Boronate probe-based hydrogen peroxide detection with AlGaN/GaN HEMT sensor

Area of Science:

• Materials Science
• Biotechnology
• Sensor Technology

Background:

• Reactive oxygen species, such as hydrogen peroxide, play crucial roles in intracellular signaling and oxidative stress.
• Accurate and real-time detection of these molecules is vital for understanding biological processes and disease mechanisms.

Purpose of the Study:

• To investigate the potential of AlGaN/GaN high electron mobility transistor (HEMT) sensors for detecting reactive biological molecules.
• To utilize a boronate-based fluorescent probe in conjunction with the HEMT sensor for sensitive hydrogen peroxide detection.

Main Methods:

• Fabrication and characterization of an AlGaN/GaN HEMT sensor.
• Integration of a boronate-based fluorescent probe for hydrogen peroxide sensing.
• Real-time monitoring of electrical signals (two-dimensional electron gas current) and fluorescence intensity during the reaction.

Main Results:

• The AlGaN/GaN HEMT sensor successfully detected micromolar levels of hydrogen peroxide.
• A decrease in the HEMT sensor's two-dimensional electron gas current was observed in real-time as the reaction progressed.
• A corresponding increase in fluorescence intensity from the boronate probe confirmed hydrogen peroxide detection.

Conclusions:

• AlGaN/GaN HEMT sensors show significant potential for detecting reactive and transient biological molecules like hydrogen peroxide.
• The combined HEMT sensor and fluorescent probe system enables dynamic, real-time monitoring of biological reactions.
• This technology offers a promising platform for studying reactive oxygen species in biological systems.