Label-free immunodetection with CMOS-compatible semiconducting nanowires.

Area of Science:

• Nanotechnology
• Biosensing
• Materials Science

Background:

• Semiconducting nanowires show promise for sensitive biosensing.
• Current methods using 'bottom-up' or 'top-down' fabrication have integration and performance issues.
• Label-free detection of low concentrations of pathogens is a significant challenge.

Purpose of the Study:

• To develop a CMOS-compatible fabrication method for semiconducting nanowire sensors.
• To demonstrate label-free detection of antibodies and real-time monitoring of cellular immune response.
• To overcome integration challenges and enable system-scale applications.

Main Methods:

• Utilized complementary metal oxide semiconductor (CMOS) field effect transistor compatible technology.
• Fabricated nanowire-like devices using a novel approach.
• Performed label-free detection of antibodies at femtomolar concentrations.
• Monitored cellular immune response in real time.

Main Results:

• Achieved specific label-free detection of antibodies below 100 femtomolar concentrations.
• Demonstrated real-time monitoring of the cellular immune response.
• Eliminated the need for hybrid fabrication methods.
• Enabled system-scale integration with signal processing.

Conclusions:

• The developed CMOS-compatible nanowire sensor technology overcomes previous fabrication and integration limitations.
• This approach facilitates widespread diagnostic applications by enabling real-time monitoring of biological processes.
• The technology holds potential for sensitive and selective detection of pathogenic microorganisms and other analytes.