Modulating Orientational Order to Organize Polyhedral Nanoparticles into Plastic Crystals and Uniform Metacrystals

2020 ◽  
Vol 59 (47) ◽  
pp. 21183-21189
Author(s):  
Yih Hong Lee ◽  
Wenxiong Shi ◽  
Yijie Yang ◽  
Ya‐Chuan Kao ◽  
Hiang Kwee Lee ◽  
...  
Keyword(s):  
Orientational Order ◽  
Plastic Crystals

THE EFFECT OF MOLECULAR ORIENTATION TO SOLID–SOLID AND MELTING TRANSITIONS

2009 ◽  
Vol 23 (09) ◽  
pp. 1207-1220
Author(s):  
MUSTAFA YAZICI ◽  
ŞÜKRÜ ÖZGAN
Keyword(s):  
Molecular Orientation ◽  
Orientational Order ◽  
Experimental Results ◽  
Plastic Crystals ◽  
Entropy Changes ◽  
Melting Transitions ◽  
D 20 ◽  
Solid Liquid ◽  
Reduced Temperature ◽  
Theoretical Results

The thermodynamics of solid–solid and solid–liquid transitions are investigated with an account of the number of molecular orientation. The variations of the positional and orientational orders with the reduced temperature are studied. It is found out that orientational order parameter is very sensitive to the number of allowed orientation. The reduced transition temperatures, volume changes and entropy changes of the phase transitions and theoretical phase diagrams are obtained. The entropy changes of melting transitions for different numbers of allowed orientation of the present model are compared with the theoretical results and some experimental data. The quantitative predictions of the model are compared with experimental results for plastic crystals and agreement between predictions of the model and the experimental results are approximately good. Also, different numbers of allowed orientation D correspond to different experimental results HI , HBr , H 2 S for D = 2; HBr , CCl 4, HI for D = 4; C 2 H 12 for D = 6; CH 4, PH 3 for D = 20.

Modulating Orientational Order to Organize Polyhedral Nanoparticles into Plastic Crystals and Uniform Metacrystals

2020 ◽  
Vol 132 (47) ◽  
pp. 21369-21375
Author(s):  
Yih Hong Lee ◽  
Wenxiong Shi ◽  
Yijie Yang ◽  
Ya‐Chuan Kao ◽  
Hiang Kwee Lee ◽  
...  
Keyword(s):  
Orientational Order ◽  
Plastic Crystals

Orientational order in two‐component plastic crystals 2,2‐dichloropropane–carbon tetrachloride

1991 ◽  
Vol 95 (1) ◽  
pp. 22-27 ◽  
Author(s):  
M. N. Akimov ◽  
O. F. Bezrukov ◽  
O. V. Chikunov ◽  
A. V. Struts
Keyword(s):  
Carbon Tetrachloride ◽  
Orientational Order ◽  
Plastic Crystals ◽  
Two Component

Polymorphism of crystalline tert-butyl chloride-d0 and tert-butyl chloride-d9: a Raman spectroscopic study

1979 ◽  
Vol 57 (8) ◽  
pp. 846-852 ◽  
Author(s):  
S. Sunder
Keyword(s):  
Orientational Order ◽  
Phase Iii ◽  
Molecular Symmetry ◽  
Ordered Structure ◽  
Butyl Chloride ◽  
Plastic Crystals ◽  
Raman Spectroscopic ◽  
Tert Butyl ◽  
Intramolecular Vibrations ◽  
Tert Butyl Chloride

Raman spectra of the three solid phases of tert-butyl chloride-d0 and -d9 have been recorded for the regions of the intramolecular vibrations. The spectra of solid I are typical of those seen for plastic crystals and those of solid II of solids with partial orientational order. The transition from solid I to solid II results in the ordering of the three-fold molecular symmetry axes but the axes perpendicular to the molecular symmetry axes remain randomly oriented. The transition from solid II to III results in a more-or-less ordered structure. The spectra of phase III at 90 K suggest an ordered solid with the molecules on sites of symmetry Cs or C1.

Bond-orientational order in liquid aluminium80-transition metal20 alloys

1993 ◽  
Vol 3 (8) ◽  
pp. 1873-1888 ◽  
Author(s):  
M. Maret ◽  
F. Lançon ◽  
L. Billard
Keyword(s):  
Orientational Order ◽  
Bond Orientational Order
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