Bibliografías temáticas / Johari-Goldstein relaxation

Literatura académica sobre el tema "Johari-Goldstein relaxation"

Autor: Grafiati
Publicado: 11 de marzo de 2023

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Artículos de revistas sobre el tema "Johari-Goldstein relaxation"

1

Thayyil, M. Shahin, S. Capaccioli, D. Prevosto y K. L. Ngai. "Is the Johari-Goldstein β-relaxation universal?" Philosophical Magazine 88, n.º 33-35 (21 de noviembre de 2008): 4007–13. http://dx.doi.org/10.1080/14786430802270082.

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Capaccioli, S., K. L. Ngai y N. Shinyashiki. "The Johari−Goldstein β-Relaxation of Water". Journal of Physical Chemistry B 111, n.º 28 (julio de 2007): 8197–209. http://dx.doi.org/10.1021/jp071857m.

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3

Cicerone, Marcus T. y Madhusudan Tyagi. "Metabasin transitions are Johari-Goldstein relaxation events". Journal of Chemical Physics 146, n.º 5 (7 de febrero de 2017): 054502. http://dx.doi.org/10.1063/1.4973935.

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HILFER, R. "ON FRACTIONAL RELAXATION". Fractals 11, supp01 (febrero de 2003): 251–57. http://dx.doi.org/10.1142/s0218348x03001914.

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Generalized fractional relaxation equations based on generalized Riemann-Liouville derivatives are combined with a simple short time regularization and solved exactly. The solution involves generalized Mittag-Leffler functions. The associated frequency dependent susceptibilities are related to symmetrically broadened Cole-Cole susceptibilities occurring as Johari Goldstein β-relaxation in many glass formers. The generalized susceptibilities exhibit a high frequency wing and strong minimum enhancement.
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5

Redondo-Foj, Belén, María Jesús Sanchis, Pilar Ortiz-Serna, Marta Carsí, José Miguel García y Félix Clemente García. "The effect of cross-linking on the molecular dynamics of the segmental and β Johari–Goldstein processes in polyvinylpyrrolidone-based copolymers". Soft Matter 11, n.º 36 (2015): 7171–80. http://dx.doi.org/10.1039/c5sm00714c.

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The cross-linking effect on the molecular dynamics of vinylpyrrolidone (VP)/butyl acrylate (BA) copolymers is reflected in the α process, but more significantly in the β Johari–Goldstein (JG) relaxation.
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6

Kaminski, K., E. Kaminska, M. Paluch, J. Ziolo y K. L. Ngai. "The True Johari−Goldstein β-Relaxation of Monosaccharides". Journal of Physical Chemistry B 110, n.º 49 (diciembre de 2006): 25045–49. http://dx.doi.org/10.1021/jp064710o.

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7

Massa, Carlo Andrea, Francesco Puosi y Dino Leporini. "Fractional Coupling of Primary and Johari–Goldstein Relaxations in a Model Polymer". Polymers 14, n.º 24 (19 de diciembre de 2022): 5560. http://dx.doi.org/10.3390/polym14245560.

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A polymer model exhibiting heterogeneous Johari–Goldstein (JG) secondary relaxation is studied by extensive molecular-dynamics simulations of states with different temperature and pressure. Time–temperature–pressure superposition of the primary (segmental) relaxation is evidenced. The time scales of the primary and the JG relaxations are found to be highly correlated according to a power law. The finding agrees with key predictions of the Coupling Model (CM) accounting for the decay in a correlation function due to the relaxation and diffusion of interacting systems. Nonetheless, the exponent of the power law, even if it is found in the range predicted by CM (0<ξ<1), deviates from the expected one. It is suggested that the deviation could depend on the particular relaxation process involved in the correlation function and the heterogeneity of the JG process.
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8

Ngai, K. L. y M. Beiner. "Secondary Relaxation of the Johari−Goldstein Kind in Alkyl Nanodomains". Macromolecules 37, n.º 21 (octubre de 2004): 8123–27. http://dx.doi.org/10.1021/ma048645x.

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9

Ngai, K. L., S. Pawlus, K. Grzybowska, K. Kaminski, S. Capaccioli y M. Paluch. "Does the Johari–Goldstein β-Relaxation Exist in Polypropylene Glycols?" Macromolecules 48, n.º 12 (12 de junio de 2015): 4151–57. http://dx.doi.org/10.1021/acs.macromol.5b00832.

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10

Goldstein, Martin. "The past, present, and future of the Johari–Goldstein relaxation". Journal of Non-Crystalline Solids 357, n.º 2 (enero de 2011): 249–50. http://dx.doi.org/10.1016/j.jnoncrysol.2010.05.105.

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Tesis sobre el tema "Johari-Goldstein relaxation"

1

Caporaletti, Federico. "Atomic dynamics in glass-forming liquids during the Johari-Goldstein relaxation". Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/263839.

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When a liquid is cooled to produce a glass, its dynamics, dominated by the structural relaxation, slows down dramatically, becoming of ≈100 s at the glass-transition temperature, Tg. At a slightly higher temperature (≈1.2Tg), a second, faster process, known as Johari-Goldstein (βJG) decouples from the structural one and remains active even in the glassy-state. It is nowadays established that the βJG -process is deeply connected to the structural one, though its microscopic origin and its role in the glass transition are still under debate. In this Thesis the spatial and temporal properties of the atomic motions within the JG-relaxation are investigated in two mono-hydroxyl alcohols using the technique known as nuclear γ-resonance time-domain interferometry (TDI). The results here obtained show that, within the βJ-relaxation, about one molecule out of four undergoes a restricted dynamics characterized by displacements of the order of 10% of the average inter-molecular distance. These re-arrangements correspond to local cage-breaking events and such un-caged molecules form a percolating cluster within the sample. At the same time we also found evidences of larger re-arrangements, occurring at a longer timescale with respect to the cage-breaking events and reaching out at least to the inter-molecular length-scale.
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2

Caporaletti, Federico. "Atomic dynamics in glass-forming liquids during the Johari-Goldstein relaxation". Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/263839.

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When a liquid is cooled to produce a glass, its dynamics, dominated by the structural relaxation, slows down dramatically, becoming of ≈100 s at the glass-transition temperature, Tg. At a slightly higher temperature (≈1.2Tg), a second, faster process, known as Johari-Goldstein (βJG) decouples from the structural one and remains active even in the glassy-state. It is nowadays established that the βJG -process is deeply connected to the structural one, though its microscopic origin and its role in the glass transition are still under debate. In this Thesis the spatial and temporal properties of the atomic motions within the JG-relaxation are investigated in two mono-hydroxyl alcohols using the technique known as nuclear γ-resonance time-domain interferometry (TDI). The results here obtained show that, within the βJ-relaxation, about one molecule out of four undergoes a restricted dynamics characterized by displacements of the order of 10% of the average inter-molecular distance. These re-arrangements correspond to local cage-breaking events and such un-caged molecules form a percolating cluster within the sample. At the same time we also found evidences of larger re-arrangements, occurring at a longer timescale with respect to the cage-breaking events and reaching out at least to the inter-molecular length-scale.
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Actas de conferencias sobre el tema "Johari-Goldstein relaxation"

1

Ngai, K. L. "Johari-Goldstein Or Primitive Relaxation: Terminator Of Caged Dynamics And Precursor Of α-Relaxation". En SLOW DYNAMICS IN COMPLEX SYSTEMS: 3rd International Symposium on Slow Dynamics in Complex Systems. AIP, 2004. http://dx.doi.org/10.1063/1.1764218.

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2

Ngai, K. L., S. Capaccioli y M. Paluch. "Relations of pressure and temperature dependences of the Johari-Goldstein β-relaxation to the α-relaxation: Amorphous polymers". En 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2018. http://dx.doi.org/10.1063/1.5045865.

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3

Roland, C. M. "Johari-Goldstein Relaxations during Physical Aging of Propylene Glycol Oligomers under High Pressure". En SLOW DYNAMICS IN COMPLEX SYSTEMS: 3rd International Symposium on Slow Dynamics in Complex Systems. AIP, 2004. http://dx.doi.org/10.1063/1.1764219.

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