S
Stephen J. Harley
Researcher at Lawrence Livermore National Laboratory
Publications - 33
Citations - 465
Stephen J. Harley is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: Sorption & Wine. The author has an hindex of 12, co-authored 33 publications receiving 419 citations. Previous affiliations of Stephen J. Harley include University of California, Davis & University of California.
Papers
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Journal ArticleDOI
Thermodynamic study on dynamic water vapor sorption in Sylgard-184.
TL;DR: The results demonstrate that moisture is able to penetrate the material over a range of temperatures and humidities and quantitatively assesses how water vapor diffuses and ad/absorbs into polymeric materials that are traditionally considered hydrophobic.
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Reduced Phase Separation and Slowing of Dynamics in Polyurethanes with Three-Dimensional POSS-Based Cross-Linking Moieties
Konstantinos N. Raftopoulos,Stefanos Koutsoumpis,Małgorzata Jancia,James P. Lewicki,Konstantinos Kyriakos,Harris E. Mason,Stephen J. Harley,Edyta Hebda,Christine M. Papadakis,Krzysztof Pielichowski,Polycarpos Pissis +10 more
TL;DR: Microscopy, scattering, spectroscopic, thermal, and dielectric techniques show that the covalent inclusion of the cross-linking particles restricts microphase separation, inhibits the formation of hard-block domains, and decelerates the motional dynamics of the polyurethane backbone.
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Use of NMR Spectroscopy in the Synthesis and Characterization of Air- and Water-Stable Silicon Nanoparticles from Porous Silicon
TL;DR: In this article, bromine oxidation of porous silicon nanoparticles followed by reaction with n-butyllithium was shown to be stable in air and water indefinitely, and a combination of infrared, ultraviolet/visible, and photoluminescence demonstrated the presence of small crystalline silicon particles and saturated hydrocarbon ligands, while solid and liquid-state nuclear magnetic resonance spectroscopies established that butyl ligands are localized on the nanocrystal surface.
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Rates of Water Exchange for Two Cobalt(II) Heteropolyoxotungstate Compounds in Aqueous Solution
C. André Ohlin,Stephen J. Harley,J. Gregory McAlpin,Rosalie K. Hocking,Brandon Q. Mercado,Rene L. Johnson,Eric M. Villa,Eric M. Villa,Mary Kate Fidler,Marilyn M. Olmstead,Leone Spiccia,R. David Britt,William H. Casey +12 more
TL;DR: The exchange rates of water ligated to Co(II) atoms in two polyoxotungstate sandwich molecules using the (17)O-NMR-based Swift-Connick method are reported and the molecules are clearly stable and monospecific in slightly acidic solutions, but dissociate in strongly acidic solutions.
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Modeling and Uncertainty Quantification of Vapor Sorption and Diffusion in Heterogeneous Polymers
TL;DR: Water uptake in silica-filled and unfilled poly(dimethylsiloxane) networks is investigated; however, the model is versatile enough to be used with a wide range of materials and vapors.