Matter
Volume 2, Issue 1, 8 January 2020, Pages 181-193
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Article
Heartbeat-Sensing Mechanoluminescent Device Based on a Quantitative Relationship between Pressure and Emissive Intensity

https://doi.org/10.1016/j.matt.2019.10.002Get rights and content
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Highlights

  • Pure organic luminogens with self-assembly unit exhibit bright ML emission

  • The relationship between pressure and ML intensity has been established by devices

  • The flexible and wearable ML device demonstrates potential applications

  • The ML device could give a quick response to the human heartbeat

Progress and Potential

Mechanoluminescence (ML) is a fascinating emission phenomenon involving the transformation of mechanical energy to visible light. Although the first recorded discovery of ML was in the 17th century, the intrinsic mechanism has remained obscure for many years. With deeper understanding of the inherent mechanism, many pure organic ML luminogens have been developed. The clearer this inherent mechanism of ML material has become, the more eager we are to explore the value of its potential application. Here, an ML material is shown to exhibit bright ML emission by mechanical stimulation even under daylight. More excitingly, the quantitative relationship between force pressure and ML intensity has been obtained by devices based on ML material (tPE-2-Th). The wearable ML device shows potential for future application of electronic materials for communications, information storage, and health care, thus leading to improvement of our daily lives.

Summary

The pure organic mechanoluminescent luminogens (tPE-2-Th and tPE-3-Th), with their combination of aggregation-induced emission and the presence of a self-assembly unit, exhibit very bright mechanoluminescence (ML) emission even in daylight. Excitingly, the relationship between the pressure and ML intensity has been successfully established for the first time based on an ML device fabricated by tPE-2-Th. Furthermore, the flexible and wearable ML device demonstrates potential applications in communications, information storage, and health care. In particular, it provides a quick response to the human heartbeat, offering a new approach for the monitoring of force stimuli in daily life.

Material Advancement Progression

MAP6: Development

Keywords

mechanoluminescence
triboluminescence
packing mode
quantification
wearable device
heartbeat detection
applications
communications
aggregation-induced emission and force pressure

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