Q2. What are the future works in "Simulating mesoscopic order" ?
However, in the near future, such simulations may play a crucial role in designing materials with taylor-made mesoscopic order.
Q3. What is the effect of freezing on the rest of the universe?
the authors also gain entropy, because a molecule has more free volume to move in this cell than it had in the fluid; in other words, there is more jamming of molecules in a dense fluid than in a solid of the same density.
Q4. What is the important question that Xu and Baus ask?
In their paper, Xu and Baus use classical density-functional theory, i.e., the best analytical theory of freezing to date, to estimate the stability of the ABI3 phase in a mixture of large and small hard spheres.
Q5. What is the second law of thermodynamics?
Their intuitive notion about order and disorder suggests that a system with a given density and energy should have a higher entropy in the fluid phase than in the crystalline phase, and that freezing would result in a decrease of entropy.
Q6. What is the meaning of the passage?
When this happens, entropy will favour crystallization: an increase in macroscopic order is driven by an increase of microscopic disorder.
Q7. What is the density of the AB13 structure?
Their calculations confirm that, for a size ratio of 0.58, there is a density range where the AB13 structure is more stable than the fluid mixture, the pure A and B solids or the AB 2 compound.
Q8. What is the reason why the hard-sphere freezing transition was first reported?
This unsophisticated description of the thermodynamics of freezing explains why, for a long time, it was commonly thought that attractive forces between molecules are essential for crystallization: a crystal can form because the lowering of the potential energy of the system upon solidification pays the price for the decrease in entropy.
Q9. What is the kinetics of the AB13 structure?
In fact, the experimental evidence strongly suggests that kinetic factors play an impor tan t role in determining which phase actually forms.
Q10. What is the definition of a naive picture of a solid?
in retrospect, the authors can understand the hardsphere freezing as follows: a naive picture of a solid is a cell model in which all molecules are confined to cells centered around lattice sites.
Q11. What is the entropy of the ABI3 structure?
In the words of Xu and Baus " . . . t h e larger entropy of mixing of the ABI3 structure relative to that of the competing structures is responsible for its stability".
Q12. What is the important question that can be answered?
In fact, the results of an extensive numerical study by E1dridge et al. [6] indicate that entropy alone can indeed account for the stability of the AB13 structure.
Q13. What is the reason why the AB3 structure is more stable than the pure A and B?
In fact, both the pure A and B phases and the AB 2 structure can fill space more efficiently, and hence the free volume would favour those phases over ABe3.
Q14. What is the main point of the article?
In summary, simulations of order ing in mesoscopic systems are, at present, still very much a technique to increase their fundamenta l unders tanding of the statistical mechanics of order-disorder transitions.