Results 41 to 50 of about 362,376 (266)

Waveguide mode imaging and dispersion analysis with terahertz near-field microscopy [PDF]

, 2009
Propagation of terahertz waves in hollow metallic waveguides depends on the waveguide mode. Near-field scanning probe terahertz microscopy is applied to identify the mode structure and composition in dielectric-lined hollow metallic waveguides.
Bowden, B., Harrington, J.A., Mark, P.R., Mitrofanov, O., Tan, T.   +4 more
core   +1 more source

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Signatures of spin-charge separation in scanning probe microscopy

, 2004
We analyze the effect of an auxiliary scatterer, such as the potential of a scanning tip, on the conductance of an interacting one-dimensional electron system.
Iddo Ussishkin, Leonid I. Glazman, M. P. A. Fisher   +2 more
core   +1 more source

Statistical Study of the Corrosion Behavior of Al2CuMg Intermetallics in AA2024-T351 by SKPFM [PDF]

, 2008
A statistical study combining atomic force microscopy, scanning Kelvin probe force microscopy (SKPFM), and energy-dispersive spectroscopy was carried out on more than 300 Al2CuMg intermetallic particles of AA2024 alloy to determine their corrosion ...
Blanc, Christine, Lacroix, Loïc, Mankowski, Georges, Ressier, Laurence   +3 more
core   +3 more sources

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Antiferromagnetic MnNi tips for spin-polarized scanning probe microscopy

, 2018
Spin-polarized scanning tunneling microscopy (SP-STM) measures tunnel magnetoresistance (TMR) with atomic resolution. While various methods for achieving SP probes have been developed, each is limited with respect to fabrication, performance, and allowed
Bilgeri, T., Brune, H., Forrester, P. R., Natterer, F. D., Patthey, F.   +4 more
core   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Nanomotion of bacteria to determine metabolic profile

Nanotechnology and Precision Engineering
In addition to their visible motion such as swimming (e.g., with the help of flagella), bacteria can also exhibit nanomotion that is detectable only with highly sensitive instruments, and this study shows that it is possible to detect bacterial ...
S. N. Pleskova, E. V. Lazarenko, N. A. Bezrukov, R. N. Kriukov, A. V. Boryakov, M. E. Dokukin, S. I. Surodin   +6 more
doaj   +1 more source

Single-Bilayer Graphene Test Structures for Kelvin Probe Microscopy

C, 2023
A new technique for determining the point spread function, which is required for measuring the surface potential using Kelvin probe microscopy (KPM), is presented. The method involves using a silicon carbide substrate coated with single-layer and bilayer
Sergey P. Lebedev, Ilya A. Eliseyev, Mikhail S. Dunaevskiy, Ekaterina V. Gushchina, Alexander A. Lebedev   +4 more
doaj   +1 more source

Carbon nanotubes as a tip calibration standard for electrostatic scanning probe microscopies

, 2002
Scanning Surface Potential Microscopy (SSPM) is one of the most widely used techniques for the characterization of electrical properties at small dimensions.
Bonnell, Dawn A., Freitag, Marcus, Johnson, A. T., Kalinin, Sergei V.   +3 more
core   +1 more source