Fudan University, Dalian University of Technology, and Peking University: Research on an Ultra Thin

Fudan University, Dalian University of Technology, and Peking University: Research on an Ultra Thin Axial Strain Sensor

1. Disadvantages of existing technology:

Limited sensitivity: Existing strain gauge methods typically can only sense under quasi-static conditions and have insufficient sensitivity to accurately monitor the dynamic and multi-directional strain on the surface of living organisms.

Directional limitations: Many existing technologies only optimize perception for specific directions, lacking the ability to monitor strain in multiple directions, which limits their application in complex biomechanical monitoring, especially in dynamic monitoring of tissues such as the heart and skin.

Multi directional strain monitoring: The author proposes a novel implantable/wearable strain gauge that integrates multiple ultra-thin single crystal silicon sensors arranged in different directions, which can dynamically monitor strain in multiple directions and provide more accurate biomechanical information.

High sensitivity and accuracy: This strain gauge has a sensitivity of up to 0.1% and can monitor complex biological signals in real time, such as intraocular pressure fluctuations and pulse. In vitro experiments, the relative deviation of its direction was only 1 °, demonstrating excellent directional specificity response.

Clinical application potential: This device can achieve dynamic monitoring in vivo, such as for the diagnosis of heart diseases (such as myocardial infarction and arrhythmia), and can accurately locate the pathological direction of the lesion site.

Biodegradability: This strain gauge is designed as a biodegradable biomaterial that can be completely degraded when used in vivo, with better biocompatibility and suitable for long-term implantation.

3. Application scenarios:

Heart disease monitoring: This strain gauge can be used to monitor the surface strain of the heart in real-time, helping to diagnose and locate cardiac lesions such as myocardial infarction and arrhythmia.

Eye pressure monitoring: capable of dynamically monitoring changes in intraocular pressure, applied to the diagnosis and treatment monitoring of ophthalmic diseases such as glaucoma.

Biomechanics research: This technology can be used in a wide range of biomedical studies to monitor the dynamic mechanical properties of soft tissues and organs.

Implantable medical devices: As degradable implantable devices, they can be used for long-term biomechanical monitoring and provide personalized disease diagnosis data.

4. Summary:

The ultra-thin single crystal silicon strain gauge (OSG sensor) proposed by the author breaks through the limitations of existing technology and has the ability to monitor strain in multiple directions and ultra-high sensitivity, providing accurate diagnostic information in complex dynamic biomechanical monitoring. This sensor can not only be used as a wearable device for daily monitoring, but also as an implantable device for real-time, long-term biomechanical monitoring. Its biocompatibility and degradability make it widely applicable in clinical treatment, especially in the research of heart disease, ophthalmic disease, and soft tissue mechanics.

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