Results 41 to 50 of about 1,143,277 (293)
Low voltage scanning electron microscopy [PDF]
Journal of Microscopy, 1984 SUMMARYThe scanning electron microscope (SEM) is usually operated with a beam voltage, V0, in the range of 10–30 kV, even though many early workers had suggested the use of lower voltages to increase topographic contrast and to reduce specimen charging and beam damage. The chief reason for this contradiction is poor instrumental performance when V0=1–3
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Scanning Electron Microscopy in modern dentistry research
Brazilian Dental Science, 2012 The purpose of this article was to review the usage of Scanning Electron Microscopy (SEM) in dentistry research nowadays, through a careful and updated literature review.
Thaís Cachuté Paradella +1 more
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Biomass derived mesoporous carbon monoliths via an evaporation-induced self-assembly [PDF]
, 2013 Evaporation-induced self-assembly has been applied in the synthesis of crack-free mesoporous carbon monolith with good mechanical stability using a waste plant material as carbon precursor and triblock copolymer F127 as template.
Elaigwu, Sunday E., Greenway, Gillian M.
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4D Scanning Ultrafast Electron Microscopy: Visualization of Materials Surface Dynamics [PDF]
, 2011 The continuous electron beam of conventional scanning electron microscopes (SEM) limits the temporal resolution required for the study of ultrafast dynamics of materials surfaces. Here, we report the development of scanning ultrafast electron microscopy (
Mohammed, Omar F. +3 more
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Nature Communications, 2023 Transmission electron microscopy is a pivotal instrument in materials and biological sciences due to its ability to provide local structural and spectroscopic information on a wide range of materials.
Jonathan J. P. Peters +6 more
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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
Residual strain in free-standing CdTe nanowires overgrown with HgTe
, 2018 We investigate the crystal properties of CdTe nanowires overgrown with HgTe. Scanning electron microscopy (SEM) and scanning transmission electron microscopy (STEM) confirm, that the growth results in a high ensemble uniformity and that the individual ...
Brüne, C. +5 more
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Realization of aligned three-dimensional single-crystal chromium nanostructures by thermal evaporation [PDF]
, 2010 Aligned three-dimensional single-crystal chromium nanostructures are fabricated onto a silicon substrate by thermal evaporation in a conventional thermal evaporator, where the incident angle of Cr vapor flux with respect to the substrate surface normal ...
Alphonse, Pierre +3 more
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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 +11 more
wiley +1 more source
Analysis and applications of a heralded electron source
New Journal of PhysicsWe analytically describe the noise properties of a heralded electron source made from a standard electron gun, a weak photonic coupler, a single photon counter, and an electron energy filter.
Stewart A Koppell +5 more
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