Results 51 to 60 of about 6,547,132 (319)

Evolution and stabilization of subnanometric metal species in confined space by in situ TEM

open access: yesNature Communications, 2018
Understanding the behavior and dynamic structural transformation of subnanometric metal species under reaction conditions will be helpful for understanding catalytic phenomena and for developing more efficient and stable catalysts based on single atoms ...
Lichen Liu   +5 more
semanticscholar   +1 more source

Distribution of Electrical Resistivity in Single Carbon Fiber Filaments and Its Correlation With Tensile Modulus

open access: yesAdvanced Engineering Materials, Volume 28, Issue 6, 18 March 2026.
A statistical framework is applied to quantify the distribution of electrical resistivity among individual filaments of two commercially available carbon fiber types. Correlations between filament resistivity, tensile modulus, and diameter are examined and complemented by TEM analysis to provide new insight into filament‐level variability relevant for ...
Nils Wieja   +9 more
wiley   +1 more source

Atomic‐Scale Insights Into Antisite‐Defect‐Induced Metallicity in Halide Perovskites

open access: yesSmall, Volume 22, Issue 14, 6 March 2026.
Using an aberration‐corrected scanning transmission electron microscope, we identify that the PbCs antisite defect in CsPbBr3 shortens the Pb─Pb bond by ∼20 pm, and induces local strain and polarization, leading to a semiconductor‐to‐metal transition.
Sanxia Yin   +7 more
wiley   +1 more source

Virtual and augmented reality as tools for improving students' performance in STEM fields

open access: yesFrontiers in Education
BackgroundAdvancements in science and technology are continuously transforming education by integrating innovative instructional methods. Over the past two decades, Virtual Reality (VR) and Augmented Reality (AR) have emerged as powerful tools, offering ...
Krenare Pireva Nuci, Kyvete Shatri
doaj   +1 more source

A novel approach to pulsed laser deposition of platinum catalyst on carbon particles for use in polymer electrolyte membrane fuel cells

open access: yesBeilstein Journal of Nanotechnology, 2023
The research undertaken aimed to develop an efficient Pt-based catalyst for polymer electrolyte membrane fuel cells (PEMFCs) by using a cost-effective and efficient physical method to deposit platinum nanoparticles (PtNPs) on carbon supports directly ...
Bogusław Budner   +5 more
doaj   +1 more source

Consequences of the CMR effect on EELS in TEM

open access: yes, 2017
Double perovskite oxides have gained in importance and exhibit negative magnetoresistance, which is known as colossal magnetoresistance (CMR) effect. Using a La$_2$CoMnO$_6$ (LCM) thin film we prove that the physical consequences of the CMR effect do ...
Navickas, Edvinas   +2 more
core   +1 more source

Prevalence of TEM, SHV, and CTX-M Beta-Lactamase genes in the urinary isolates of a tertiary care hospital

open access: yesAvicenna Journal of Medicine, 2017
Introduction: Extended-spectrum beta-lactamases (ESBLs) are the major cause of resistance to beta-lactam antibiotics such as penicillins, cephalosporins, and monobactams.
T. Bajpai   +3 more
semanticscholar   +1 more source

Experimental Hypervelocity Dust Impacts in Olivine—Multiscale Insights Into Microcrater Shock and Melting Effects From Coordinated SEM/TEM Observations

open access: yesJournal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract The flux of solar system meteoroids is dominated by objects less than 1 mm in diameter whose impact effects play a major role in the space weathering of airless body surfaces. These effects remain poorly characterized with respect to their dependence on the range of impact speeds for meteoroids across the inner solar system.
R. Christoffersen   +8 more
wiley   +1 more source

Antibacterial Resistance Pattern in Clinical and Non-clinical Bacteria by Phenotypic and Genotypic Assessment

open access: yesJournal of Pure and Applied Microbiology, 2021
Bacterial infections represent a very serious problem that threatens human health, antibiotics were designed to attack the causative agents of infectious diseases, but some bacterial pathogens became virulent and resistant to antibiotics by different ...
Mohamed Shawky   +2 more
doaj   +1 more source

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