title: Deceleration of single-stranded DNA passing through a nanopore using a nanometre-sized bead structure.
abstract: DNA sequencing with a solid-state nanopore requires a reduction of the translocation speeds of single-stranded DNA (ssDNA) over 10 μs/base. In this study, we report that a nanometre-sized bead structure constructed around a nanopore can reduce the moving speed of ssDNA to 270 μs/base by adjusting the diameter of the bead and its surface chemical group. This decelerating effect originates from the strong interaction between ssDNA and the chemical group on the surface of the bead. This nanostructure was simply prepared by dip coating in which a substrate with a nanopore was immersed in a silica bead solution and then dried in an oven. As compared with conventional approaches, our novel method is less laborious, simpler to perform and more effective in reducing ssDNA translocation speed.
authors.affiliation: Hitachi Ltd., Central Research Laboratory, 1-280 Higashi-koigakubo, Kokubunji, Tokyo, 185-8603.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Goto
authors.affiliation: Hitachi Ltd., Central Research Laboratory, 1-280 Higashi-koigakubo, Kokubunji, Tokyo, 185-8603.
authors.forename: Takanobu
authors.initials: T
authors.lastname: Haga
authors.affiliation: Hitachi Ltd., Central Research Laboratory, 1-280 Higashi-koigakubo, Kokubunji, Tokyo, 185-8603.
authors.forename: Itaru
authors.initials: I
authors.lastname: Yanagi
authors.affiliation: Hitachi Ltd., Central Research Laboratory, 1-280 Higashi-koigakubo, Kokubunji, Tokyo, 185-8603.
authors.forename: Takahide
authors.initials: T
authors.lastname: Yokoi
authors.affiliation: Hitachi Ltd., Central Research Laboratory, 1-280 Higashi-koigakubo, Kokubunji, Tokyo, 185-8603.
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Takeda
mesh_terms: D004277:DNA, Single-Stranded / Q000737:chemistry; D003654:Deceleration; D058608:Nanopores; D012822:Silicon Dioxide; D012996:Solutions
chemical_list: D004277:DNA, Single-Stranded; D012996:Solutions; D012822:Silicon Dioxide