Results 61 to 70 of about 19,320 (212)

Insights into the Structure of Dot@Rod and Dot@Octapod CdSe@CdS Heterostructures [PDF]

, 2015
CdSe@CdS dot@rods with diameter around 6 nm and length of either 20, 27, or 30 nm and dot@octapods with pod diameters of ?15 nm and lengths of ?50 nm were investigated by X-ray absorption spectroscopy.
Anna Corrias, Diego Gianolio, Erika Conca, Francesco De Donato, Gavin Mountjoy, Giannantonio Cibin, Klug H. P., Koninbsberger D. C., Kudera S., Liberato Manna, Maria Francesca Casula   +10 more
core   +2 more sources

Silver‐Alloyed Wide‐Bandgap (Ag,Cu)(In,Ga)S2 Thin‐Film Solar Cells With 15.5% Efficiency

Progress in Photovoltaics: Research and Applications, EarlyView.
This study reports improvements in compositional homogeneity, microstructure, enhanced radiative recombination, and extended carrier lifetime of CIGS absorber via Ag incorporation. The optimal Ag‐alloyed CIGS solar cells achieve 15.5% PCE and 948 mV VOC, competing with the VOC of the Ag‐free reference sample from the same batch.
Yucheng Hu, Ece Washbrook, Arivazhagan Valluvar Oli, Andrea Griesi, Yurii P. Ivanov, Mariam Pelling, Simon M. Fairclough, Kulwinder Kaur, Michele Melchiorre, Adam Hultqvist, Tobias Törndahl, Wolfram Hempel, Wolfram Witte, Giorgio Divitini, Susanne Siebentritt, Rachel A. Oliver, Gunnar Kusch   +16 more
wiley   +1 more source

Trace element signatures of sphalerite in the Sichuan Daliangzi Ge-rich Pb-Zn deposit and its implications for deep ore prospecting

Frontiers in Earth Science, 2022
The Daliangzi Pb-Zn deposit is one of the typical Ge-rich Pb-Zn deposits in the Sichuan-Yunnan-Guizhou Pb-Zn polymetallic metallogenic triangle area (SYGT), with its Pb, Zn, and Cd reserves reaching the scale of a large-sized deposit and its Ge reserve ...
Lingjie Li, Runsheng Han, Yan Zhang, Jianbiao Wu, Zhixing Feng   +4 more
doaj   +1 more source

Copper mineral occurrences in the Wrangell Mountains-Prince William Sound area, Alaska [PDF]

, 1971
On January 9, 1970, the U.S. Bureau of Mines entered into an agreement with the University of Alaska based upon a proposal submitted by the Mineral Industry Research Laboratory.
Grybeck, D.G., Heiner, L.E., Wolff, E.N.
core  

Gallium Nitride‐Based Electrode Materials for Supercapacitors: From Wide Band Semiconductor to Energy Storage Platform

Small, EarlyView.
This review focuses on capability of Gallium Nitride (GaN)‐based supercapacitors, bordering the advancement from porous architecture to novel hybrid nanostructures. It systematically investigates synthesis approaches and charge storage mechanisms that generate remarkable energy densities and competent cyclic stability.
Farasat Haider, Batool Esmat, Ali Raza Kashif, Muhammad Shahid Khan, Akif Safeen, Basit Ali Khan, Karim Khan, Basit Ali   +7 more
wiley   +1 more source

Selective Oxidation Depression of Copper-Activated Sphalerite by H₂O₂ During Chalcopyrite Flotation

Metals
Using hydrogen peroxide (H2O2), a simple and easily accessible reagent, as a selective depressant, flotation separation experiments of chalcopyrite and copper-activated sphalerite were conducted.
Peiqiang Fan, Xiong Tong, Xian Xie, Qiang Song, Yuanlin Ma, Bin Han, Haitao Fu, Zhiming Lu   +7 more
doaj   +1 more source

New Magnetite Reference Material for SIMS δ18O Measurements and a Study of Precision and Accuracy Due to Crystal Orientation Effects

Geostandards and Geoanalytical Research, EarlyView.
Key Points A new magnetite reference material (PF21mt) is available for δ18O measurements by SIMS. Reproducibility of measurement results in two laboratories suggest orientation bias of ±2‰ (2s) at 20 keV. Repeatability improves to ±1‰ (2s) when using a 13 keV protocol, suggesting reduced orientation bias. In situ isotope ratio measurements provide the
Michelle Ulrich, Daniela Rubatto, Maria Rosa Scicchitano, Benita Putlitz, Thomas Bovay   +4 more
wiley   +1 more source

Ferric chloride leaching of the Delta sulfide ores and gold extraction from the leaching residue [PDF]

, 1988
Conventional differential and bulk flotation processes have difficulties in achieving high recoveries with acceptable grades far zinc, lead and copper from the complex sulfide ores found at Tok, Alaska.
Lin, H.K., Rao, P.D.
core  

Comparison of different X‐ray‐based scanning electron microscopy methods to detect sub‐nanometre ultra‐thin InAs layers deposited on top of GaAs

Journal of Microscopy, EarlyView.
Abstract We compare three different methods of X‐ray analysis in a scanning electron microscope (SEM): energy‐dispersive X‐ray spectroscopy (EDX), wavelength‐dispersive X‐ray spectroscopy (WDX) and micro X‐ray fluorescence (μXRF). These methods are all applied to the same gallium arsenide (GaAs) wafer with a 0.8 nm layer of indium arsenide (InAs) on ...
Thomas Walther, Stuart Creasey‐Gray, Stephan Boehm, Heath Young, Yang Yang   +4 more
wiley   +1 more source

Determining bismuth content in GaAsBi alloys by energy‐dispersive X‐ray spectroscopy: A case study with multiple sets of k*‐factors for analytical transmission electron microscopy

Journal of Microscopy, EarlyView.
Abstract Measuring the bismuth (Bi) content of ternary gallium arsenide bismuthide (GaAsBi) alloys is important because it sensitively influences their bandgap, and Bi is known to segregate vertically to the surface and sometimes also laterally during growth, so elemental distribution maps need to be quantified.
T. Walther
wiley   +1 more source