Results 71 to 80 of about 187,216 (261)

Atomic-level handedness determination of chiral crystals using aberration-corrected scanning transmission electron microscopy

Nature Communications, 2020
Handedness or chirality determination of crystals has always been challenging for chemists, biologists and materials scientists. Here, the authors report a method for handedness determination by atomic-resolution imaging using Cs-corrected scanning ...
Zhuoya Dong, Yanhang Ma
doaj   +1 more source

Triple Junctions as Dislocation‐Like Defects: The Role of Grain Boundary Crystallography Revealed by Experiment and Atomistic Simulation

Advanced Engineering Materials, EarlyView.
Grain boundary triple junctions are an essential ingredient of the microstructure of polycrystalline materials. In this study, a triple junction is observed using atomic‐resolution scanning transmission electron microscopy and characterized. Computer simulations reveal that the junction has a dislocation character that is determined by the joining ...
Tobias Brink, Saba Saood, Peter Schweizer, Jörg Neugebauer, Gerhard Dehm   +4 more
wiley   +1 more source

COVID-19-Associated Rhino-Orbital Mucormycosis: Histological and Electron Microscopy Characteristics

Diagnostics
COVID-19-associated rhino-orbital mucormycosis has become a new clinical entity. This study’s aim was to evaluate the histopathological and ultramicroscopic morphological aspects of this fungal infection.
Ionuț Isaia Jeican, Delia Ioana Horhat, Mihai Dumitru, Adrian Florea, Lucian Barbu-Tudoran, Bogdan-Alexandru Gheban, Vlad Anton, Corneliu Toader, Maria Aluaș, Costel Vasile Siserman, Nicolae Balica, Daniela Vrînceanu, Silviu Albu   +12 more
doaj   +1 more source

Reliable strain measurement in transistor arrays by robust scanning transmission electron microscopy

AIP Advances, 2013
Accurate measurement of the strain field in the channels of transistor arrays is critical for strain engineering in modern electronic devices. We applied atomic-resolution high-angle annular dark-field scanning transmission electron microscopy to ...
Suhyun Kim, Joong Jung Kim, Younheum Jung, Kyungwoo Lee, Gwangsun Byun, KyoungHwan Hwang, Sunyoung Lee, Kyupil Lee   +7 more
doaj   +1 more source

Advanced Electron Microscopy and Microcomputed Tomography Analysis of Single‐Crystal Ni‐Base Superalloys After Short‐Term Multiaxial Creep

Advanced Engineering Materials, EarlyView.
This work studies the anisotropic behavior of circular notched tensile specimens of Ni‐base superalloy single crystals during high‐temperature tensile creep along [001], [110], and [111]. Correlative scale‐bridging imaging of specimens reveals early rupture along [110] because 1) plastic deformation proceeds faster at notch center; 2) more (brittle ...
Leonardo Agudo Jácome, Lijie Cao, Christoph Somsen, Johannes Boes, René Hesse, Werner Theisen, Gunther Eggeler   +6 more
wiley   +1 more source

Morphological and morphometrical assessment of spermathecae of Aedes aegypti females

Memorias do Instituto Oswaldo Cruz, 2012
The vectorial capacity of Aedes aegypti is directly influenced by its high reproductive output. Nevertheless, females are restricted to a single mating event, sufficient to acquire enough sperm to fertilize a lifetime supply of eggs. How Ae.
Tales Vicari Pascini, Marcelo Ramalho-Ortigão, Gustavo Ferreira Martins   +2 more
doaj   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

On the Effect of Creep on Local Lattice Orientation in Single‐Crystal Ni‐Based Superalloy Microstructures

Advanced Engineering Materials, EarlyView.
During creep of a single‐crystal Ni‐based superalloy, the overall crystal orientation is observed to remain constant while the microstructure evolves. Despite the lack of macroscopic rotation, small (<1°) rotations are observed on the submicron size scale and are accommodated by counteracting rotations over the scale of several micrometers.
E. J. Payton, E. B. Dursun, G. Eggeler, L. Agudo Jácome   +3 more
wiley   +1 more source

AFM, ESEM, TEM, and CLSM in liposomal characterization: a comparative study

International Journal of Nanomedicine, 2011
Barbara Ruozi1, Daniela Belletti1, Andrea Tombesi2, Giovanni Tosi1, Lucia Bondioli1, Flavio Forni1, Maria Angela Vandelli11Department of Pharmaceutical Sciences, University of Modena and Reggio Emilia, Modena, Italy; 2C.I.G.S., University of Modena and ...
Barbara Ruozi, Daniela Belletti, Andrea Tombesi, et al   +3 more
doaj  

Uniform Amorphization of Crystalline Silicon Surfaces Enabled by Deep Ultraviolet Femtosecond Laser Pulses

Advanced Engineering Materials, EarlyView.
Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali, Magali Gregoire, Matys Guyard, Tatiana Itina, David Grojo, Pol Sopeña   +5 more
wiley   +1 more source