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Surface Wrinkling for Flexible and Stretchable Sensors.

Giwon Lee1,2, Mohammad Zarei3, Qingshan Wei1

  • 1Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695, USA.

Small (Weinheim an Der Bergstrasse, Germany)
|September 1, 2022
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Summary

Surface wrinkling enhances flexible sensor performance by managing stress and increasing surface area. This review explores fabrication methods and applications for advanced wearable and multimodal sensors.

Keywords:
flexibilitysensorsstretchabilitysurface wrinklingwearable devices

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Area of Science:

  • Materials Science
  • Nanolithography
  • Wearable Electronics

Background:

  • Advancements in nanolithography, miniaturization, and material science drive the development of sensitive, flexible, and stretchable sensors.
  • Surface engineering strategies are crucial for controlling sensor electrical and mechanical properties.
  • Surface wrinkling offers a method to improve sensor performance and deformability by releasing stress and increasing surface area.

Purpose of the Study:

  • To review recent developments in fabrication strategies for wrinkling structures in sensor applications.
  • To summarize fundamental mechanics, geometry control, and fabrication methods for wrinkling patterns.
  • To assess the impact of wrinkling approaches on various sensor types and explore future applications.

Main Methods:

  • Review of fabrication strategies for wrinkling structures.
  • Summarization of fundamental mechanics and geometry control for wrinkling patterns.
  • Analysis of current wrinkling approaches and their impact on sensor development.

Main Results:

  • Wrinkling structures effectively release interfacial stress, prevent electrical failure, and enlarge surface areas in flexible and stretchable sensors.
  • Fabrication strategies, mechanics, and geometry control methods for wrinkling patterns are summarized.
  • The impact of wrinkling on strain, pressure, temperature, chemical, photodetector, and multimodal sensors is reviewed.

Conclusions:

  • Surface wrinkling is a key strategy for enhancing the performance and mechanical properties of advanced sensor systems.
  • Understanding wrinkling mechanics and fabrication is essential for developing next-generation flexible and stretchable electronics.
  • Future applications of wrinkling approaches in sensor technology are promising, particularly for multimodal and wearable devices.