scholarly journals Reentrant Phase Transition in Charged Colloidal Suspensions

1988 ◽  
Vol 60 (23) ◽  
pp. 2438-2441 ◽  
Author(s):  
Akhilesh K. Arora ◽  
B. V. R. Tata ◽  
A. K. Sood ◽  
R. Kesavamoorthy
Keyword(s):  
Phase Transition ◽  
Colloidal Suspensions

Reentrant phase transition in charged colloidal suspensions: A Monte Carlo study

1993 ◽  
Vol 47 (5) ◽  
pp. 3404-3411 ◽  
Author(s):  
B. V. R. Tata ◽  
Akhilesh K. Arora ◽  
M. C. Valsakumar
Keyword(s):  
Phase Transition ◽  
Monte Carlo ◽  
Colloidal Suspensions ◽  
Monte Carlo Study

scholarly journals Reentrant Phase Transition in Charged Colloidal Suspensions

1988 ◽  
Vol 61 (11) ◽  
pp. 1327-1327
Author(s):  
Akhilesh K. Arora ◽  
B. V. V. R. Tata ◽  
A. K. Sood ◽  
R. Kesavamoorthy
Keyword(s):  
Phase Transition ◽  
Colloidal Suspensions

A Study of the Nonlinear Optical Transmittance in a Variety of TCNQ-Based Organometallic Colloidal Suspensions

1997 ◽  
Vol 06 (02) ◽  
pp. 141-150 ◽  
Author(s):  
P. R. Schuster ◽  
C. A. Viands ◽  
R. S. Potember ◽  
M. G. Schmitt
Keyword(s):  
Phase Transition ◽  
Charge Transfer ◽  
Nonlinear Optical ◽  
Charge Transfer Complex ◽  
Colloidal Suspensions ◽  
Optical Transmittance ◽  
Organometallic Complexes ◽  
Nanosecond Pulses ◽  
Organic Acceptor ◽  
532 Nm

Optical limiting in a series of novel aqueous colloidal suspensions is investigated. The suspensions consist of an organometallic charge-transfer complex based on the organic acceptor 7,7,8,8-tetracyanoquinodimethane (TCNQ). We report on the synthesis of the organometallic complexes and their effectiveness at limiting nanosecond pulses at 532 nm. It is shown that some of the charge-transfer systems can effectively attenuate pulses at rates up to 10 Hz while other systems require continuous agitation in order to most efficiently limit the laser radiation. Finally we discuss the reversible field-induced phase transition that produces the observed nonlinear absorption.

Interplay between slow interfacial water diffusion and colloid dynamics: A way to probe colloidal transitions.

2003 ◽  
Vol 790 ◽  
Author(s):  
P.E. Levitz
Keyword(s):  
Fluid Dynamics ◽  
Phase Transition ◽  
Particle Surface ◽  
Low Frequency ◽  
Colloidal Suspensions ◽  
Molecular Structures ◽  
Lyotropic Liquid Crystals ◽  
Water Dynamics ◽  
Colloidal System ◽  
Confined Water

ABSTRACTParticle fluctuations in colloidal suspensions are generally considered to be much slower than the embedded fluid dynamics. It was recently proposed that the fluid self-diffusion nearby an interface follows Lévy statistics, extending the time domain of the fluid dynamics towards the low frequency range. It is then possible to probe colloidal particle motion and especially its evolution during a phase transition looking at the slow dynamics of the fluid molecule close to an particle surface. Using field cycling NMR relaxometry, we show how the slow and confined water dynamics at proximity of a colloidal surface provide an original way to follow the glass transition of a colloidal system made of plate-like Laponite particles, a synthetic clay. The interplay between fluid Levy dynamics and particle jamming is discussed. An analytical model involving correlated elementary water time steps on the colloidal interface is proposed and critically compared to our experimental data. The method permits probing of colloidal motions and especially their evolution during a phase transition in a new way. This method can be extended to other systems including mineral lyotropic liquid crystals and biological molecular structures.

scholarly journals Classification of the reversible–irreversible transitions in particle trajectories across the jamming transition point

Soft Matter ◽  
2019 ◽  
Vol 15 (38) ◽  
pp. 7557-7566 ◽  
Author(s):  
Kentaro Nagasawa ◽  
Kunimasa Miyazaki ◽  
Takeshi Kawasaki
Keyword(s):  
Phase Transition ◽  
Shear Deformation ◽  
Transition Point ◽  
Colloidal Suspensions ◽  
Nonequilibrium Phase Transition ◽  
Particle Trajectories ◽  
Cyclic Shear ◽  
Jamming Transition ◽  
Nonequilibrium Phase

The reversible–irreversible (RI) transition of particle trajectories in athermal colloidal suspensions under cyclic shear deformation is an archetypal nonequilibrium phase transition which has attracted much attention recently.

2D isotropic-nematic transition in colloidal suspensions of ellipsoids

Soft Matter ◽  
2021 ◽  
Author(s):  
Xinlan Tan ◽  
Ya Chen ◽  
Huaguang Wang ◽  
Zexin Zhang ◽  
Xinsheng Sean Ling
Keyword(s):  
Phase Transition ◽  
Liquid Crystals ◽  
Condensed Matter ◽  
Colloidal Suspensions ◽  
Two Dimensional ◽  
Unresolved Issue

Liquid crystals are important condensed matter systems for technological applications, as well as for fundamental studies. An important unresolved issue is the nature of the phase transition in a two-dimensional...

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