This thesis covers the detection and analysis of proteins by means of solid-state nanopores in silicon nitride. Monitoring the ionic current through a single pore permits to detect the passage of single proteins, leaving a fingerprint in the current-time trace from which information about the molecule may be derived.
In the first part, the influence of the electroosmotic flow on protein translocation is investigated. The zeta potential of pore and protein are determined independently. From the sign and magnitude of the potentials, the translocation direction under an applied electric field can be predicted.
In the second part, we investigate proteasome molecules by translocation and by trapping of single molecules in a suitable pore geometry.
The third part covers Nanoparticle-DNA conjugates, which are used to block the pore for a certain amount of time reversibly.
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This thesis covers the detection and analysis of proteins by means of solid-state nanopores in silicon nitride. Monitoring the ionic current through a single pore permits to detect the passage of single proteins, leaving a fingerprint in the current-time trace from which information about the molecule may be derived.
In the first part, the influence of the electroosmotic flow on protein translocation is investigated. The zeta potential of pore and protein are determined independently. From the...
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