An integrated system for optical and electrical detection of single molecules/particles inside a solid-state nanopore

Area of Science:

• Nanotechnology
• Single-molecule detection
• Biosensing

Background:

• Nanopore techniques are valuable for single-molecule detection.
• Combining optical and electrical detection offers parallel readout without complex nanofluidics.
• Existing methods may lack detailed analyte information.

Purpose of the Study:

• To develop an integrated system for label-free optical and electrical detection of single molecules.
• To utilize a metal-coated nanopore for simultaneous signal generation.
• To enable parallel readout of multiple nanopores.

Main Methods:

• Fabrication of an integrated system with dark-field microscopy and ultralow current detection.
• Utilizing an Au-coated nanopore for light scattering measurements.
• Correlated optical and electrical readout of single analytes.

Main Results:

• Successful design and fabrication of the integrated optical and electrical detection system.
• Demonstration of light scattering from a single Au-coated nanopore.
• Achieved correlated optical and electrical readout for single-molecule analysis.

Conclusions:

• The developed integrated system enables label-free, single-molecule detection.
• Metal-coated nanopores facilitate combined optical and electrical measurements.
• This approach offers potential for more detailed analyte information than traditional methods.