Work

A versatile optoelectronic device for ultrasensitive negative-positive pressure sensing applications

Year: 2024

Type: article

Abstract: A versatile optoelectronic device with ultrasensitive negative-positive pressure sensing capabilities, which is integrated with a wireless monitoring system, was fabricated and demonstrated in the current work. The device comprises a monolithic GaN chip with a polydimethylsiloxane cavity and nanograting, which effectively transduces pressure stimuli into optical changes detected by the GaN chip. The developed device exhibits an ultra-low detection limit for a mass of 0.03 mg, a pressure of 2.94 Pa, and a water depth of 0.3 mm, with a detection range of −100 kPa to 30.5 kPa and high stability. The versatility of the device is demonstrated by its ability to monitor heart pulse, grip strength, and respiration. Its integration with a wireless data transmission system enables real-time monitoring of human activity and heart rate underwater, making it suitable for precise measurements in various practical applications.

Source: Chip

DOI: 10.1016/j.chip.2024.100116

Authors: Xiaoshuai An, Sizhe Gui, Yingxin Li, Zhiqin Chu, Kwai Hei Li

Institutions: Southern University of Science and Technology, University of Hong Kong

Language: English

Topic: Advanced Sensor and Energy Harvesting Materials

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,000

Funders: National Natural Science Foundation of China, Shenzhen Fundamental Research Program