Results 71 to 80 of about 54,913 (297)

A Quest for the Mechanism of Ultrahigh Resolution SEM Imaging

Advanced Science, EarlyView.
Using Monte Carlo simulations with explicit definitions of SE1 and SE2 align with a cascade secondary electron production model, this work shows that the 3D nanostructure modulated SE2 emission enhances other than to reduce topographical contrast via a “miniature Faraday cup” effect.
Hao Tian Chen, Y.B. Zou, B. Da, Z.J. Ding   +3 more
wiley   +1 more source

Positron annihilation induced Auger electron spectroscopy [PDF]

Recently, Weiss et al. have demonstrated that it is possible to excite Auger transitions by annihilating core electrons using a low energy (less than 30eV) beam of positrons.
Jensen, K. O., Koymen, A. R., Lee, K. H., Lei, Chun, Mehl, David, Weiss, Alex   +5 more
core   +1 more source

Measurement of phosphorus segregation in silicon at the atomic-scale using STM

, 2003
In order to fabricate precise atomic-scale devices in silicon using a combination of scanning tunnelling microscopy (STM) and molecular beam epitaxy it is necessary to minimize the segregation/diffusion of dopant atoms during silicon encapsulation.
Bilger, Gerhard, Clark, Robert G., Curson, Neil J., Hallam, Toby, Oberbeck, Lars, Simmons, Michelle Y.   +5 more
core   +1 more source

Unraveling Band‐Tail Effects on Temperature‐Dependent Emission in GaAsBi via Photoluminescence

Advanced Science, EarlyView.
An innovative dual‐spectroscopy approach resolves the debate over GaAsBi's emission temperature sensitivity. By combining temperature‐dependent photoluminescence and transmission spectroscopy, the method decouples the contributions of band‐tail states from the intrinsic band‐edge behavior.
Bing Yan, Xiren Chen, Liangqing Zhu, Lijuan Wang, Man Wang, Shumin Wang, Jun Shao   +6 more
wiley   +1 more source

In Situ Construction of Cu1+/Cu0 and Cu2+/Cu0 Pairs of Cu‐Based Catalysts for Electrocatalytic Nitrate Reduction

Advanced Science, EarlyView.
CuO and CuPO (Cu2P2O7 and Cu3(PO4)2) as precursors are in suit construction two distinct copper‐based active sites during the NO3RR reaction: Cu1+/Cu0 (derived from CuO) and Cu2+/Cu0 (derived from CuPO). Cu1+/Cu0 is the key to achieving high activity and high selectivity.
Shanna An, Jiali Ren, Yanjun Xue, Jian Tian   +3 more
wiley   +1 more source

Characterization study of polycrystalline tin oxide surfaces before and after reduction in CO [PDF]

Polycrystalline tin oxide surfaces have been examined before and after reduction in 40 Torr of CO at 100 and 175 C using Auger electron spectroscopy (AES), electron spectroscopy for chemical analysis (ESCA), ion scattering spectroscopy (ISS) and electron
Davidson, Mark R., Drawdy, Jean E., Hoflund, Gar B., Schryer, David R.   +3 more
core   +1 more source

Cherenkov Flashes and Fluorescence Flares on Telescopes: New lights on UHECR Spectroscopy while unveiling Neutrinos Astronomy

, 2007
Cherenkov Telescopes (as Magic, Hess and Veritas), while pointing horizontally should reveal also the fluorescence flare tails of nearby down-going air-showers.
Aramo, Bertou, D. Fargion, F. Massa, Fargion, Fargion, Fargion, Fargion, Fargion, Fargion, Fargion, Fargion, Fargion, G. Moreno, Greisen, Miele, P. Oliva, Zas, Zatsepin   +18 more
core   +1 more source

Mitigating Electrochemical Isolation in Ni‐Rich Layered Cathodes for Durable Solid‐State Batteries

Advanced Science, EarlyView.
Electrochemical isolation of Ni‐rich layered cathodes in sulfide solid‐state batteries is uncovered as a previously unrecognized but critical performance‐limiting pathway. This study elucidates its origin and impact and introduces a scalable mitigation strategy using oxygen‐functionalized conductive carbon.
Abhirup Bhadra, Maxime Brunisholz, Aditya Rawal, Jacob Otabil Bonsu, Tongjun Luo, Lars Thomsen, Wesley M. Dose, Dipan Kundu   +7 more
wiley   +1 more source

Development of the web-based NIST X-ray Photoelectron Spectroscopy (XPS) Database

Data Science Journal, 2006
The first Web-based version of the NIST X-ray Photoelectron Spectroscopy Database (XPSDB) is described. The current database, built from a relational database management system (RDBMS), contains critically evaluated data with over 19,000 line positions ...
Angela Y Lee, Dorothy M Blakeslee, Cedric J Powell, John R Rumble, Jr   +3 more
doaj   +1 more source

Carrier relaxation mechanisms in self-assembled (In,Ga)As/GaAs quantum dots: Efficient P -> S Auger relaxation of electrons

, 2006
We calculate the P-shell--to-S-shell decay lifetime \tau(P->S) of electrons in lens-shaped self-assembled (In,Ga)As/GaAs dots due to Auger electron-hole scattering within an atomistic pseudopotential-based approach. We find that this relaxation mechanism
Al. L. Efros, Alex Zunger, E. A. Zibik, E. A. Zibik, Gabriel Bester, Gustavo A. Narvaez, H. Jiang, Landolt-Börnstein, P. Guyot-Sionnest   +8 more
core   +1 more source