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Monitoring Protein Adsorption with Solid-state Nanopores
Published on: December 2, 2011
Dynamics of Heparin Translocations Through Solid-State Nanopores
Kexin Zhao1, Matthew Waugh1, Kyle Briggs1
1Department of Physics, University of Ottawa, Ottawa, Ontario, Canada.
Electrophoresis
|June 19, 2026
Summary
Analyzing heparin using nanopore sensing is challenging due to rapid molecule passage. Current methods lack the resolution to distinguish heparin from toxic contaminants, hindering medical applications.
Area of Science:
- Biomolecular analysis
- Nanotechnology applications in medicine
- Carbohydrate chemistry
Background:
- Carbohydrates are vital biomolecules with medical uses.
- Current single-molecule analysis methods for carbohydrates are insufficient.
- Heparin, an anticoagulant, has a toxic contaminant requiring differentiation.
Purpose of the Study:
- To investigate heparin molecule translocation through solid-state nanopores.
- To understand the kinetics and dynamics of heparin passage.
- To explore pH-dependent molecular interactions within the nanopore.
Main Methods:
- Experimental study of heparin translocation using solid-state nanopores.
- Signal simulations to analyze translocation dynamics.
- Examination of molecular interaction as a function of pH.
Main Results:
- Translocation durations through bare silicon nitride pores are too brief for reliable heparin differentiation.
- Physical mechanisms governing translocation were elucidated.
- Challenges in achieving high-resolution single-molecule carbohydrate sensing were identified.
Conclusions:
- Current nanopore sensing struggles with rapid translocation of short polysaccharides like heparin.
- Distinguishing heparin from its toxic contaminant remains a significant challenge.
- Future research should focus on enhancing pore properties or detection methods for improved resolution.
