Results 51 to 60 of about 416,361 (295)

Effective plasmonic enhancement of up-conversion photoluminescence from $$\alpha$$ -NaGdF4:Yb3+,Er3+ nanoparticles by gold dendrites

Scientific Reports
The current paradigm of plasmon-enhanced up-conversion photoluminescence (PE-UCPL) lays in intimate coupling domains of noble metal and lanthanide-doped nanoparticles.
Ngoc Bao Tri Pham, Aliaksandr Burko, Valeryia Murashka, Diana Laputsko, Hanna Bandarenka, Alma Dauletbekova, Kahramon Mamatkulov, Grigory Arzumanyan   +7 more
doaj   +1 more source

Raman Topography and Strain Uniformity of Large-Area Epitaxial Graphene

, 2008
We report results from two-dimensional Raman spectroscopy studies of large-area epitaxial graphene grown on SiC. Our work reveals unexpectedly large variation in Raman peak position across the sample resulting from inhomogeneity in the strain of the ...
Berger C, Das A., de Heer W. A., Emtsev K. V., Faugeras C., Ferrari A. C., Forbeaux I., Geim A., Graf D., Gupta A., Johansson L. I., Ni Z. H., Novoselov K. S., Ohta T., Ohta T., Röhrl J., Seyller T., Vidano R. P.   +17 more
core   +1 more source

Sol–Gel Derived Polymer Precursors for Stereolithography of ZrC

Advanced Engineering Materials, EarlyView.
ZrC is a critical material target for extreme temperature conditions. This report describes a protocol for preparing ZrC ceramics via stereolithography and examines the impact of the polymer matrix on carbothermal reduction and mechanical stability of 3D printed ZrC.
Charles J. Rafalko, Evelyn Wang, Michael A. Hickner   +2 more
wiley   +1 more source

Integrated AWG spectrometer for on-chip optical coherence tomography and Raman spectroscopy [PDF]

, 2010
Silicon oxynitride-based arrayed waveguide grating (AWG) spectrometers were designed for on-chip spectral-domain optical coherence tomography (OCT) systems and Raman spectroscopy of the skin.
Akca, B.I., Driessen, A., Ismail, N., Kalkman, J., Leeuwen, T.G. van, Nguyen, V.D., Pollnau, M., Ridder, R.M. de, Sun, F., Wörhoff, K.   +9 more
core   +2 more sources

Thermophysical Properties of the Desulphurization Slags With Various CaS and CaO/Al2O3 Ratio

Advanced Engineering Materials, EarlyView.
This article investigates how CaS content and the CaO/Al2O3 ratio influence the thermophysical properties of desulphurization slags. Using experimental measurements and thermodynamic simulations, this study reveals complex effects on viscosity, surface tension, and density, providing new insight into slag structure and phase behavior under ...
Eldar Salpagarov, Matheus Roberto Bellé, Anton Yehorov, Julia Richter, Olena Volkova   +4 more
wiley   +1 more source

Characterization of a Recyclate‐Based MgO‐Steel Composite As‐Sintered Inert Anode Candidate After Exposure to Cryolite Electrolysis

Advanced Engineering Materials, EarlyView.
Carbon‐free inert anodes are essential for decarbonizing aluminum electrolysis. This study investigates a recyclate‐based MgO‐316L steel composite anode tested under galvanostatic Hall–Héroult conditions in cryolite at 1000°C. Microstructural analysis reveals selective MgO fluorination, spinel and oxide layer formation, electrolyte infiltration, and ...
Serhii Yaroshevskyi, Alexander Adamczyk, Nora Brachhold, Gert Schmidt, Jana Hubálková, R. Gumeniuk, Alexandros Charitos, Christos G. Aneziris   +7 more
wiley   +1 more source

New aspects of operando Raman spectroscopy applied to electrochemical CO2 reduction on Cu foams [PDF]

, 2019
The mechanism of electrochemical CO2 reduction (CO2RR) on copper surfaces is still insufficiently understood. Operando Raman spectroscopy is ideally suited to elucidate the role of adsorbed reaction intermediates and products.
Dau, Holger, Jiang, Shan, Klingan, Katharina, Pasquini, Chiara   +3 more
core   +1 more source

Corrosion and Process Analysis of a Preoxidized MgO Recyclate‐Based Cermet Anode in Laboratory‐Scale Na‐Cryolite Molten Salt Electrolysis of Aluminum at 1000°C

Advanced Engineering Materials, EarlyView.
EDX elemental map of the pre‐oxidized MgO–steel cermet anode cross section after electrolysis. The development of inert anodes for aluminum electrolysis remains challenging due to the high corrosivity of cryolite‐based melts at 950°C–1000°C. This study investigates the corrosion and process behavior of a carbon‐free MgO–steel cermet anode derived from ...
Alexander Adamczyk, Farhan Hossain, Felipe A. Garcia Paz, Serhii Yaroshevskyi, Felix Drechsler, Daniel Vogt, Christos G. Aneziris, Alexandros Charitos   +7 more
wiley   +1 more source

Stress Monitoring of Post-processed MEMS Silicon Microbridge Structures Using Raman Spectroscopy [PDF]

, 2012
Inherent residual stresses during material deposition can have profound effects on the functionality and reliability of fabricated Micro-Electro-Mechanical Systems (MEMS) devices.
Coutu, Ronald A., Jr., Starman, Lavern A.   +1 more
core   +1 more source

Controlling Nonequilibrium Phonon Populations in Single-Walled Carbon Nanotubes [PDF]

, 2007
We studied spatially isolated single-walled carbon nanotubes (SWNTs) immobilized in a quasi-planar optical λ/2-microresonator using confocal microscopy and spectroscopy.
Hartschuh, Achim, Meixner, Alfred Johann, Qian, Huihong, Steiner, Mathias   +3 more
core   +1 more source