Structural Rearrangements That Govern Flow in Colloidal Glasses

by: Peter Schall, David A Weitz, Frans Spaepen

Science, Vol. 318, No. 5858. (21 December 2007), pp. 1895-1899.

View FullText article

DOI, HighWire, Pubmed, Hubmed

Reviews [Write a review of this article]

There are no reviews of this article

Find related articles from these CiteULike users

softsimu, dchen, weeks

Find related articles with these CiteULike tags

colloids, confocal, diffusion, flow, glasses, schall, shear, shearband, stz, weitz

摘要

Structural rearrangements are an essential property of atomic and molecular glasses; they are critical in controlling resistance to flow and are central to the evolution of many properties of glasses, such as their heat capacity and dielectric constant. Despite their importance, these rearrangements cannot directly be visualized in atomic glasses. We used a colloidal glass to obtain direct three-dimensional images of thermally induced structural rearrangements in the presence of an applied shear. We identified localized irreversible shear transformation zones and determined their formation energy and topology. A transformation favored successive ones in its vicinity. Using continuum models, we elucidated the interplay between applied strain and thermal fluctuations that governs the formation of these zones in both colloidal and molecular glasses. 10.1126/science.1149308

@article{schall07, abstract = {Structural rearrangements are an essential property of atomic and molecular glasses; they are critical in controlling resistance to flow and are central to the evolution of many properties of glasses, such as their heat capacity and dielectric constant. Despite their importance, these rearrangements cannot directly be visualized in atomic glasses. We used a colloidal glass to obtain direct three-dimensional images of thermally induced structural rearrangements in the presence of an applied shear. We identified localized irreversible shear transformation zones and determined their formation energy and topology. A transformation favored successive ones in its vicinity. Using continuum models, we elucidated the interplay between applied strain and thermal fluctuations that governs the formation of these zones in both colloidal and molecular glasses. 10.1126/science.1149308}, author = {Schall, Peter and Weitz, David A. and Spaepen, Frans }, citeulike-article-id = {2453811}, doi = {http://dx.doi.org/10.1126/science.1149308}, journal = {Science}, keywords = {colloids, confocal, shear, stz}, month = {December}, number = {5858}, pages = {1895--1899}, posted-at = {2008-06-21 23:47:52}, priority = {5}, title = {Structural Rearrangements That Govern Flow in Colloidal Glasses}, url = {http://dx.doi.org/10.1126/science.1149308}, volume = {318}, year = {2007} }

RIS record

TY - JOUR ID - schall07 L3 - citeulike-article-id:2453811 N2 - Structural rearrangements are an essential property of atomic and molecular glasses; they are critical in controlling resistance to flow and are central to the evolution of many properties of glasses, such as their heat capacity and dielectric constant. Despite their importance, these rearrangements cannot directly be visualized in atomic glasses. We used a colloidal glass to obtain direct three-dimensional images of thermally induced structural rearrangements in the presence of an applied shear. We identified localized irreversible shear transformation zones and determined their formation energy and topology. A transformation favored successive ones in its vicinity. Using continuum models, we elucidated the interplay between applied strain and thermal fluctuations that governs the formation of these zones in both colloidal and molecular glasses. 10.1126/science.1149308 IS - 5858 JF - Science EP - 1899 TI - Structural Rearrangements That Govern Flow in Colloidal Glasses VL - 318 SP - 1895 KW - colloids KW - confocal KW - shear KW - stz AU - Schall, Peter AU - Weitz, David AU - Spaepen, Frans PY - 2007/12/21/ UR - http://dx.doi.org/10.1126/science.1149308 ER -

RIS BibTeX