Results 61 to 70 of about 21,857 (278)

VO$_2$ as a natural optical metamaterial

, 2017
VO$_2$ is a unique phase change material with strongly anisotropic electronic properties. Recently, samples have been prepared that present a co-existence of phases and thus form metal-insulator junctions of the same chemical compound.
Calzolari, Arrigo, Catellani, Alessandra, Eaton, Miller   +2 more
core   +1 more source

Efficient Process Development for Laser Powder Bed Fusion of a Soft‐Magnetic Metallic Glass Composite

Advanced Engineering Materials, EarlyView.
Iron‐based metallic glass alloys exhibit excellent soft‐magnetic properties, and unprecedented geometrical freedom in the design of soft‐magnetic metallic glass components is made possible by additive manufacturing. An efficient workflow for developing parameters for laser‐based powder bed fusion of a Fe‐based metallic glass alloy is presented along ...
Julia Löfstrand, Priyanka Saha, Vidhiaza Leviandhika, Urban Wiklund, Alexander Elsen, Carolin Zintel, Lena Thorsson, Petra E. Jönsson   +7 more
wiley   +1 more source

A Universal BRDF Archetype Database for Normalizing Directional Reflectance to Nadir BRDF Adjusted Reflectance

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Surface reflectance varies with changes in solar and viewing angles, exhibiting distinct anisotropic reflectance characteristics, which can be characterized using the bidirectional reflectance distribution function (BRDF).
Qianrui Xi, Hu Zhang, Junqin Xie, Xiaoning Zhang, Hongtao Cao, Yan Liu, Lei Cui, Yadong Dong   +7 more
doaj   +1 more source

Negative-index bi-anisotropic photonic metamaterial fabricated by direct laser writing and silver shadow evaporation

, 2008
We present the blueprint for a novel negative-index metamaterial. This structure is fabricated via three-dimensional two-photon direct laser writing and silver shadow evaporation.
Chen, Christine E. Kriegler, Dolling, Georg von Freymann, Liu, Marqués, Martin Wegener, Michael S. Rill, Michael Thiel, Pendry, Rill, Schweizer, Shalaev, Smith, Soukoulis, Stefan Linden, Valentine   +16 more
core   +1 more source

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source

Ab initio optical properties of Si(100)

, 1999
We compute the linear optical properties of different reconstructions of the clean and hydrogenated Si(100) surface within DFT-LDA, using norm-conserving pseudopotentials. The equilibrium atomic geometries of the surfaces, determined from self-consistent
A. I. Shkrebtii, A. Ramstad, A. Shkrebtii, A.F. Starace, Bernardo S. Mendoza, C. Kress, D.M. Ceperley, E.G. Keim, F. Manghi, G. Bachelet, Giovanni Onida, H. Farrell, H. Shigekawa, J.E. Northrup, J.P. Perdew, L. Kipp, L. Kleinman, L.S. Johansson, L.S. Johansson, M. Kubots, Maurizia Palummo, O. Pulci, P. Hohenberg, P. Kruger, P.E. Wierenga, R. Del Sol, R. Del Sole, R. Del Sole, R. Shioda, R.J. Cole, Rodolfo Del Sole, S. G. Jaloviar, S. Goedecker, S. Goedecker, T. Tabata, T. Yasuda, T. Yokoyama, T. Yokoyama, V. I. Gavrilenko, W. Kohn, Y.J. Chabal   +40 more
core   +1 more source

Design and Prototyping of Topology‐Optimized, Additively Manufactured Lightweight Components for Space Robotic Systems: A Case Study

Advanced Engineering Materials, EarlyView.
The results demonstrate a simulation‐driven workflow that applies LSB topology optimization with additive manufacturing constraints to mission‐specific load cases, integrating European Cooperation for Space Standardization compliant verification and manufacturability to develop structurally efficient rover suspension components.
Stelios K. Georgantzinos, Grigorios Kostopoulos, Eleni Papadopoulou, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria N. Gkara, Chara Ch. Mitropoulou, Georgios Kazakis, Alin Munteanu, Jeremi Gancet, Nikos D. Lagaros   +11 more
wiley   +1 more source

Retrieving tropospheric nitrogen dioxide from the Ozone Monitoring Instrument: effects of aerosols, surface reflectance anisotropy, and vertical profile of nitrogen dioxide [PDF]

Atmospheric Chemistry and Physics, 2014
Retrievals of tropospheric nitrogen dioxide (NO2) from the Ozone Monitoring Instrument (OMI) are subject to errors in the treatments of aerosols, surface reflectance anisotropy, and vertical profile of NO2.
J.-T. Lin, R. V. Martin, K. F. Boersma, M. Sneep, P. Stammes, R. Spurr, P. Wang, M. Van Roozendael, K. Clémer, H. Irie   +9 more
doaj   +1 more source

Observation of Multiple-Gap Structure in Hidden Order State of URu2Si2 from Optical Conductivity

, 2012
We have measured the far infrared reflectance of the heavy fermion compound URu$_2$Si$_2$ through the phase transition at T$_{HO}$=17.5 K dubbed 'hidden order' with light polarized along both the a- and c-axes of the tetragonal structure.
Hall, Jesse S., Luke, Graeme, Nagel, Urmas, Rõõm, Toomas, Timusk, Thomas, Uleksin, Taaniel, Williams, Travis   +6 more
core   +1 more source

Engineering Deformation and Failure in Diamond Triply Periodic Minimal Surface Lattices via 3D Wall‐Thickness Grading

Advanced Engineering Materials, EarlyView.
The work demonstrates that strategic wall‐thickness grading in diamond triply periodic minimal surface lattices enables precise tuning of deformation and failure behavior under compression. Different gradation patterns guide how and where the structure collapses, improving energy absorption or promoting controlled brittle failure.
Giovanni Rizza, Danilo Bruson, Manuela Galati, Luca Iuliano   +3 more
wiley   +1 more source