Results 61 to 70 of about 41,858 (234)

Catalytic Activity of Cobalt Ferrites in Water Oxidation Reactions and Its Defect Dependency

ChemCatChem, EarlyView.
Cobalt ferrite spinels calcined at 400–600 °C show temperature‐dependent changes in crystallinity, particle size, and defect concentration. A combination of PXRD, BET, SEM, Mössbauer spectroscopy, magnetometry, and PALS reveals how defect landscapes govern opposing trends in chemical versus electrochemical water oxidation.
Anna Rabe, Ahmed Gamal Attallah, Benedikt Eggert, Eric Hirschmann, Soma Salamon, Joachim Landers, Lea Kämmerer, Nicolas Cosanne, Adarsh Koul, Eko Budiyanto, Wolfgang Schuhmann, Malte Behrens, Heiko Wende   +12 more
wiley   +1 more source

Microstructure and luminescent properties of Eu3+-activated MgGa2O4:Mn2+ ceramic phosphors

Journal of Advanced Ceramics, 2020
Mn2+ and the trivalent europium (Eu3+)-doped MgGa2O4 ceramics are characterized using a multi-experimental approach. The formation of spinel-structured ceramics is ascertained from X-ray diffraction (XRD) analysis.
A. Luchechko, Y. Shpotyuk, O. Kravets, O. Zaremba, K. Szmuc, J. Cebulski, A. Ingram, R. Golovchak, O. Shpotyuk   +8 more
doaj   +1 more source

PALS investigations of free volumes thermal expansion of J-PET plastic scintillator synthesized in polystyrene matrix [PDF]

, 2015
The polystyrene dopped with 2,5-diphenyloxazole as a primary fluor and 2-(4-styrylphenyl)benzoxazole as a wavelength shifter, prepared as a plastic scintillator was investigated using positronium probe in wide range of temperatures from 123 to 423 K ...
Bednarski, T., Białas, P., Czerwiński, E., Gajos, A., Gorgol, M., Jasińska, B., Kamińska, D., Kapłon, Ł., Kochanowski, A., Korcyl, G., Kowalski, P., Kozik, T., Krzemień, W., Kubicz, E., Moskal, P., Niedźwiecki, S., Pałka, M., Raczyński, L., Rudy, Z., Rundel, O., Sharma, N. G., Silarski, M., Strzelecki, A., Słomski, A., Wieczorek, A., Wiślicki, W., Zgardzińska, B., Zieliński, M.   +27 more
core   +2 more sources

Vacancy‐Type Defects in n‐Type GaN Fabricated by Low‐Dose Ion Implantation Studied by a Monoenergetic Positron Beam

physica status solidi (b), EarlyView.
Vacancies in low‐dose ion‐implanted GaN are studied by positron annihilation. Depth profiles of the net donor concentration (ND) are close to those for implanted impurities, but ND is 2–3 times higher than concentrations of implanted ions. The origin of donor‐like defects is expected to be N‐vacancy‐related defects, and Ga‐vacancy‐type defects play a ...
Akira Uedono, Hiroko Iguchi, Masahiro Horita, Jun Suda, Kohei Shima, Shigefusa F. Chichibu, Shoji Ishibashi   +6 more
wiley   +1 more source

Study the structure of nanodiamonds by electron-positron annihilation after adding a certain amount of cyclic hydrogen [PDF]

, 2017
Nanodiamond samples with various densities were studied by positron annihilation spectroscopy with the aim of finding out the hydrogen saturation effect on nanodiamonds.
Гулидова, Людмила Владимировна, Лю Чао   +1 more
core  

Emerging applications of rare‐earth fluoride nanocrystals in medicine and biotechnologies

Responsive Materials, EarlyView.
Rare‐earth fluoride nanocrystals (REFNCs) exhibit high responsivity and can be used as multi‐modal agents in medicine and theranostics. This review summarizes recent advances in REFNCs, covering their synthesis, structures, luminescent properties, and applications in multi‐modal imaging and photodynamic therapy, highlighting their theranostic potential
Alain Tressaud, Zhichao Wang, Yuqi Tang, Quan Li   +3 more
wiley   +1 more source

Detection of atomic scale changes in the free volume void size of three-dimensional colorectal cancer cell culture using positron annihilation lifetime spectroscopy. [PDF]

PLoS ONE, 2014
Positron annihilation lifetime spectroscopy (PALS) provides a direct measurement of the free volume void sizes in polymers and biological systems. This free volume is critical in explaining and understanding physical and mechanical properties of polymers.
Eneko Axpe, Tamara Lopez-Euba, Ainara Castellanos-Rubio, David Merida, Jose Angel Garcia, Leticia Plaza-Izurieta, Nora Fernandez-Jimenez, Fernando Plazaola, Jose Ramon Bilbao   +8 more
doaj   +1 more source

The sky distribution of 511 keV positron annihilation line emission as measured with INTEGRAL/SPI [PDF]

, 2007
The imaging spectrometer SPI on board ESA's INTEGRAL observatory provides us with an unprecedented view of positron annihilation in our Galaxy. The first sky maps in the 511 keV annihilation line and in the positronium continuum from SPI showed a ...
A. Strong, B. Cordier, B. J. Teegarden, Ch. Winkler, G. K. Skinner, G. Vedrenne, G. Weidenspointner, J. -p. Roques, J. Knödlseder, P. Jean, P. Milne, P. Von Ballmoos, R. Diehl, S. Schanne   +13 more
core   +2 more sources

The plasticisation model of dye diffusion: Part 5

Coloration Technology, EarlyView.
Abstract The findings presented in the previous part of the paper (Part 4) of the re‐evaluation of previously published data reported for the temperature‐dependent diffusion of an organic acid within nylon 6 film, desorption of three acid dyes from dyed nylon 66 fabric, diffusion of an acid dye within nylon 6 monofilaments and adsorption of a sulphur ...
Stephen M. Burkinshaw
wiley   +1 more source

Positron Annihilation Spectroscopy in Material studies

, 2019
Positron annihilation spectroscopy (PAS) is a method dedicated to detection of openvolume type of defects. Nowadays, this technique is of a great interest due to the practical character of obtained results.
P. Horodek, L. Khiem, K. Siemek, L. A. Tuyen, A. Kobets   +4 more
semanticscholar   +1 more source