Chemistry, materials, & energy publications
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Novel SiC/C Aerogels through Pyrolysis of Polycarbosilane Precursors
A new approach for forming aerogels with various silicon-based compositions and hybrids between ceramics and carbon has been developed by combining efficient hydrosilylation as the hybridization-crosslinking approach associated with gelation…
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Heater-Induced Ionization Inferred from Spectrometric Airglow Measurements
Spectrographic airglow measurements were made during an ionospheric modification experiment at High Frequency Active Auroral Research Program on 12 March 2013.
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Microdroplet Temperature Calibration Via Thermal Dissociation of Quenched DNA Oligomers
Here, we present a novel method for calibrating the temperature of microdroplets using quenched, fluorescently labeled DNA oligomers.
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Vapor Pressure Measurements of Mg(BH4)(2) Using Knudsen Torsion Effusion Thermo Graphic Method
The vapor pressure and molecular weight of effusing vapors of α, β, and amorphous Mg(BH4)2 were determined by Torsion-effusion gravimetric method, under dynamic vacuum. A Cahn balance in the system yielded the…
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Update on Mixed-Salt Technology Development for CO2 Capture from Post-Combustion Power Stations
The new mixed-salt technology combines the well-known ammonia and potassium carbonate technologies with improved reaction kinetics and reduced emissions.
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Calibration of Membrane Inlet Mass Spectrometric Measurements of Dissolved Gases: Differences in the Responses of Polymer and Nano-Composite Membranes to Variations in Ionic Strength
This work examines the transmission behavior of aqueous dissolved methane, nitrogen, argon and carbon dioxide through two types of membranes: a polysiloxane nano-composite (PNC) membrane and a conventional polydimethylsiloxane (PDMS) membrane.
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Controlled Mesoporosity in SiOC Via Chemically Bonded Polymeric Spacers
Silicon oxycarbides with controlled porosity in the mesopore range have been obtained through high-temperature pyrolysis of newly developed reactive siloxane formulations.
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Ringwoodite Rims around Olivine Fragments in Melt Vein of Antarctic Chondrite GRV022321: Transformation Kinetics
Ringwoodite rims around olivine in shocked veins of chondrites GRV 022321 were investigated by electron microscopes to elucidate mechanisms of transformation and Mg-Fe diffusion of olivine to ringwoodite, and estimate…
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Hydrogen Fuel-Cell Forklift Vehicle Releases in Enclosed Spaces
Sandia National Laboratories has worked with stakeholders and original equipment manufacturers (OEMs) to develop scientific data that can be used to create risk-informed hydrogen codes and standards for the safe…
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Growth Kinetics of the Anodic Oxide Film on Platinum under Potentiodynamic Polarization Conditions
A theory for the anodic oxidation of a metal under linear potentiodynamic conditions is derived based upon the Point Defect Model, by considering two contributions to the current; that from…
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A New Activated Carbon for CO2 Capture from Coal-Fired Boiler Flue Gas
With the current environmental interest in controlling greenhouse gases, there is a new focus on materials that can discriminate between gas molecules by capturing those gases that must be curtailed…
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Ferritin and Ferrihydrite Nanoparticles as Iron Sources for Pseudomonas Aeruginosa
The ability of Pseudomonas aeruginosa to acquire iron from exogenous ferritin was assessed; ferritin is an iron-concentrating and antioxidant protein complex composed of a catalytic protein and caged ferrihydrite nanomineral…