Assembly of Topographical Micropatterns with Optoelectronic Tweezers

Shuailong Zhang, Yifan Zhai, Ran Peng, Moein Shayegannia, Andrew G. Flood, Juntian Qu, Xinyu Liu, Nazir P. Kherani, Aaron R. Wheeler*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Topographical micropatterns (TMPs), or ordered arrays of 3D features on a flat surface, have become important for a wide range of applications. A new optofluidic method based on optoelectronic tweezers to assemble TMPs from suspensions of microparticles in fluid is reported. After assembly, TMPs can be freeze-dried and then transferred to alternate substrates. 3D simulations are carried out to clarify the experimental results and techniques are developed to evaluate pattern-transfer fidelity, which is found to be >90% for a wide range of different structures. The optofluidic assembly method described here is facile and accessible, suggesting utility for a wide range of microfabrication and microassembly applications in the future.

Original languageEnglish
Article number1900669
JournalAdvanced Optical Materials
Volume7
Issue number20
DOIs
Publication statusPublished - 1 Oct 2019
Externally publishedYes

Keywords

  • flexible substrate
  • freeze-drying
  • microassembly
  • micropatterns
  • microstructures
  • optical micromanipulation
  • transfer technology

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