Results 111 to 120 of about 100,599 (299)

Level Set Approach to Reversible Epitaxial Growth

, 2001
We generalize the level set approach to model epitaxial growth to include thermal detachment of atoms from island edges. This means that islands do not always grow and island dissociation can occur.
A. Zangwill, C. Ratsch, C. Ratsch, C. Ratsch, C. Ratsch, C. Ratsch, D. L. Chopp, G. S. Bales, G. S. Bales, H. M. Koduvely, H. Metiu, J. G. Amar, M. Petersen, R. E. Caflisch, R. E. Caflisch, R. E. Caflisch, R. S. Ross, S. Chen, S. Clarke, S. Osher, S. Stoyanov, W. K. Burton   +21 more
core   +1 more source

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Effect of epitaxial strain and lattice mismatch on magnetic and transport behaviors in metamagnetic FeRh thin films

AIP Advances, 2017
We grew 80 nm FeRh films on different single crystals with various lattice constants. FeRh films on SrTiO3 (STO) and MgO substrates exhibit an epitaxial growth of 45° in-plane structure rotation.
Yali Xie, Qingfeng Zhan, Tian Shang, Huali Yang, Baomin Wang, Jin Tang, Run-Wei Li   +6 more
doaj   +1 more source

Impurity-induced diffusion bias in epitaxial growth

, 1996
We introduce two models for the action of impurities in epitaxial growth. In the first, the interaction between the diffusing adatoms and the impurities is ``barrier''-like and, in the second, it is ``trap''-like.
B. Voigtländer, C. J. Lanczycki, D. E. Wolf, D. J. Eaglesham, D. Kandel, D. Kandel, D. P. Adams, G. Ehrlich, I. Markov, J. E. Vasek, J. Krug, J. Krug, J. P. v.d. Eerden, J. Villain, Joachim Krug, L.-H. Tang, Luís A. Nunes Amaral, M. Copel, M. Kardar, M. Siegert, M. Siegert, N. Cabrera, P. I. Tamborenea, P. Smilauer, R. L. Schwoebel, S. Das Sarma, S. F. Edwards, S. Liu, W. W. Mullins, Z. Zhang, Z.-W. Lai   +30 more
core   +1 more source

Crystal Growth Engineering for Dendrite‐Free Zinc Metal Plating

Advanced Materials, EarlyView.
This research employed the rare‐earth ion dysprosium (Dy) to modulate aqueous zinc (Zn) metal plating. Integrated multiscale experiments and computational modeling unveiled the preferential adsorption of Dy on specific crystal facets, which activated screw dislocation‐driven Zn growth.
Guifang Zeng, Sharona Horta, Qing Sun, Malik Dilshad Khan, Maria Ibáñez, Yuhang Han, Shang Wang, Longqiu Li, Lijie Ci, Yanhong Tian, Andreu Cabot   +10 more
wiley   +1 more source

Growth of epitaxially oriented Ag nanoislands on air-oxidized Si(111)-(7x7) surfaces: Influence of short range order on the substrate

, 2010
Clean Si(111)-(7{x7) surfaces, followed by air-exposure, have been investigated by reflection high energy electron diffraction (RHEED) and scanning tunneling microscopy (STM).
Anupam Roy, Argile, B.N. Dev, Baletto, Carriere, Chen, Chu, Fujita, Gavioli, Goswami, Goswami, Gotoh, Hall, Hanbucken, Hasegawa, Hollinger, Hur, Hur, Iback, Iwasaki, J. Ghatak, Jin, K. Bhattacharjee, Kastner, Lander, Le Lay, Li, Maeda, Marks, Muller, Nakayama, Nakayama, Nason, Nason, Neddermeyer, Nishimura, Novikov, Persat, Peyser, Ren, Roy, Roy, Sato, Schlier, Sekar, Shklyaev, Tabe, Tang, Venables, Wadayama, Wang, Williams, Zuo   +52 more
core   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Epitaxial Growth Kinetics with Interacting Coherent Islands

, 1999
The Stranski-Krastanov growth kinetics of undislocated (coherent) 3-dimensional islands is studied with a self-consistent mean field rate theory that takes account of elastic interactions between the islands.
A. Ponchet, A. Zangwill, C. Ratsch, C. Ratsch, G. S. Bales, G. S. Bales, H. M. Koduvely, H. T. Dobbs, H. T. Dobbs, I. Daruka, J. A. Stroscio, J. G. Amar, J. M. Rickman, J. Tersoff, M. C. Bartelt, M. Schroeder, N. P. Kobayashi, P. B. Joyce, V. A. Shchukin, W. Seifert, Y. Ebiko   +20 more
core   +1 more source

Flexoelectrically Induced Polar Topology in Twisted SrTiO3 Membranes

Advanced Materials, EarlyView.
Twisted SrTiO3 bilayers host polar vortices of flexoelectric origin, revealed through combined experiment and theory. By reconstructing polarization from the toroidal moment of strain gradients, the work establishes a 3D chiral state with broken inversion and mirror symmetries.
Isabel Tenreiro, Hugo Aramberri, Víctor Rouco, Gabriel Sánchez‐Santolino, Mariona Cabero, Fernando Gallego, David Sánchez‐Manzano, José M. González‐Calbet, Federico Mompeán, Mar García‐Hernández, Alberto Rivera‐Calzada, Jorge Íñiguez‐González, Carlos León, Jacobo Santamaría   +13 more
wiley   +1 more source

Effect of Atomic Layer Deposition of Ultra‐Thin Oxide on Reactivity and Durability of Perovskite Oxygen Electrodes

Advanced Materials, EarlyView.
This table of contents illustrates that the mechanism for mitigating Sr segregation depends strongly on the chemistry of the coating layer. HfO2 electrostatically stabilizes the surface by lowering the surface oxygen vacancies, which serve as the driving force for Sr migration. On the other hand, Al2O3 and Fe2O3 react with segregated Sr to form Sr‐Al‐O
Jongsu Seo, SungHyun Jeon, Hyunseung Kim, San Kwak, DongHwan Oh, Bonjae Koo, Jinwook Kim, Jeong Hwan Kim, WooChul Jung   +8 more
wiley   +1 more source