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- W2077024660 abstract "Nanopore sensors have emerged as a label-free and amplification-free technique for measuring single molecules. First proposed in the mid-1990s, nanopore detection takes advantage of the ionic current modulations produced by the passage of target analytes through a single nanopore at a fixed applied potential. Over the last 15 years, these nanoscale pores have been used to sequence DNA, to study covalent and non-covalent bonding interactions, to investigate biomolecular folding and unfolding, and for other applications.A major issue in the application of nanopore sensors is the rapid transport of target analyte molecules through the nanopore. Current recording techniques do not always accurately detect these rapid events. Therefore, researchers have looked for methods that slow molecular and ionic transport. Thus far, several strategies can improve the resolution and sensitivity of nanopore sensors including variation of the experimental conditions, use of a host compound, and modification of the analyte molecule and the nanopore sensor.In this Account, we highlight our recent research efforts that have focused on applications of nanopore sensors including the differentiation of chiral molecules, the study of enzyme kinetics, and the determination of sample purity and composition. Then we summarize our efforts to regulate molecular transport. We show that the introduction of various surface functional groups such as hydrophobic, aromatic, positively charged, and negatively charged residues in the nanopore interior, an increase in the ionic strength of the electrolyte solution, and the use of ionic liquid solutions as the electrolyte instead of inorganic salts may improve the resolution and sensitivity of nanopore stochastic sensors. Our experiments also demonstrate that the introduction of multiple functional groups into a single nanopore and the development of a pattern-recognition nanopore sensor array could further enhance sensor resolution.Although we have demonstrated the feasibility of nanopore sensors for various applications, challenges remain before nanopore sensing is deployed for routine use in applications such as medical diagnosis, homeland security, pharmaceutical screening, and environmental monitoring." @default.
- W2077024660 created "2016-06-24" @default.
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- W2077024660 date "2013-04-24" @default.
- W2077024660 modified "2023-09-23" @default.
- W2077024660 title "Nanopore Stochastic Detection: Diversity, Sensitivity, and Beyond" @default.
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- W2077024660 doi "https://doi.org/10.1021/ar400031x" @default.
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