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Synchronous optical and electrical detection of biomolecules traversing through solid-state nanopores.


ABSTRACT: We present a novel method for integrating two single-molecule measurement modalities, namely, total internal reflection microscopy and electrical detection of biomolecules using nanopores. Demonstrated here is the electrical measurement of nanopore based biosensing performed simultaneously and in-sync with optical detection of analytes. This method makes it possible, for the first time, to visualize DNA and DNA-protein complexes translocating through a nanopore with high temporal resolution (1000 frames/s) and good signal to background. This paper describes a detailed experimental design of custom optics and data acquisition hardware to achieve simultaneous high resolution electrical and optical measurements on labeled biomolecules as they traverse through a approximately 4 nm synthetic pore. In conclusion, we discuss new directions and measurements, which this technique opens up.

SUBMITTER: Soni GV 

PROVIDER: S-EPMC2821415 | biostudies-other | 2010 Jan

REPOSITORIES: biostudies-other

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