Over One Million DNA and Protein Events Through Ultra‐Stable Chemically‐Tuned Solid‐State Nanopores
Jugal Saharia, Y. M. Nuwan D. Y. Bandara, Buddini I. Karawdeniya, Jason R. Dwyer, Min Jun Kim
Abstract
Abstract Stability, long lifetime, resilience against clogging, low noise, and low cost are five critical cornerstones of solid‐state nanopore technology. Here, a fabrication protocol is described wherein >1 million events are obtained from a single solid‐state nanopore with both DNA and protein at the highest available lowpass filter (LPF, 100 kHz) of the Axopatch 200B–the highest event count mentioned in literature. Moreover, a total of ≈8.1 million events are reported in this work encompassing the two analyte classes. With the 100 kHz LPF, the temporally attenuated population is negligible while with the more ubiquitous 10 kHz, ≈91% of the events are attenuated. With DNA experiments, the pores are operational for hours (typically >7 h) while the average pore growth is merely ≈0.16 ± 0.1 nm h −1 . The current noise is exceptionally stable with traces typically showing <10 pA h −1 increase in noise. Furthermore, a real‐time method to clean and revive pores clogged with analyte with the added benefit of minimal pore growth during cleaning (< 5% of the original diameter) is showcased. The enormity of the data collected herein presents a significant advancement to solid‐state pore performance and will be useful for future ventures such as machine learning where large amounts of pristine data are a prerequisite.