Fabrication of an arrayed microstructure surface using a femtosecond laser for colloidal particles self-assembly

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Ye Qiu
  • Haibo Yu
  • Jianchen Zheng
  • Xiaoduo Wang
  • Yuzhao Zhang
  • Hao Luo
  • Wenxiu Zhao
  • Yangdong Wen
  • Lianqing Liu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number108573
Journal / PublicationOptics and Laser Technology
Volume156
Online published17 Aug 2022
Publication statusPublished - Dec 2022

Abstract

Particle patterning, referred to as colloidal patterning or natural patterning, has wide applications in the development of devices for photonic and surface-enhanced Raman spectroscopy applications. On the other hand, interfacial materials with special wettability properties have gained significant research interest over the past decade. In this study, we developed a self-assembly method for particle patterning using femtosecond (fs)-laser micromachined micro-concave arrays to modify surface wettability. Experimental results showed that arrays of micro-concave structures could reduce the water contact angle from 68° to 36°, thereby increasing the wettability of a surface and providing a uniform dispersion of polystyrene (PS) micro-particles. Subsequently, surfaces with different patterns consisting of these micro-concave structures were used to create more complex patterns of particles on silicon substrates; the patterned particles were able to be transferred to PDMS surfaces directly to create micro-particle templates on the flexible PDMS surface. This work provides new applications for fs-laser micro/nano processing and insights for the advancement of micro/nanoparticle self-assembly processes and transfer-printing in the future.

Research Area(s)

  • Colloidal particles, Femtosecond laser, Particle patterning, Self-assembly, Surface wettability

Citation Format(s)

Fabrication of an arrayed microstructure surface using a femtosecond laser for colloidal particles self-assembly. / Qiu, Ye; Yu, Haibo; Zheng, Jianchen; Wang, Xiaoduo; Zhang, Yuzhao; Luo, Hao; Zhao, Wenxiu; Wen, Yangdong; Liu, Lianqing; Li, Wen Jung.

In: Optics and Laser Technology, Vol. 156, 108573, 12.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review