Electrostatic tweezer for droplet manipulation

Yuankai Jin, Wanghuai Xu, Huanhuan Zhang, Ruirui Li, Jing Sun, Siyan Yang, Minjie Liu, Haiyang Mao, Zuankai Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)


Various physical tweezers for manipulating liquid droplets based on optical, electrical, magnetic, acoustic, or other external fields have emerged and revolutionized research and application in medical, biological, and environmental fields. Despite notable progress, the existing modalities for droplet control and manipulation are still limited by the extra responsive additives and relatively poor controllability in terms of droplet motion behaviors, such as distance, velocity, and direction. Herein, we report a versatile droplet electrostatic tweezer (DEST) for remotely and programmatically trapping or guiding the liquid droplets under diverse conditions, such as in open and closed spaces and on flat and tilted surfaces as well as in oil medium. DEST, leveraging on the coulomb attraction force resulting from its electrostatic induction to a droplet, could manipulate droplets of various compositions, volumes, and arrays on various substrates, offering a potential platform for a series of applications, such as high-throughput surface-enhanced Raman spectroscopy detection with single measuring time less than 20 s.

Original languageEnglish
Article numbere2105459119
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number2
Publication statusPublished - 11 Jan 2022
Externally publishedYes


  • Droplet manipulation
  • Electrostatic induction
  • SERS
  • Tweezer

ASJC Scopus subject areas

  • General


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