Nanofluidic Biosensor Created by Bonding Patterned Model Cell Membrane and Silicone Elastomer with Silica...

Area of Science:

• Biotechnology
• Nanotechnology
• Analytical Chemistry

Background:

• Selective detection of molecules is vital for diagnostics and environmental monitoring.
• Existing methods face challenges with complex sample matrices containing diverse coexisting molecules.

Purpose of the Study:

• To develop a nanofluidic biosensor for sensitive and selective detection of target molecules.
• To utilize silica nanoparticles for creating a stable nanogap-junction structure.

Main Methods:

• Fabrication of a nanofluidic biosensor by bonding a model cell membrane and PDMS using silica nanoparticles.
• Formation of a nanogap-junction with controllable thickness determined by nanoparticle size.
• Selective transport of target molecules via lateral diffusion into the nanogap-junction.

Main Results:

• The nanogap-junction structure enabled selective capture and detection of target molecules.
• Smaller silica nanoparticles resulted in thinner gaps, enhancing sensitivity and signal-to-background ratio.
• The platform demonstrated robustness and long-term stability for sensing applications.

Conclusions:

• Silica nanoparticle-mediated nanogap-junctions offer a versatile platform for highly selective and sensitive biosensing.
• This approach effectively detects target molecules even in the presence of high concentrations of interfering substances.
• The developed biosensor holds promise for advanced diagnostic and environmental monitoring applications.