Seamless Integration of Rapid Separation and Ultrasensitive Detection for Complex Biological Samples Using Multistage...

Area of Science:

• Biomaterials Science
• Nanotechnology
• Analytical Chemistry

Background:

• Current bacterial detection methods are time-consuming due to separate separation and detection steps.
• Efficient identification of bacterial diseases and transmission requires rapid and integrated analytical tools.

Purpose of the Study:

• To develop an integrated device for simultaneous separation and detection of bacteria and biomarkers.
• To improve the speed and sensitivity of bacterial diagnostics.

Main Methods:

• Fabrication of a multistage annular functionalized carbon nanotube array device.
• Utilizing rotation-assisted fluid dynamics within carbon nanotubes for sample processing.
• Integration of separation and multimarker detection capabilities.

Main Results:

• Achieved rapid separation and capture of biomarkers in 2.5 seconds per mL of sample.
• Demonstrated fast detection (<30 minutes) with high sensitivity (LOD = 1.7 CFU mL⁻¹).
• Successfully performed multitarget detection of Staphylococcus aureus, extracellular vesicles, and enterotoxin proteins.

Conclusions:

• The developed carbon nanotube device offers a streamlined platform for integrated bacterial separation and detection.
• This technology enables real-time diagnostics and rapid analysis of various disease biomarkers.
• The system shows potential for advancing infectious disease diagnostics and public health surveillance.