Results 91 to 100 of about 70,853 (271)

Ferromagnetism of cobalt-doped anatase TiO$_2$ studied by bulk- and surface-sensitive soft x-ray magnetic circular dichroism

, 2012
We have studied magnetism in anatase Ti$_{1-x}$Co$_x$O$_{2-\delta}$ ({\it x} = 0.05) thin films with various electron carrier densities, by soft x-ray magnetic circular dichroism (XMCD) measurements at the Co $L_{2,3}$ absorption edges.
Chang, F. -H., Chen, C. T., Fujimori, A., Fukumura, T., Huang, D. -J., Ishigami, K., Kataoka, T., Kawasaki, M., Lin, H. -J., Shibata, G., Singh, V. R., Verma, V. K., Yamada, Y., Yamazaki, Y.   +13 more
core   +1 more source

An investigation into the effect of thickness of titanium dioxide and gold-silver nanoparticle titanium dioxide composite thin-films on photocatalytic activity and photo-induced oxygen production in a sacrificial system [PDF]

, 2011
Thin films of titanium dioxide and titanium dioxide with incorporated gold and silver nanoparticles were deposited onto glass microscope slides, steel and titanium foil coupons by two sol–gel dip-coating methods.
Darr, J. A., Hyett, G., Kafizas, A., Kundu, S., Mills, A., Parkin, I. P.   +5 more
core   +1 more source

From Materials to Systems: Challenges and Solutions for Fast‐Charge/Discharge Na‐Ion Batteries

Advanced Energy Materials, EarlyView.
This review systematically analyzes the key characteristics limiting the fast‐charge/discharge capability of Na‐ion batteries (SIBs) from a multi‐scale perspective encompassing electrode materials, the electrode‐electrolyte interface, and the system. Furthermore, it presents practical solution strategies for the fundamental issues arising at each scale,
Bonyoung Ku, Sangbin Park, Sunha Hwang, Sunghyun Lim, Won‐Sub Yoon, Jongsoon Kim   +5 more
wiley   +1 more source

DSSC Anchoring Groups: A Surface Dependent Decision [PDF]

, 2014
Electrodes in dye sensitised solar cells (DSSCs) are typically nanocrystalline anatase TiO2 with a majority (101) surface exposed. Generally the sensitising dye employs a carboxylic anchoring moiety through which it adheres to the TiO2 surface.
Bowler, David R., O'Rourke, Conn
core   +2 more sources

Peripherally Fluorinated Tetraphenylethene: New Electron Extraction Interlayers for n‐i‐p Perovskite Solar Cells

Advanced Energy Materials, EarlyView.
Fluorinated tetraphenylethene (TPE) derivatives were developed as interfacial layers for perovskite solar cells. The optimized TFP‐TPE enhances interfacial compatibility, suppresses molecular aggregation, and improves charge extraction. Devices incorporating TFP‐TPE achieved a record efficiency of 25.29% and outstanding stability under humidity and ...
Xiao‐Xin Gao, Ezhumalai Yamuna, Liang‐Wei Lin, Roland C. Turnell‐Ritson, Shuqing Song, Wen Luo, Chenxu Zhao, Shao‐Huan Hong, Cheng‐Liang Liu, Shiyu Xing, Jun Shao, Paul J. Dyson, Ming‐Chou Chen, Mohammad Khaja Nazeeruddin   +13 more
wiley   +1 more source

Stability and Electronic Properties of TiO2 Nanostructures With and Without B and N Doping [PDF]

, 2009
We address one of the main challenges to TiO2-photocatalysis, namely band gap narrowing, by combining nanostructural changes with doping. With this aim we compare TiO2's electronic properties for small 0D clusters, 1D nanorods and nanotubes, 2D layers ...
Angelis F. D., Asahi R., Bahn S. R., Bavykin D. V., Cai Z.-L., Chen Y., Enyashin A. N., Gai Y., Ghicov A., Gonze X., Graciani J., Grätzel M., Hammer B., Hardmand P. J., Heller A., Hoffmann M. R., Imai H., In S., Kasuga T., Khan S. U. M., Khaselev O., Labat F., Lide D., Liu G., Marini A., Marques M., Mogilevsky G., Muscat J., Nambu A., Qu Z.-W., Salzner U., Thulin L., Valentin C. D., Zhai H.-J.   +33 more
core   +1 more source

Degradation Mechanisms of Rutile‐Type TiO2 Photoanodes during Photoelectrochemical Water Splitting

Advanced Energy Materials, EarlyView.
Combining operando dissolution measurements with microscopy and spectroscopy characterizations, we reveal different degradation mechanisms of rutile‐type TiO2 photoanodes during photoelectrochemical water splitting. In acidic electrolytes, degradation is inhibited once TiO2 reaches saturation.
Yiqun Jiang, Raquel Aymerich‐Armengol, Ilias Efthimiopoulos, Martin Rabe, Andrea M. Mingers, Ningyan Cheng, Benjamin Breitbach, Saswati Santra, Verena Streibel, Ian D. Sharp, Lilian Vogl, Christina Scheu, Siyuan Zhang   +12 more
wiley   +1 more source

One-Step Magneton Sputtering of Crystalline Cu-Doped TiO₂ Coatings: Characterization and Antibacterial Activity

Applied Sciences
Early biofilm formation could be inhibited by applying a thin biocompatible copper coating to reduce periprosthetic infections. In this study, we deposited crystalline Cu-doped TiO2 films using one-step DC magnetron sputtering in an oxygen atmosphere on ...
Maria P. Nikolova, Sadegh Yousefi, Yordan Handzhiyski, Margarita D. Apostolova   +3 more
doaj   +1 more source

Glancing Angle Deposition Effect on Structure and Light-Induced Wettability of RF-Sputtered TiO2 Thin Films

Micromachines, 2018
Crystalline TiO2 films were prepared on unheated glass substrates by radio frequency (RF) reactive magnetron sputtering at normal angle of incidence (a = 0°) and at glancing angle (a = 87°).
Vasiliki E. Vrakatseli, Alexandros N. Kalarakis, Angelos G. Kalampounias, Eleftherios K. Amanatides, Dimitrios S. Mataras   +4 more
doaj   +1 more source

Appearance of room temperature ferromagnetism in Cu-doped TiO$_{2-\delta}$ films

, 2007
In recent years there has been an intense search for room temperature ferromagnetism in doped dilute semiconductors, which have many potentially applications in spintronics and optoelectronics.
A. F. Cabrera, C. Chiliotte, C. E. Rodríguez Torres, F. Golmar, F. H. Sánchez, L. A. Errico, M. F. Vignolo, M. Rentería, M. Weissmann, P. Blaha, P. Sharma, S. Duhalde   +11 more
core   +1 more source