Search Results - "GIDLEY, D. W"

Effect of Dimethyl Terephthalate and Dimethyl Isophthalate on the Free Volume and Barrier Properties of Poly(ethylene terephthalate) (PET): Amorphous PET by Zekriardehani, S, Joshi, A. S, Jabarin, S. A, Gidley, D. W, Coleman, M. R

“…The effect of blending two low molecular weight diluents (LMWD), dimethyl terephthalate (DMT) and dimethyl isophthalate (DMI), on the microstructure, free…”
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Positronium emission spectra from self-assembled metal-organic frameworks by Crivelli, P., Cooke, D., Barbiellini, B., Brown, B. L., Feldblyum, J. I., Guo, P., Gidley, D. W., Gerchow, L., Matzger, A. J.

“…Results of positronium (Ps) emission into vacuum from self-assembled metal-organic frameworks (MOFs) are presented and discussed in detail. Four different MOF…”
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Determination of Pore Size in Mesoporous Thin Films from the Annihilation Lifetime of Positronium by Dull, T. L, Frieze, W. E, Gidley, D. W, Sun, J. N, Yee, A. F

“…An existing model that relates the annihilation lifetime of positronium trapped in subnanometer pores to the average size of the pores is extended to account…”
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Resolution of the orthopositronium-lifetime puzzle by Vallery, R S, Zitzewitz, P W, Gidley, D W

“…The long-standing discrepancy [G. S. Adkins, R. N. Fell, and J. Sapirstein, Ann. Phys. (N.Y.) 295, 136 (2002)]] between the theoretical calculations of the…”
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Interface and Surface Effects on the Glass Transition in Thin Polystyrene Films by DeMaggio, G. B., Frieze, W. E., Gidley, D. W., Zhu, Ming, Hristov, H. A., Yee, A. F.

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Determination of pore-size distribution in low-dielectric thin films by Gidley, D. W., Frieze, W. E., Dull, T. L., Sun, J., Yee, A. F., Nguyen, C. V., Yoon, D. Y.

“…Positronium annihilation lifetime spectroscopy is used to determine the pore-size distribution in low-dielectric thin films of mesoporous methylsilsesquioxane…”
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Measurement of Hole Volume in Amorphous Polymers Using Positron Spectroscopy by Hristov, H. A, Bolan, B, Yee, A. F, Xie, L, Gidley, D. W

“…Positron annihilation lifetime spectroscopy (PALS) measurements, in the temperature range 110−480 K, are given for three linear, amorphous polymers. Based on…”
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Positronium formation as a probe of polymer surfaces and thin films by Xie, L, DeMaggio, GB, Frieze, WE, DeVries, J, Gidley, DW, Hristov, HA, Yee, AF

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Properties of nanoporous organosilicate hybrid thin films with a bimodal pore size distribution by Hyeon-Lee, J, Rhee, J, Yim, JH, Jeong, HD, Gidley, DW

“…Low dielectric poly[methylsilsesquioxane‐ran‐trifluoropropylsilsesquioxane‐ran‐(2,4,6,8‐tetramethyl‐2,4,6,8‐tetraethylenecyclotetrasiloxane)silsesquioxane]s…”
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New precision measurement of the decay rate of singlet positronium by Al-Ramadhan, AH, Gidley, DW

“…The singlet decay rate has been measured using magnetic singlet-triplet state mixing for positronium formed in a [ital N][sub 2]-isobutane gas mixture. We find…”
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The Direct Patterning of Nanoporous Interlayer Dielectric Insulator Films by Nanoimprint Lithography by Ro, H. W., Jones, R. L., Peng, H., Hines, D. R., Lee, H.-J., Lin, E. K., Karim, A., Yoon, D. Y., Gidley, D. W., Soles, C. L.

“…Nanoscale parallel line‐space patterns are imprinted into a spin‐on organosilicate thin film that contains a second phase pore generating material (porogen)…”
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Precision measurement of the orthopositronium decay rate using the vacuum technique by NICO, J. S, GIDLEY, D. W, RICH, A, ZITZEWITZ, P. W

“…A focused beam of 700-eV positrons is used to form orthopositronium ({ital o}-Ps) in evacuated, MgO-lined cavities of different sizes. The {ital o}-Ps decay…”
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Direct search for two-photon decay modes of orthopositronium by GIDLEY, D. W, NICO, J. S, SKALSEY, M

“…A direct search for {gamma} rays from the forbidden decay {ital o}-Ps{r arrow}2{gamma} has been performed using the same apparatus that recently measured an…”
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New precision measurement of the orthopositronium decay rate: a discrepancy with theory by WESTBROOK, C. I, GIDLEY, D. W, CONTI, R. S, RICH, A

“…The vacuum decay rate gamma(T) of orthopositronium (o-Ps), formed in a gas, has been measured to be 7.0516 + or - 0.0013/microsec. This result, which is four…”
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Influence of cyclic fatigue on the mechanical properties of amorphous polycarbonate by Li, Xiaowei, Hristov, Hristo A., Yee, Albert F., Gidley, David W.

“…Changes in the mechanical properties of amorphous polycarbonate during the fatigue failure initiation stage lead to overall embrittlement of the polymer. The…”
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Contributions of the nanovoid structure to the kinetics of moisture transport in epoxy resins by Soles, Christopher L., Chang, Fernando T., Gidley, David W., Yee, Albert F.

“…Absorbed moisture can degrade the physical properties of an epoxy resin, jeopardizing the performance of an epoxy‐based component. Although specific…”
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Molecular Templating of Nanoporous Ultralow Dielectric Constant (≈1.5) Organosilicates by Tailoring the Microphase Separation of Triblock Copolymers by Yang, Shu, Mirau, Peter A, Pai, Chien-Shing, Nalamasu, Omkaram, Reichmanis, Elsa, Lin, Eric K, Lee, Hae-Jeong, Gidley, David W, Sun, Jianing

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Contributions of the nanovoid structure to the moisture absorption properties of epoxy resins by Soles, Christopher L., Chang, Fernando T., Bolan, Brett A., Hristov, Hristo A., Gidley, David W., Yee, Albert F.

“…Epoxy resins absorb significant quantities of moisture, typically 1 to 7% by weight for various formulations, which can greatly compromise their physical…”
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Morphological Control of Nanoporous Films by the Use of Functionalized Cyclodextrins as Porogens by Yim, J-H., Seon, J-B., Jeong, H-D., Pu, L. S., Baklanov, M. R., Gidley, D. W.

“…Porous cyclic silsesquioxane (CSSQ) thin films containing nanopores (∼ 2 nm) with low dielectric constant (k < 2.2), have been prepared by using various…”
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Glancing-angle scattering and neutralization of a positron beam at metal surfaces by GIDLEY, D. W, MAYER, R, FRIEZE, W. E, LYNN, K. G

“…An energetic (10-100 eV) beam of Ps was formed by scattering a well-collimated, small-diameter beam of 30-400-eV positrons off surfaces of Al(110) and clean…”
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