INVESTIGADORES
APPIGNANESI Gustavo Adrian
artículos
Título:
?Experimental verification of rapid, sporadic particle motions by direct imaging of glassy colloidal systems?
Autor/es:
J. A. RODRÍGUEZ FRIS; G. A. APPIGNANESI ; E.R. WEEKS
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2011 vol. 107 p. 65704 - 65707
ISSN:
0031-9007
Resumen:
We analyze data from confocal microscopy experiments of a colloidal suspension to validate
predictions of rapid sporadic events responsible for structural relaxation in a glassy sample. The
trajectories of several thousand colloidal particles are analyzed, confirming the existence of such rapid
events responsible for the structural relaxation of significant regions of the sample, and complementing
prior observations of dynamical heterogeneity. Thus, our results provide the first direct experimental
verification of the emergence of relatively compact clusters of mobility which allow the dynamics to
transition between the large periods of local confinement within its potential energy surface, in good
agreement with the picture envisioned long ago by Adam and Gibbs and Goldstein.