Results 81 to 90 of about 31,828 (175)

Nanoscale tomography reveals the deactivation of automotive copper-exchanged zeolite catalysts

Nature Communications, 2017
Cu-exchanged zeolite chabazite has superior stability over other catalysts in automotive NOx reduction. Here, the authors use atom probe tomography to create 3D nanoscale reconstructions of two Cu-containing zeolite catalysts, providing a complete ...
Joel E. Schmidt, Ramon Oord, Wei Guo, Jonathan D. Poplawsky, Bert M. Weckhuysen   +4 more
doaj   +1 more source

Entanglement-enhanced probing of a delicate material system

, 2012
Quantum metrology uses entanglement and other quantum effects to improve the sensitivity of demanding measurements. Probing of delicate systems demands high sensitivity from limited probe energy and has motivated the field's key benchmark-the standard ...
A Cerè, AE Lita, B Julsgaard, BJ Smith, BM Escher, C-S Chuu, CE Kuklewicz, Chiara Vitelli, D Leibfried, F Wolfgramm, F Wolfgramm, F Wolfgramm, F Wolfgramm, Federica A. Beduini, Florian Wolfgramm, H Vahlbruch, I Afek, I Afek, JCF Matthews, K Banaszek, K Eckert, LB Madsen, M Auzinsh, M Kacprowicz, M Koschorreck, M Napolitano, M Pototschnig, MH Schleier-Smith, MK Tey, Morgan W. Mitchell, MW Mitchell, N Thomas-Peter, Nicolas Godbout, PM Carlton, RA Fisher, RBA Adamson, SL Braunstein, U Dorner, V Giovannetti, V Shah   +39 more
core   +1 more source

Atom Probe Tomography Of Interfaces

Microscopy and Microanalysis, 1999
Abstract The technique of atom probe tomography (APT) enables the x, y, and z coordinates and the elemental identities of the atoms in a small volume to be determined at the atomic level. Therefore, the APT technique may be used to characterize solute segregation to interfaces and precipitation in terms of concentration gradients and ...
openaire   +1 more source

A Streaming Multi-GPU Implementation of Image Simulation Algorithms for Scanning Transmission Electron Microscopy

, 2017
Simulation of atomic resolution image formation in scanning transmission electron microscopy can require significant computation times using traditional methods.
Miao, Jianwei, Ophus, Colin, Pryor Jr., Alan   +2 more
core   +2 more sources

Deformation behavior of aluminum pillars produced by Xe and Ga focused ion beams: Insights from strain rate jump tests

Materials & Design, 2019
Micro-compression testing of focused ion beam fabricated pillars is a popular technique for mechanical characterization at small scales. However, there are concerns associated with these ion-prepared samples, including irradiation damage from Ga ions and
Y. Xiao, V. Maier-Kiener, J. Michler, R. Spolenak, J.M. Wheeler   +4 more
doaj   +1 more source

Atomic defects and dopants in ternary Z-phase transition-metal nitrides CrMN with M=V, Nb, Ta investigated with density functional theory

, 2017
A density functional theory study of atomic defects and dopants in ternary Z-phase transition-metal nitrides CrMN with M=V, Nb, or Ta is presented. Various defect formation energies of native point defects and of substitutional atoms of other metal ...
Elsässer, Christian, Urban, Daniel F.
core   +1 more source

γʹ and γ″ co-precipitation phenomena in directly aged Alloy 718 with high δ-phase fractions

Materials & Design
Co-precipitation of γ′ and γ′′ is the main strengthening mechanism that provides superior high-temperature strength in directly aged Alloy 718 aerospace parts.
Vitor V. Rielli, Ehsan Farabi, Flora Godor, Christian Gruber, Aleksandar Stanojevic, Bernd Oberwinkler, Sophie Primig   +6 more
doaj   +1 more source

Full tip imaging in atom probe tomography

Ultramicroscopy, 2013
Atom probe tomography (APT) is capable of simultaneously revealing the chemical identities and three dimensional positions of individual atoms within a needle-shaped specimen, but suffers from a limited field-of-view (FOV), i.e., only the core of the specimen is effectively detected.
Du, S., Burgess, Timothy, Loi, Shyeh Tjing, Gault, B., Gao, Qiang, Bao, Peite, Li, Li, Cui, Xiangyuan, Yeoh, Wai Kong, Jagadish, Chennupati, Ringer, Simon Peter, Zheng, Rongkun, Tan, Hark Hoe   +12 more
openaire   +3 more sources

Directions in Atom Probe Tomography [PDF]

Microscopy and Microanalysis, 2021
David Larson, Dan Lenz, Isabelle Martin, Ty Prosa, David Reinhard, Peter Clifton, Brian Geiser, Robert Ulfig, Joe Bunton   +8 more
openaire   +1 more source

Atom Probe Tomography: A Tutorial

Microscopy and Microanalysis, 2000
Abstract Atom probe tomography (APT) is an ultrahigh resolution microanalytical technique that enables the spatial coordinates and elemental identities of the atoms in a small volume of material to be determined. The specimen volume that may be analyzed is typically ∼ 10 to 20 nm square by ∼ 100 to 250 nm deep, and contains up to ∼ 1 ...
openaire   +1 more source