Título:
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Accelerated aging in ultrathin films of a molecular glass former
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Autor/a:
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Sepúlveda Márquez, Alfonso; León Gutierrez, Edgar; González Silveira, Marta; Rodríguez Tinoco, Cristian; Clavaguera-Mora, M. T.; Rodríguez-Viejo, Javier; American Physical Society
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Abstract:
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We report the thermodynamic measurement of the enthalpy released during the aging of supported films of a molecular glass former, toluene, at temperatures well below the glass transition temperature. By using microfabricated devices with very short equilibration times (below 1 s), we evidence a remarkable variation of the relaxation rate on decreasing film thickness from 100 nm down to a 7 nm thick film. Our results demonstrate that surface atoms are more efficient than bulk atoms in attaining low energy configurations within the potential energy landscape. |
Derechos:
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open access
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Tipo de documento:
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Article |
Editor:
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Compartir:
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Uri:
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https://ddd.uab.cat/record/114176
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