Results 1 to 10 of about 800,630 (271)

Transmission electron microscopy of pili annulati [PDF]

Anais Brasileiros de Dermatologia, 2022
Background: Little is known about the ultrastructure of pili annulati. Objectives: To examine with transmission electron microscopy affected hairs of a family, whose diagnosis had been confirmed in five individuals with scanning electron microscopy ...
Joice Brião Göebel Pinto, Hiram Larangeira de Almeida Jr., Antônia Larangeira de Almeida, Pedro de Oliveira Firpo   +3 more
doaj   +4 more sources

Evaluation of threshold conditions for latent track formation in nanocrystalline Y2Ti2O7

Eurasian Journal of Physics and Functional Materials, 2022
We present the first report on the structural effects induced by swift xenon ions in nanocrystalline pyrochlore Y2Ti2O7 (outside the metal matrix) studied using high resolution transmission electron microscopy.
A. Ibrayeva, A. Mutali, J. O’Connell, A. Sohatsky, V. Skuratov, L. Alekseeva, E. Korneeva, R. Rymzhanov   +7 more
doaj   +1 more source

Liquid cell transmission electron microscopy and its applications [PDF]

Royal Society Open Science, 2020
Transmission electron microscopy (TEM) has long been an essential tool for understanding the structure of materials. Over the past couple of decades, this venerable technique has undergone a number of revolutions, such as the development of aberration ...
Shengda Pu, Chen Gong, Alex W. Robertson   +2 more
doaj   +1 more source

Improvement of structural quality of AlN layers grown on c-plane sapphire substrate by metal–organic vapor phase epitaxy using post-growth annealing with trimethylgallium

AIP Advances, 2022
AlN layers were grown on a c-plane sapphire substrate by metal–organic vapor phase epitaxy (MOVPE) at 1350 °C. The structural quality of the grown AlN layers was drastically improved by post-growth annealing in mixed hydrogen, ammonia, and ...
Masataka Imura, Hideki Inaba, Takaaki Mano, Nobuyuki Ishida, Fumihiko Uesugi, Yoko Kuroda, Yoshiko Nakayama, Masaki Takeguchi, Yasuo Koide   +8 more
doaj   +1 more source

Coexisting multi-states in catalytic hydrogen oxidation on rhodium

Nature Communications, 2021
Catalytic reactions may exhibit oscillations in the reaction rate even at constant external parameters. Here, the authors observe and explain the coexistence of such oscillations and the steady states of catalytic activity in H2 oxidation on differently ...
P. Winkler, J. Zeininger, M. Raab, Y. Suchorski, A. Steiger-Thirsfeld, M. Stöger-Pollach, M. Amati, L. Gregoratti, H. Grönbeck, G. Rupprechter   +9 more
doaj   +1 more source

Understanding electrochemical switchability of perovskite-type exsolution catalysts

Nature Communications, 2020
Exsolution, nanoparticle precipitation from oxide materials during reduction, offers a promising approach to heterogeneous catalysis. Here, authors examine the switching behavior between high and low activity and correlate the electro-catalytic activity ...
Alexander K. Opitz, Andreas Nenning, Vedran Vonk, Sergey Volkov, Florian Bertram, Harald Summerer, Sabine Schwarz, Andreas Steiger-Thirsfeld, Johannes Bernardi, Andreas Stierle, Jürgen Fleig   +10 more
doaj   +1 more source

How the anisotropy of surface oxide formation influences the transient activity of a surface reaction

Nature Communications, 2021
Surface oxide formation under reaction conditions may change the catalytic activity of a catalyst. Here, the authors explore the effect of atomic structure of Rh surfaces on the surface oxide formation and its influence on catalytic activity in hydrogen ...
P. Winkler, J. Zeininger, Y. Suchorski, M. Stöger-Pollach, P. Zeller, M. Amati, L. Gregoratti, G. Rupprechter   +7 more
doaj   +1 more source

Stability and activity of platinum nanoparticles in the oxygen electroreduction reaction: is size or uniformity of primary importance?

Beilstein Journal of Nanotechnology, 2021
Platinum–carbon catalysts are widely used in the manufacturing of proton-exchange membrane fuel cells. Increasing Pt/C activity and stability is an urgent task and the optimization of their structure seems to be one of the possible solutions.
Kirill O. Paperzh, Anastasia A. Alekseenko, Vadim A. Volochaev, Ilya V. Pankov, Olga A. Safronenko, Vladimir E. Guterman   +5 more
doaj   +1 more source

3D characterization of CdSe nanoparticles attached to carbon nanotubes [PDF]

, 2008
The crystallographic structure of CdSe nanoparticles attached to carbon nanotubes has been elucidated by means of high resolution transmission electron microscopy and high angle annular dark field scanning transmission electron microscopy tomography ...
A. B. F. Martinson, A. J. Nozik, A. W. Stevenson, Ana B. Hungría, B. H. Juarez, B. Q. Sun, Beatriz H. Juárez, C. B. Murray, Christian Klinke, D. J. Milliron, D. V. Talapin, D. V. Talapin, H. Lee, Horst Weller, I. Robel, J. C. Hernandez, J. J. Cha, J. Joo, J. Park, L. H. Qu, L. Manna, L. Manna, L. Sheeney-Haj-Khia, M. A. Anderson, M. A. Hines, M. Casavola, O. Ersen, O. I. Micic, P. A. Midgley, P. S. Nair, P. V. Kamat, P. Wang, Paul A. Midgley, R. Plass, S. A. Mcdonald, S. Bernal, S. C. Erwin, T. Mokari, V. Perebeinos, W. U. Huynh, W. W. Yu, W. Z. Ostwald, X. G. Peng, Y. W. Jun, Z. A. Peng, Z. A. Peng, Z. A. Peng   +46 more
core   +1 more source

Polyamide-rubber blends: micrscopic studies of the deformation zone [PDF]

, 1995
The morphology of injection moulded samples of polyamide—polybutadiene blends (85.15) with an average particle size of 0.3 μm was studied. The samples were fractured in a notched tensile test at crosshead speeds of 10−4 and 1 ms −1 and the structure of ...
Dijkstra, K., Dijkstra, Krijn, Gaymans, R.J., Janik, H., Janik-Jakubowska, H.Z.   +4 more
core   +8 more sources