Results 191 to 200 of about 1,293,751 (246)

Nanosecond, Nanometer Movies of MEMS/NEMS Dynamics in a Standard SEM Using Time‐Tagged Secondary Electrons

Small Methods, EarlyView.
For the observation of micromechanical devices, a fast imaging technique with high temporal resolution is needed. Here, we demonstrate that a standard scanning electron microscope can be converted into a time‐resolving instrument using a fast detector and a time‐to‐digital converter.
Joel Rehmann, Constantin Schalast, Karsten Kunze, Jan Rhensius, Yves Acremann   +4 more
wiley   +1 more source

Atomic‐Scale Insights Into Tramp Element Segregation and Mechanical Performance of a Low‐Carbon Steel

steel research international, EarlyView.
Despite increased hardness, elevated tramp element concentrations in a ferritic‐pearlitic low‐carbon steel lead to enhanced toughness accompanied by a more homogeneous and finer ferritic microstructure. Atom probe tomography reveals pronounced segregation of some tramp elements at grain boundaries and ferrite–cementite interfaces, together with ...
Lukas Hatzenbichler, Maximilian Graf, Phillip Haslberger, Daniel Marian Ogris, Matthew Galler, Oleksandr Glushko, Ronald Schnitzer   +6 more
wiley   +1 more source

Tracking Photocatalytic Pathways With In Situ Surface‐Enhanced Raman Spectroscopy

Transformative Chemistry, EarlyView.
In situ SERS captures surface molecular fingerprints during photocatalysis, revealing transient intermediates, bond evolution, pathway selectivity, and charge‐coupled molecular transformation beyond catalyst‐ or product‐centered characterization. This review maps SERS‐active platforms and future site‐specific, time‐resolved, intelligent strategies for ...
Chenyang Gao, Wenqing Jiang, Aochi Liu, Yujiao Xie, Aiguo Wu, Jie Lin   +5 more
wiley   +1 more source

Advancing collagen‐related pathology assessment through second‐harmonic generation imaging

Journal of Microscopy, EarlyView.
Abstract Collagen remodelling and dysregulation are the hallmarks of diverse pathological conditions. In this context, second‐harmonic generation (SHG) imaging has emerged as a powerful label‐free modality for assessing collagen. This offers submicron resolution, intrinsic optical sectioning, and deeper imaging capabilities without the need for ...
Jackson Rodrigues, Manikanth Karnati, Gagan Raju, Edwin Pious, Ankur Gogoi, Guan‐Yu Zhuo, Nirmal Mazumder, Fu‐Jen Kao   +7 more
wiley   +1 more source

Using confocal microscopy and image processing to measure properties of sub‐resolution cell structures: Application to cardiac transverse tubules

Journal of Microscopy, EarlyView.
Abstract Confocal microscopes increase the resolution of images by rejecting unwanted data from the out of focus regions of the specimen. This incurs a penalty in the recorded signal to noise ratio that may be partially ameliorated by inputting additional information during image processing.
Mark B. Cannell, Cherrie H. T. Kong
wiley   +1 more source

Comparison of surface treatment protocols for a 3D‐printable resin for definitive crowns: Effects on surface roughness and bonding performance

Journal of Prosthodontics, EarlyView.
Abstract Purpose This study aimed to compare the effects of surface treatment protocols on the surface roughness and shear bond strength (SBS) of a three‐dimensional (3D)‐printable resin for definitive crowns. Materials and Methods A 3D‐printable resin for definitive crowns (Saremco Print Crowntec) was used to produce 168 specimens (10 × 10 × 2 mm3 ...
Engin Sacu, Mehmet Can Ararat, Sinan Fidan, Satılmış Ürgün, Mustafa Özgür Bora, Neslihan Tekce   +5 more
wiley   +1 more source

Zebrafish as a practical and convenient model for the study of photodynamic and photothermal therapy of solid tumors: A scoping review

Photochemistry and Photobiology, EarlyView.
Zebrafish provide a high‐throughput, optically transparent platform for cancer and drug screening. Their ~80% genetic homology, xenograft compatibility, and transgenic strains enable targeted photosensitizer screening, real‐time ROS and tumor imaging, and mechanistic assays, while fish embryo acute toxicity (FET) and in vitro tests streamline toxicity ...
Ethan Wilson, Alexander Fiorentino, Brian W. Booth, Valery Bliznyuk, Diana Ivankovic, Luigi Boccuto   +5 more
wiley   +1 more source

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Superresolved femtosecond laser ablation

Optics Letters, 2007
The determinist behavior of the femtosecond ablation process allows morphing features well under the diffraction limit by utilizing the thresholding effect, down to the nanometer scale. Because there are a vast range of applications where scaling down the size of the features is a major concern, we investigate the use of superresolving pupil plane ...
MERANO, MICHELE, BOYER G, TRISORIO A, CHERIAUX G, MOUROU G.   +4 more
openaire   +3 more sources

Femtosecond uv excimer laser ablation

Applied Physics B Photophysics and Laser Chemistry, 1987
Experiments on the ablation of polymethylmethacrylate (PMMA) with 300 fs uv excimer laser pulses at 248 nm are reported for the first time. With these ultrashort pulses, ablation can be done at fluences up to five times lower than the threshold fluence for 16 ns ablation of PMMA, and the surface morphology is improved, also for several other materials.
Küper, S., Stuke, M.
openaire   +2 more sources

Surface Properties of Femtosecond Laser Ablated PMMA

ACS Applied Materials & Interfaces, 2010
The effects of femtosecond laser ablation on the physical and chemical properties at the surface of poly methylmethacrylate (PMMA) were studied. Femtosecond laser microfabrication caused the initially wetting behavior of PMMA to become nonwetting, mainly because of the laser-induced surface porosity at the submicroscale.
DE MARCO, CARMELA, S. M. Eaton, SURIANO, RAFFAELLA, TURRI, STEFANO, LEVI, MARINELLA, RAMPONI, ROBERTA, CERULLO, GIULIO NICOLA, R. Osellame   +7 more
openaire   +5 more sources