Results 81 to 90 of about 12,021 (226)

Room Temperature InP DFB Laser Array Directly Grown on (001) Silicon

open access: yes, 2015
Fully exploiting the silicon photonics platform requires a fundamentally new approach to realize high-performance laser sources that can be integrated directly using wafer-scale fabrication methods.
Absil, Philippe   +7 more
core   +1 more source

Influence of tetramethylammonium hydroxide on niobium nitride thin films

open access: yesJournal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, 2018
Functionality of superconducting thin-film devices such as superconducting nanowire single photon detectors stems from the geometric effects that take place at the nanoscale. The engineering of these technologies requires high-resolution patterning, often achieved with electron beam lithography.
Emily Toomey   +3 more
openaire   +1 more source

Laser‐Induced‐Structural Transformation in Ti3CNTx MXene Monitored by Raman Spectroscopy with DFT Insight

open access: yesSmall, EarlyView.
A multi‐wavelength Raman study of microwave‐assisted hydrothermal Ti3CNTx MXene, supported by theoretical calculations, identifies laser‐power thresholds and evaluates its ambient‐condition stability. ABSTRACT MXenes are emerging 2D nanomaterials that have attracted growing attention for their highly tunable atomic structure, composition, and surface ...
Subrata Ghosh   +7 more
wiley   +1 more source

Bendable Zeolite Membrane: Rapid Synthesis with Improved Separation Performance [PDF]

open access: yes, 2015
Mathematical and Physical Sciences: 2nd Place (The Ohio State University Edward F. Hayes Graduate Research Forum)Separation of CO2 emitted from stationary resources is effective in reducing CO2 content in the atmosphere, thereby mitigating adverse ...
Wang, Bo
core  

Dimethyl‐, Diethyl‐, and Propylene Carbonates: An Emerging Class of Green Solvents for Organic Synthesis

open access: yesThe Chemical Record, EarlyView.
This review highlights recent advances in the use of organic carbonates, dimethyl carbonate (DMC), diethyl carbonate (DEC), and propylene carbonate (PC), as solvents in organic synthesis. Based on over seventy studies from the past 6 years, it shows their application in different organic reaction types, emphasizing their role in safer and more ...
Gabriela T. Quadros   +5 more
wiley   +1 more source

Use of CeO₂, TiO₂ and Fe₃O₄ nanoparticles for the removal of lead from water : toxicity of nanoparticles and derived compounds [PDF]

open access: yes, 2011
Financial support was provided by the Spanish Ministerio de Medio Ambiente y Medio Rural y Marino (Project Exp. 007/RN08/03.1). Sonia Recillas thanks Universitat Autònoma de Barcelona for the award of a post-doctoral fellowship.Nanoparticles (NPs ...
Casals, Eudald   +6 more
core   +2 more sources

The Origin of Efficiency in III‐Nitride Micro‐Light‐Emitting Diodes

open access: yesAdvanced Science, Volume 13, Issue 25, 4 May 2026.
The images show panchromatic cathodoluminescence of III‐V materials, which reveal that AlGaInP red wafers, having fewer defects, support longer carrier diffusion lengths. Meanwhile, the density of defects increases with longer emission wavelengths in the InGaN system, illustrating how generated carriers pass through the material and how defects limit ...
Jeong‐Hwan Park   +11 more
wiley   +1 more source

Metabolic Processes Preserved as Biosignatures in Iron-Oxidizing Microorganisms: Implications for Biosignature Detection on Mars [PDF]

open access: yes
Iron-oxidizing bacteria occupy a distinct environmental niche. These chemolithoautotrophic organisms require very little oxygen (when neutrophilic) or outcompete oxygen for access to Fe(II) (when acidophilic).
Emerson, David   +3 more
core   +1 more source

Evaluation of extraction employing tetramethylammonium hydroxide for traceability of brazilian meat. [PDF]

open access: yes, 2011
Bovine traceability is an important tool for the control of quality of the meat. It can assist in the identification of disease outbreaks, well-being of creation, fraud control and still ensure the origin of meat, adding value to the product in front of ...
GROMBONI, C. F.   +2 more
core  

Experimental methods in chemical engineering: Atomic absorption spectrometry—AAS

open access: yesThe Canadian Journal of Chemical Engineering, Volume 104, Issue 5, Page 2206-2224, May 2026.
Abstract Elements absorb electromagnetic radiation (light) of a specific wavelength in proportion to the number of atoms in its path. As the atoms absorb this light energy, electrons rise from the ground state to an excited state. In atomic absorption spectrometry (AAS), high temperatures produce clouds of atoms from the sample (atomization) and ...
Emily Cintia Tossi de A. Costa   +4 more
wiley   +1 more source

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