Journal: AMB Express

Article Title: 600-ns pulsed electric fields affect inactivation and antibiotic susceptibilities of Escherichia coli and Lactobacillus acidophilus

doi: 10.1186/s13568-020-00991-y

Figure Lengend Snippet: nsPEF exposure characterization. A schematic of the Marx bank capacitor system used to deliver the 600-ns PEF is provided ( a ). Representative oscilloscope traces of the applied voltages used to deliver an E-field amplitude of 13.5 (blue), 18.5 (black) or 23.5 (red) kV cm −1 ( b ) are shown. COMSOL Multiphysics ® software was used to model the predicted E-field throughout the electroporation cuvette (both the x and y axis are equal in scale) ( c )

Article Snippet: COMSOL Multiphysics ® software v. 4.3b (COMSOL) was used to model E-field distribution within the exposure cuvette.

Techniques: Software, Electroporation

Journal: Nano Letters

Article Title: Photoresistance Switching of Plasmonic Nanopores

doi: 10.1021/nl504516d

Figure Lengend Snippet: Solid-state nanopore integrated with a plasmonic nanoslit cavity. (a) Schematic representation of the concept. Plasmon-induced effects are measured electrically through changes in the ionic current flowing through the nanopore. (b) Three-dimensional schematic representation of the plasmonic nanopore device, consisting of a plasmonic cavity on top of a nanopore. The figure is not to scale and the membrane may also not be perfectly uniform. The arrows indicate the longitudinal and transverse direction of plasmon excitation. (c) The membrane formation process involves coating the membrane with PECVD silicon nitride, followed by sputtering of Au and an additional layer of PECVD silicon nitride. Finally, a nanopore is drilled using a TEM. (d) SEM images of the plasmonic nanocavity. (e) TEM image of a silicon nitride membrane surrounded by the gold nanocavity. The yellow dashed line indicates the designed boundary of the gold cavity. (f) Zoomed TEM image of the top part of panel (e), showing a typical 10 nm nanopore inside the gold nanocavity (marked by the arrow). The interfaces between the gold and the SiN are delineated by a yellow dashed curve and the nanopore is marked with a red dashed circle overlaid on the image.

Article Snippet: We simulated the I–V response of the plasmonic pore-in-cavity using COMSOL Multiphysics 4.3b (see section).

Techniques: Membrane

Journal: Nano Letters

Article Title: Photoresistance Switching of Plasmonic Nanopores

doi: 10.1021/nl504516d

Figure Lengend Snippet: Ionic currents upon plasmonic excitation. (a) Ionic current versus time for 2 mW and 15 mW illumination turned on at 1 s, recorded at −100 mV. The sign of the current traces is reversed for clarity. The dashed lines indicate the open-pore current level I 0 before light illumination. (b) Normalized current deviation I / I 0 as a function of laser power at −100 mV. Blue and brown points indicate the laser powers of 2 mW and 15 mW, respectively. The dashed line at I / I 0 = 1 divides the figure into a top area of current increase and a bottom area of current decrease. (c) Current–voltage curves at 0 mW (black), 2 mW (blue), and 15 mW (brown). (d) Rectification ratio γ(100 mV) versus laser power. The dashed line of γ(100 mV) = 1 indicates perfect linearity.

Article Snippet: We simulated the I–V response of the plasmonic pore-in-cavity using COMSOL Multiphysics 4.3b (see section).

Techniques:

Journal: Nano Letters

Article Title: Photoresistance Switching of Plasmonic Nanopores

doi: 10.1021/nl504516d

Figure Lengend Snippet: Numerical simulation of current–voltage curves of plasmonic nanopores. (a) Schematics that represents the three different simulations. The blue scenario 1 represents the nanopore without any bubble, whereas the brown scenario 2 has a nanobubble on top. The gray scenario 3 has a bubble at the other side of the pore entrance. (b) Simulated I – V curves of three scenarios in panel a.

Article Snippet: We simulated the I–V response of the plasmonic pore-in-cavity using COMSOL Multiphysics 4.3b (see section).

Techniques: