Results 151 to 160 of about 61,406 (302)

A Functional 2D Carbon Allotrope Combining Nanoporous Graphene and Biphenylene Segments

Advanced Materials, EarlyView.
The synthesis of a novel nanoporous graphene (NPG) is reported with biphenylene segments via thermal fusion of 12‐armchair porous graphene nanoribbons grown on gold surfaces. Characterization using STM, AFM, and DFT reveals low‐defect semiconducting behaviour and tunable band gaps.
Paula Angulo‐Portugal, Martin Irizar, Longfeng Huang, Mamun Sarker, Mustafa A. Ashoush, Zakaria M. Abd El‐Fattah, Johannes Barth, Frederik Schiller, Afaf El‐Sayed, Fei Gao, Dimas G. de Oteyza, Alexander Sinitskii, Aran Garcia‐Lekue, Martina Corso, Ignacio Piquero‐Zulaica   +14 more
wiley   +1 more source

Topological Complexity of Configuration Spaces [PDF]

, 2010
In this thesis we study the homotopy invariant TC(X); the topological complexity of a space X. This invariant, introduced by Farber in [15], was originally motivated by a problem in Robotics; the motion planning problem.
COSTA, ARMINDO,EMANUEL, Costa, Armindo Emanuel   +1 more
core  

Dual-Output, Hybrid-Clamped, Quasi-Five-Level Inverter and Its Modulation Strategy

Energies
This paper proposes a novel, dual-output, hybrid-clamped, quasi-five-level inverter (DO-HC-FLI) topology, capable of providing two independent AC voltage outputs with adjustable frequency and amplitude.
Rutian Wang, Jiahui Wei, Yang Yu
doaj   +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

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

Advanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau, Christian N. Saggau, Stefan Baunack, Thomas Gemming, Yara Abdelaal, Robert Weser, Oliver G. Schmidt, Hagen Schmidt, Andreas Winkler, Mariana Medina‐Sánchez   +9 more
wiley   +1 more source

Generation of field-reversed configurations via neutral beam injection

Nature Communications
We report evidence of successful generation of field-reversed configuration plasmas by neutral beam injection. This is achieved by trapping the steady-state beams in an initial seed plasma, hence providing a direct source of toroidally directed energetic
T. Roche, S. Dettrick, A. Fontanilla, S. Gupta, M. Onofri, J. A. Romero, L. C. Steinhauer, M. T. Tobin, E. M. Granstedt, L. Galeotti, S. Karbashewski, R. M. Magee, P. Yushmanov, E. Trask, H. Gota, S. Abramov, I. Allfrey, R. Andow, V. Arceo, J. Aviles, D. C. Barnes, M. Beall, N. G. Bolte, D. Bui, F. Ceccherini, R. Clary, T. DeHaas, B. Denlinger, A. Van Drie, P. Feng, D. K. Gupta, K. Hubbard, J. S. Kinley, K. Knapp, B. Koop, S. A. Korepanov, A. Korepanov, C. K. Lau, D. Lieurance, D. MacDonald, D. Madura, J. A. Margarit, J. Margo, P. Marsden Sr, T. Matsumoto, M. P. Meekins, R. Mendoza, R. Michel, H. Monkhorst, M. E. Morehouse, M. Nations, A. Necas, B. S. Nicks, R. Page, E. Parke, J. Paulson, K. Phung, T. W. Rogers, L. Schmitz, J. H. Schroeder, G. N. Settles, A. G. H. Sibley, M. Signorelli, R. J. Smith, G. L. Snitchler, V. Sokolov, Y. Song, G. Strashnoy, L. Tagney, J. B. Titus, J. Ufnal, T. Valentine, C. E. Weixel, S. Weixel, C. White, M. Wollenberg, K. Zhai, S. Ziaei, M. Tuszewski, A. Smirnov, S. Putvinski, T. Tajima, M. W. Binderbauer   +82 more
doaj   +1 more source

Spin‐Split Edge States in Metal‐Supported Graphene Nanoislands Obtained by CVD

Advanced Materials, EarlyView.
Combining STM measurements and ab‐initio calculations, we show that zig‐zag edges in graphene nanoislands grown on Ni(111) by CVD retrieve their spin‐polarized edge states after intercalation of a few monolayers of Au. ABSTRACT Spin‐split states localized on zigzag edges have been predicted for different free‐standing graphene nanostructures.
Michele Gastaldo, Masoud Mansouri, Carlos Garcia‐Fernandez, Daniel Sánchez‐Portal, Aran Garcia‐Lekue, Gustavo Ceballos, Aitor Mugarza   +6 more
wiley   +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

Azaporphyrinoid‐Based Photo‐ and Electroactive Architectures for Advanced Functional Materials

Advanced Materials, EarlyView.
A long‐standing collaboration between the Torres and Guldi groups has yielded diverse azaporphyrinoid‐based donor‐acceptor nanohybrids with promising applications in solar energy conversion. This conspectus highlights key molecular platforms and structure‐function relationships that govern light and charge management, supporting the rational design of ...
Jorge Labella, Kobra Azizi, Dirk M. Guldi, Tomás Torres   +3 more
wiley   +1 more source

INTEGRATED TOPOLOGY OPTIMIZATION OF STRUCTURE /CONTROL FOR PIEZOELECTRIC SMART PLATE AND ITS TOPOLOGY EXTRACTION BASED ON MICRO-GENETIC ALGORITHM

Jixie qiangdu, 2016
The integrated topology optimization design with respect to the structural topology configuration,the placements and the numbers of actuators as well as the control system weight parameters of a cantilever piezoelectric intelligent plate is studied in ...
HE JianJun, CHEN XiangZi
doaj