Results 91 to 100 of about 188,936 (339)

Facet‐Junction Induced Strong Metal Support Interaction for Enhanced Alkaline Hydrogen Evolution Reaction

open access: yesAdvanced Functional Materials, EarlyView.
In this study, a novel facet‐junction strategy is proposed to enhance the strong metal‐support interaction (SMSI) between the loaded Ru atoms and the Co3O4 support. The synthesized structure with the incorporation of Ru doping and the (100)/(111) crystal plane junction has a particular influence on the catalyst's hydrogen evolution reaction (HER ...
Wenqian Shen   +6 more
wiley   +1 more source

Direct Observation of Early-stage Quantum Dot Growth Mechanisms with High-temperature Ab Initio Molecular Dynamics [PDF]

open access: yes, 2015
Colloidal quantum dots (QDs) exhibit highly desirable size- and shape-dependent properties for applications from electronic devices to imaging. Indium phosphide QDs have emerged as a primary candidate to replace the more toxic CdSe QDs, but production of
Jensen, Klavs F.   +3 more
core   +4 more sources

The Effect of α-Fe2O3(0001) Surface Containing Hydroxyl Radicals and Ozone on the Formation Mechanism of Environmentally Persistent Free Radicals

open access: yesToxics
The formation of environmentally persistent free radicals (EPFRs) is mediated by the particulate matter's surface, especially transition metal oxide surfaces.
Danli Liang   +7 more
doaj   +1 more source

Structure of Dihydrochalcones and Related Derivatives and Their Scavenging and Antioxidant Activity against Oxygen and Nitrogen Radical Species

open access: yesMolecules, 2011
Quantum mechanical calculations at B3LYP/6-31G** level of theory were employed to obtain energy (E), ionization potential (IP), bond dissociation enthalpy (O-H BDE) and stabilization energies (DEiso) in order to infer the scavenging activity of ...
Alexandre L. A. Bentes   +4 more
doaj   +1 more source

Theoretical analysis and kinetic modeling on hydrogen addition and abstraction by H radical of 1,3-cyclopentadiene and the associated chain-branching reactions [PDF]

open access: yesarXiv, 2019
Cyclopentadiene (CPD) is an important intermediate in the combustion of fuel and the formation of aromatics. In the present study, the kinetics and thermodynamic properties for hydrogen abstraction and addition with CPD, and the related reactions including the isomerization and decomposition on the C5H7 potential energy surface were systematically ...
arxiv  

Metrology and Many-Body Physics with Ultracold Metastable Helium [PDF]

open access: yesarXiv, 2022
Ultracold dilute gases provide ideal settings for measurements of atomic structure. Helium has an internal structure sufficiently simple to permit highly accurate predictions of its resonances and transition rates. Precise laser spectroscopy of helium thus yields empirical constraints on such calculations.
arxiv  

Electrically Insulating Electromagnetic Interference Shielding Materials: A Perspective

open access: yesAdvanced Functional Materials, EarlyView.
Developing electromagnetic interference (EMI) shielding materials with inherent electrical insulation and high EMI shielding effectiveness is challenging but important for electronic applications. This perspective summarizes the recent advancements in designing electrically insulating EMI shielding materials and discusses the underlying mechanisms of ...
Ji Liu, Valeria Nicolosi
wiley   +1 more source

Chemical dynamics of triacetylene formation and implications to the synthesis of polyynes in Titan's atmosphere [PDF]

open access: yes, 2009
For the last four decades, the role of polyynes such as diacetylene (HCCCCH) and triacetylene (HCCCCCCH) in the chemical evolution of the atmosphere of Saturn's moon Titan has been a subject of vigorous research. These polyacetylenes are thought to serve
A. M. Mebel   +14 more
core   +2 more sources

Using Variable and Fixed Topological Indices for the Prediction of Reaction Rate Constants of Volatile Unsaturated Hydrocarbons with OH Radicals

open access: yesMolecules, 2004
mVolatile organic compounds (VOCs) play an important role in differentphotochemical processes in the troposphere. In order to predict their impact on ozoneformation processes a detailed knowledge about their abundance in the atmosphere as wellas their ...
Alexandru T. Balaban   +3 more
doaj   +1 more source

3D‐Printed and Recombinant Spider Silk Particle Reinforced Collagen Composite Scaffolds for Soft Tissue Engineering

open access: yesAdvanced Functional Materials, EarlyView.
The newly developed, combined 3D‐extrusion bioprinting process of a collagen ink and a recombinant spider silk precipitation bath with a subsequent potassium phosphate post‐treatment fabricates spider silk particle‐reinforced, fibrillar collagen scaffolds with promising properties for soft tissue engineering.
Kim Sarah Koeck   +2 more
wiley   +1 more source

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