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Showing 1 to 20 of 21 for “"Reflection Absorption Infrared Spectroscopy"”.
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Hafnium Dioxide Nanoparticle Thin Film Morphology and Reactivity with Dimethyl Methylphosphonate
… and the surface reaction is analyzed by reflection-absorption infrared spectroscopy.
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Quartz Crystal Microbalance Studies of Dimethyl Methylphosphonate Sorption Into Trisilanolphenyl-Poss Films
… films has previously been characterized with reflection absorption infrared spectroscopy, x-ray photoelectron spectroscopy, and uptake coefficient determinations [1]. In our study, the quartz crystal microbalance (QCM) is used to study the sorption phenomena of DMMP into highly ordered …
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The Direct Dissociation of Methanol on V(100) Surfaces
… characterized through use of X-ray photoelectron spectroscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy. This surface characterization revealed significant oxidation of the vanadium surface from atmospheric oxygen, water and carbon dioxide. The direct dissociation and …
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Fundamental Studies of Reactions between NO3 Radicals and Organic Surfaces
… surface reactions were monitored in situ with reflection-absorption infrared spectroscopy (RAIRS). The oxidation states of surface-bound molecules were identified with X-ray photoelectron spectroscopy (XPS). Consumption of vinyl groups was observed concurrently with formation of organic …
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Fundamental Studies of Two Important Atmospheric Oxidants, Ozone and Hydroxyl Radical, Reacting with Model Organic Surfaces
… ozone and solid pentacene was investigated using Reflection Absorption Infrared Spectroscopy (RAIRS). Ozone was found to add to pentacene non-selectively and form a range of products after heavy ozone exposure. The rate limiting step had an activation energy of 17 kJ/mol, which is consistent with …
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Boundary Layer Dynamics in Mixed Hydrocarbon Thin Films on Metal Surfaces
… and quantified. Due to the selectivity of reflection absorption infrared spectroscopy, both identification of chemical species and determination of the position and orientation of each component in the assembly can be accomplished. Vibrational spectroscopy of these adsorbates and the origin …
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Relationship between molecular structure and surface properties of self-assembled monolayers
… with the phthalic anhydride were studied using reflection absorption infrared spectroscopy, contact angle measurement, ellipsometry, and electrochemical measurements. Reactions on the monolayers are used to model the attachment of an insulating polyimide to the substrate. The covalent attachment …
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Understanding the Surface Induced Phosphorylation of Prebiotic Molecules by Schreibersite
… (SEM) coupled with energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS), which showed some oxidation and segregation of phosphorous within the near-surface region. The interaction and/or reaction of water (H<sub>2</sub>O), methanol (CH<sub>3</sub>OH), formic …
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Interfacial Reaction of an Olefin-Terminated Self-Assembled Monolayer Exposed to Nitrogen Dioxide: An Investigation Into the Reaction Rate and Mechanism
… on Au(111) made and characterized using Reflection-Absorption Infrared Spectroscopy (RAIRS). This unsaturated surface was then exposed to NO2 at a pressure of 1x10-4 mbar in a UHV (Ultrahigh Vacuum) chamber. Time-resolved RAIRS was preformed in situ to monitor the reaction during …
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The Reactivity of Chemical Warfare Agent Simulants on Carbamate Functionalized Monolayers and Ordered Silsesquioxane Films
… techniques including: contact angle goniometry, reflection-absorption infrared spectroscopy (RAIRS), X-ray photoelectron spectroscopy (XPS) and temperature-programmed desorption (TPD) measurements. In conjunction with surface probes, uptake coefficients were monitored according to the King and …
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Metal Oxide Nanoparticles: Optical Properties and Interaction with Chemical Warfare Agent Simulants
… yttrium oxide nanoparticles using laser spectroscopy. Experimental evidence collected with this study indicates that interparticle, lanthanide-mediated energy transfer may have been observed. In addition, lanthanide-doped gadolinium oxide nanoparticles were synthesized and investigated …
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Reflection Absorption Infrared Spectroscopic Studies of Surface Chemistry Relevant to Chemical and Biological Warfare Agent Defense
Reflection absorption infrared spectroscopy was used as the primary analysis technique to study the interfacial chemistry of surfaces relevant to chemical and biological warfare agent defense. Many strategies utilized by the military to detect and decompose chemical and biological warfare agents …
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Investigations of Bacteria Viability on Surfaces Using ω-functionalized Alkanethiol Self-Assembled Monolayers
… before interaction with bacteria by reflection-absorption infrared spectroscopy (RAIRS) and X-ray photoelectron spectroscopy (XPS). Determination of the viability of Escherichia coli on the surfaces was performed via the antibacterial assay. In the assay, a culture of E. coli was …
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Ultrahigh Vacuum Studies of the Reaction Mechanisms of Ozone with Saturated and Unsaturated Self-Assembled Monolayers
… reactions can be monitored in real-time with reflection absorption infrared spectroscopy (RAIRS) and mass spectrometry. The chemical identity of adsorbates on a surface can also be determined before or after a reaction with X-ray photoelectron spectroscopy (XPS). Disordering of the monolayers …
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Poly(L-Lactic Acid) Langmuir Monolayers at the Air/Water Interface and Langmuir-Blodgett Films on Solid Substrates: Phase Behavior, Surface Morphology, and Crystallinity
… of lamellar dimensions, x-ray reflectivity, and reflection absorption infrared spectroscopy (RAIRS) measurements on PLLA LB-films are consistent with PLLA existing as single molecule 10/3-helices at the A/W interface. Morphologies observed after collapse of the LC monolayer are dependent upon the …
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Area selective atomic layer deposition of silicon dioxide on silicon dioxide using surface passivation of copper non-growth surface
… HT, B: DSBAS, C: O3/O¬2 plasma). Using in situ reflection absorption infrared spectroscopy (RAIRS) and x-ray photoelectron spectroscopy (XPS) we indicate minimal accumulation of SiO2 on Cu surface at 100 °C and partial oxidation of Cu surface for both O3 and O2 plasma-based processes. We also …
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Ultrahigh Vacuum Studies of the Reaction Kinetics and Mechanisms of Nitrate Radical with Model Organic Surfaces
… The experimental approach employs in situ reflection-absorption infrared spectroscopy (RAIRS) to monitor bond rupture and formation while a well-characterized flux of NO3 impinges on the organic surface. Overall, the reaction kinetics and mechanisms were found to depend on the terminal …
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Vibrational Spectroscopic Studies of Degradation and Diffusion Processes in Poly(ethylene terephthalate)
… thick, has been followed using Founer transform infrared attenuated total reflectance, FT-IR ATR, spectroscopy. Films of differing degrees ofcrystallinity were prepared using two different methods. One method involved the annealing ofthe cast films at 85-90° C for different lengths oftime, to …
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Investigation of the Structure of Alkyne Self-Assembled Monolayers on Gold and the Development of Matrix-Enhanced Secondary Ion Mass Spectrometry Methods
… low concentration species present on surfaces. A reflection adsorption infrared spectroscopy: RAIRS) system was constructed and tested. The instrument comprises an Fourier transform infrared: FTIR) spectrometer, an optical pathway and a vacuum chamber. The RAIRS system is designed to investigate …
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Dynamics of Atmospherically Important Triatomics in Collisions with Model Organic Surfaces
… analysis techniques: cavity ring-down aerosol spectroscopy (CRD-AS) at 355 nm and 532 nm, photoacoustic spectroscopy (PAS) at 532 nm, and an aerosol mass spectrometer (AMS). Heterogeneous reactions may lead to the nitration of organic-coated aerosols, which may account for atmospheric …
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