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

doi:10.1002/adom.201900669

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

University of Toronto

Research output: Contribution to journal › Article › peer-review

16 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 language	English
Article number	1900669
Journal	Advanced Optical Materials
Volume	7
Issue number	20
DOIs	https://doi.org/10.1002/adom.201900669
Publication status	Published - 1 Oct 2019
Externally published	Yes

Keywords

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

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10.1002/adom.201900669

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title = "Assembly of Topographical Micropatterns with Optoelectronic Tweezers",

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.",

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AU - Zhang, Shuailong

AU - Zhai, Yifan

AU - Peng, Ran

AU - Shayegannia, Moein

AU - Flood, Andrew G.

AU - Qu, Juntian

AU - Liu, Xinyu

AU - Kherani, Nazir P.

AU - Wheeler, Aaron R.

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AB - 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.

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KW - microassembly

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KW - microstructures

KW - optical micromanipulation

KW - transfer technology

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Assembly of Topographical Micropatterns with Optoelectronic Tweezers

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Keywords

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