Highly Flexible and Ultraprecise Manipulation of Light-Levitated Femtoliter/Picoliter Droplets

Long Jiao, Rong Chen, Xun Zhu, Qiang Liao, Hong Wang, Liang An, Jie Zhu, Xuefeng He, Hao Feng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)

Abstract

Ultraprecise manipulation of the droplets at the microscale is a promising paradigm for broad implications in reagent transport and element analysis, but the existing strategies still suffer from cross-contamination or the miscellaneous auxiliaries. Inspired by the levitation, we develop a method for excellently manipulating levitated femtoliter/picoliter droplets by a single focused laser. We show that the unique light-induced vapor flow in association with the interface morphology is responsible for creation and manipulation of levitated droplets. In particular, we demonstrate that the levitated droplets formed by this light method show extraordinary motility. The highly accurate two-dimensional labyrinth movement of the levitated droplets with designed trajectories above the free surface is easily realized by scanning the light. These results demonstrate that a single focused light can function as an "optical baton" to enable us to construct a wide variety of the long-sought precise manipulation systems for bioassays, pharmacy, and chemosynthesis.

Original languageEnglish
Pages (from-to)1068-1077
Number of pages10
JournalJournal of Physical Chemistry Letters
Volume10
Issue number5
DOIs
Publication statusPublished - 7 Mar 2019

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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