PMID- 25119444
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20150413
LR  - 20140814
IS  - 2041-1723 (Electronic)
IS  - 2041-1723 (Linking)
VI  - 5
DP  - 2014 Aug 14
TI  - Growing dynamical facilitation on approaching the random pinning colloidal glass 
      transition.
PG  - 4685
LID - 10.1038/ncomms5685 [doi]
AB  - Despite decades of research, it remains to be established whether the 
      transformation of a liquid into a glass is fundamentally thermodynamic or dynamic 
      in origin. Although observations of growing length scales are consistent with 
      thermodynamic perspectives, the purely dynamic approach of the Dynamical 
      Facilitation (DF) theory lacks experimental support. Further, for vitrification 
      induced by randomly freezing a subset of particles in the liquid phase, 
      simulations support the existence of an underlying thermodynamic phase 
      transition, whereas the DF theory remains unexplored. Here, using video 
      microscopy and holographic optical tweezers, we show that DF in a colloidal 
      glass-forming liquid grows with density as well as the fraction of pinned 
      particles. In addition, we observe that heterogeneous dynamics in the form of 
      string-like cooperative motion emerges naturally within the framework of 
      facilitation. Our findings suggest that a deeper understanding of the glass 
      transition necessitates an amalgamation of existing theoretical approaches.
FAU - Gokhale, Shreyas
AU  - Gokhale S
AD  - 1] Department of Physics, Indian Institute of Science, Bangalore 560012, India 
      [2].
FAU - Hima Nagamanasa, K
AU  - Hima Nagamanasa K
AD  - 1] Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced 
      Scientific Research, Jakkur, Bangalore 560064, India [2].
FAU - Ganapathy, Rajesh
AU  - Ganapathy R
AD  - International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced 
      Scientific Research, Jakkur, Bangalore 560064, India.
FAU - Sood, A K
AU  - Sood AK
AD  - 1] Department of Physics, Indian Institute of Science, Bangalore 560012, India 
      [2] International Centre for Materials Science, Jawaharlal Nehru Centre for 
      Advanced Scientific Research, Jakkur, Bangalore 560064, India.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20140814
PL  - England
TA  - Nat Commun
JT  - Nature communications
JID - 101528555
EDAT- 2014/08/15 06:00
MHDA- 2014/08/15 06:01
CRDT- 2014/08/15 06:00
PHST- 2014/03/17 00:00 [received]
PHST- 2014/07/14 00:00 [accepted]
PHST- 2014/08/15 06:00 [entrez]
PHST- 2014/08/15 06:00 [pubmed]
PHST- 2014/08/15 06:01 [medline]
AID - ncomms5685 [pii]
AID - 10.1038/ncomms5685 [doi]
PST - epublish
SO  - Nat Commun. 2014 Aug 14;5:4685. doi: 10.1038/ncomms5685.