Now showing items 1-9 of 9

    • Dynamics of Ion Beam Stimulated Surface Mass Transport to Nanopores 

      Hoogerheide, David Paul; Golovchenko, Jene Andrew (Cambridge University Press (CUP), 2007)
      We explore the ion beam-induced dynamics of the formation of large features at the edges of nanopores in freestanding silicon nitride membranes. The shape and size of these ìnanovolcanoesî, together with the rate at which ...
    • Escape of DNA from a Weakly Biased Thin Nanopore: Experimental Evidence for a Universal Diffusive Behavior 

      Hoogerheide, David Paul; Albertorio, Fernando; Golovchenko, Jene Andrew (American Physical Society (APS), 2013)
      We report experimental escape time distributions of double-stranded DNA molecules initially threaded halfway through a thin solid-state nanopore. We find a universal behavior of the escape time distributions consistent ...
    • Ion-sculpting of Nanopores in Amorphous Metals, Semiconductors and Insulators 

      George, H. Bola; Hoogerheide, David Paul; Madi, Charbel S.; Bell, David C.; Golovchenko, Jene A.; Aziz, Michael J. (American Institute of Physics, 2010)
      We report the closure of nanopores to single-digit nanometer dimensions by ion sculpting in a range of amorphous materials including insulators (SiO\(_2\) and SiN), semiconductors (a-Si), and metallic glasses (Pd\(_{80}\ ...
    • Nanoscale Volcanoes: Accretion of Matter at Ion-Sculpted Nanopores 

      Mitsui, Toshiyuki; Stein, Derek; Kim, Young-Rok; Hoogerheide, David Paul; Golovchenko, Jene Andrew (American Physical Society (APS), 2006)
      We demonstrate the formation of nanoscale volcanolike structures induced by ion-beam irradiation of nanoscale pores in freestanding silicon nitride membranes. Accreted matter is delivered to the volcanoes from micrometer ...
    • Origins and Consequences of Velocity Fluctuations during DNA Passage through a Nanopore 

      Bo, Lu; Albertorio, Fernando; Hoogerheide, David Paul; Golovchenko, Jene A. (Biophysical Society, 2011)
      We describe experiments and modeling results that reveal and explain the distribution of times that identical double-stranded DNA (dsDNA) molecules take to pass through a voltage-biased solid-state nanopore. We show that ...
    • Pressure-Controlled Motion of Single Polymers through Solid-State Nanopores 

      Lu, Bo; Hoogerheide, David Paul; Zhao, Qing; Zhang, Hengbin; Tang, Zhipeng; Yu, Dapeng; Golovchenko, Jene Andrew (American Chemical Society (ACS), 2013)
      Voltage-biased solid-state nanopores are well established in their ability to detect and characterize single polymers, such as DNA, in electrolytes. The addition of a pressure gradient across the nanopore yields a second ...
    • Pressure–Voltage Trap for DNA near a Solid-State Nanopore 

      Hoogerheide, David; Lu, Bo; Golovchenko, Jene Andrew (American Chemical Society (ACS), 2014)
      We report the formation of a tunable single DNA molecule trap near a solid-state nanopore in an electrolyte solution under conditions where an electric force and a pressure induced viscous flow force on the molecule are ...
    • Probing surface charge fluctuations with solid-state nanopores 

      Hoogerheide, David Paul; Garaj, Slaven; Golovchenko, Jene (American Physical Society, 2009)
      We identify a contribution to the ionic current noise spectrum in solid-state nanopores that exceeds all other noise sources in the frequency band 0.1-10 kHz. Experimental studies of the dependence of this excess noise on ...
    • Thermal Activation and Saturation of Ion Beam Sculpting 

      Hoogerheide, David Paul; George, H. Bola; Golovchenko, Jene A.; Aziz, Michael J. (American Institute of Physics, 2011)
      We report a material-dependent critical temperature for ion beam sculpting of nanopores in amorphous materials under keV ion irradiation. At temperatures below the critical temperature, irradiated pores open at a rate that ...