Effect of interface structure on mechanical properties of advanced composite materials. (1/155)

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Slippery pores: anti-adhesive effect of nanoporous substrates on the beetle attachment system. (2/155)

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Computational microscopy of the role of protonable surface residues in nanoprecipitation oscillations. (3/155)

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Ion-selective permeability of an ultrathin nanoporous silicon membrane as probed by scanning electrochemical microscopy using micropipet-supported ITIES tips. (4/155)

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Slowing the translocation of double-stranded DNA using a nanopore smaller than the double helix. (5/155)

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Enhanced microcontact printing of proteins on nanoporous silica surface. (6/155)

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Base-by-base ratcheting of single stranded DNA through a solid-state nanopore. (7/155)

We investigate the base-by-base translocation dynamics of single-stranded DNA (ssDNA) confined in a solid-state nanopore dressed with an electrostatic trap, using all-atom molecular dynamics (MD) simulation. We observe on the simulation time scale of tens of nanoseconds that ssDNA can be driven through the nanopore in a ratchetlike fashion, with a step size equal to the spacing between neighboring phosphate groups in the ssDNA backbone. A 1D-Langevin-like model is derived from atomistic dynamics which can quantitatively describe simulation results and can be used to study dynamics on longer time scales. The controlled ratcheting motion of DNA could potentially enhance the signal-to-noise ratio for nanoelectronic DNA sensing technologies.  (+info)

Replication of individual DNA molecules under electronic control using a protein nanopore. (8/155)

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