Step-wise kinetics of natural physical ageing in arsenic selenide glasses

Golovchak, R.; Kozdraś, A.; Balitska, V.; Shpotyuk, O.

doi:10.1088/0953-8984/24/50/505106

Cited by 63 publications

(82 citation statements)

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“…In thin films, this can be done in experimental time scales considerably shorter than those normally needed for bulk glass formers. Apart from this, it is interesting to notice that bulk glasses below the T g (determined at cooling rates typical of standard DSC; for instance, 10 K/min) exhibits complex behaviour, with several minima in the energy landscape [11,20,47]. Several equilibration mechanisms exist as a consequence.…”

Section: Discussionmentioning

confidence: 99%

“…Several equilibration mechanisms exist as a consequence. However, in the case of bulk glass formers, the experimental time scales involved in those experiments showing the presence of multiple relaxation steps are of the order of years [20,47]. Given their behaviour, one can expect that this time scale would significantly decrease in the case of this films.…”

Section: Discussionmentioning

confidence: 99%

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Cooling Rate Dependent Glass Transition in Thin Polymer Films and in Bulk

Cangialosi

Alegría

Colmenero

2016

Fast Scanning Calorimetry

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Polymers confined at the nanoscale are assuming increasing importance in a wide range of applications where miniaturization is required [25,78,85,121,122]. The technological interest on polymers confined at the nanoscale has generated intense research in an attempt of understanding how properties are modified by the presence of the polymer/external world interface. Due to the large area of such interface to volume of polymer ratio, these can dramatically deviate from those of the corresponding bulk system. Among the aspects that have recently received considerable attention, the study of glassy dynamics in nanoscale confinement is certainly

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Cooling Rate Dependent Glass Transition in Thin Polymer Films and in Bulk

Cangialosi

Alegría

Colmenero

2016

Fast Scanning Calorimetry

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“…More on the TNM model limitations can be found e.g. in [37][38][39][40][41][42], where several attempts for improvement of relaxation phenomenology can also be found. Nevertheless, the TNM model is considered a standard in the field of structural relaxation; thus, all theoretical curves shown in this work were calculated using TNM model without any extensions.…”

Section: Discussionmentioning

confidence: 99%

Enthalpy relaxation of selenium observed by fast scanning calorimetry

et al. 2015

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“…More references and examples on the TNM model limitations can be found in Refs. [183,184,185,186,187].…”

Section: Limitationsmentioning

confidence: 99%

Relaxation and physical aging in network glasses: a review

Micoulaut

2016

Rep. Prog. Phys.

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Abstract. Recent progresses in the description of glassy relaxation and ageing are reviewed for the wide class of network-forming materials such as GeO 2 , Ge x Se 1−x , silicates (SiO 2 -Na 2 O) or borates (B 2 O 3 -Li 2 O), all of them having an important usefulness in domestic, geological or optoelectronic applications. A brief introduction of the glass transition phenomenology is given, together with the salient features that are revealed both from theory and experiments. Standard experimental methods used for the characterization of the slowing down of the dynamics are reviewed. We then discuss the important role played by aspect of network topology and rigidity for the understanding of the relaxation of the glass transition, while also permitting analytical predictions of glass properties from simple and insightful models based on the network structure. We also emphasize the great utility of computer simulations which probe the dynamics at the molecular level, and permit to calculate various structure-related functions in connection with glassy relaxation and the physics of ageing which reveals the off-equilibrium nature of glasses. We discuss the notion of spatial variations of structure which leads to the picture of "dynamic heterogeneities", and recent results of this important topic for network glasses are also reviewed.PACS numbers: 61.43. Fs, 64.70.kj Relaxation and physical ageing in network glasses 2 Figure 1. Typical network-forming glasses: a) A stoichiometric glass former (SiO 2 , B 2 S 3 ) whose structure and network connectivity can be altered by the addition (b) of 2-fold coordinated atoms (usually chalcogens, S, Se) that lead to cross-linked chains. The structure can also be depolymerized (c) by the addition of a network modifier (alkali oxides or chalcogenides, Na 2 O, Li 2 S, etc.). Glassy dynamics depends strongly on the network topology, i.e. the way bonds and angles arrange to lead to a connected atomic network. Note that only chalcogenides can produce a mixture of these three kinds of basic networks, e.g. (1-x)Ge y Se 1−y -xAg 2 Se [2], and for the latter system x=0 corresponds to case (b), y=33% corresponds to case (c), and both conditions together (x=0,y=33 %) to case (a).

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Step-wise kinetics of natural physical ageing in arsenic selenide glasses

Cited by 63 publications

References 50 publications

Cooling Rate Dependent Glass Transition in Thin Polymer Films and in Bulk

Cooling Rate Dependent Glass Transition in Thin Polymer Films and in Bulk

Enthalpy relaxation of selenium observed by fast scanning calorimetry

Relaxation and physical aging in network glasses: a review

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