funds for Harbin Engineering University of China.

摘要: Water purification is required for environmental protection. In this paper, we propose and demonstrate a rapid, effective and low-cost approach to collect numerous impurities (microparticles) in water on the basis of laser-induced thermal convection. We introduce a heat source by using a fiber tip, which is fabricated into a non-adiabatic-tapered shape. In order to improve the laser power absorption efficiency, we coat a gold film with a thickness of 300 nm on the fiber tip. Due to absorption, the laser power transferred from the fiber to the water results in thermal convection. The forces generated from the thermal convection drive the microparticles to move towards the fiber tip, thereby performing microparticle collection and achieving water purification. Laser-induced thermal convection provides a simple, high-efficiency and low-cost method of collecting microparticles, which is a suitable and convenient for local water purification.

关键词: optical trapping, microstructures and particles, water purification

Abstract: Water purification is required for environmental protection. In this paper, we propose and demonstrate a rapid, effective and low-cost approach to collect numerous impurities (microparticles) in water on the basis of laser-induced thermal convection. We introduce a heat source by using a fiber tip, which is fabricated into a non-adiabatic-tapered shape. In order to improve the laser power absorption efficiency, we coat a gold film with a thickness of 300 nm on the fiber tip. Due to absorption, the laser power transferred from the fiber to the water results in thermal convection. The forces generated from the thermal convection drive the microparticles to move towards the fiber tip, thereby performing microparticle collection and achieving water purification. Laser-induced thermal convection provides a simple, high-efficiency and low-cost method of collecting microparticles, which is a suitable and convenient for local water purification.

Key words: optical trapping, microstructures and particles, water purification

中图分类号:  (Mechanical effects of light on material media, microstructures and particles)

  • 42.50.Wk
87.80.Cc (Optical trapping) 81.20.Ym (Purification)