Self-Organization of Low-Symmetry Adjacent-type Metallophthalocyanines Having Branched Alkyl Chains

Langmuir ◽  
2006 ◽  
Vol 22 (11) ◽  
pp. 5051-5056 ◽  
Author(s):  
Mutsumi Kimura ◽  
Hiroyuki Ueki ◽  
Kazuchika Ohta ◽  
Hirofusa Shirai ◽  
Nagao Kobayashi
Keyword(s):  
Self Organization ◽  
Alkyl Chains ◽  
Low Symmetry

Hexabenzocoronene with Swallow-Tailed Substitutes: Synthesis, Characterization and Properties

2011 ◽  
Vol 181-182 ◽  
pp. 147-150 ◽  
Author(s):  
Wen Qing Huang ◽  
Pei Pei Liu ◽  
Bing Bing Wang ◽  
Xu Ying Liu ◽  
Wen Guang Wang
Keyword(s):  
Differential Scanning Calorimetry ◽  
Thermal Properties ◽  
Optical Microscopy ◽  
Thermal Processing ◽  
Self Organization ◽  
Side Chains ◽  
Scanning Calorimetry ◽  
Polarized Optical Microscopy ◽  
Alkyl Chains

A hexa-peri-hexabenzocoronene (HBC) derivative, substituted at periphery by six swallow-tailed alkyl chains containing ether linkages, has been synthesized. Its thermal properties and self-organization were investigated using differential scanning calorimetry (DSC) and polarized optical microscopy (POM). Results showed that the peripheral side chains substituted to the aromatic core could lead the HBC to a dramatically lowered isotropization temperature compared with those reported previously, allowing thermal processing at practical temperatures.

Ordered structures of alkylated carbon dots and their applications in nonlinear optics

2020 ◽  
Vol 8 (26) ◽  
pp. 8980-8991 ◽  
Author(s):  
Keyang Yin ◽  
Dandan Lu ◽  
Wendong Tian ◽  
Rui Zhang ◽  
Haohai Yu ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Carbon Dots ◽  
Nonlinear Optical ◽  
Self Organization ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Ordered Structures ◽  
Alkyl Chains ◽  
Potential Applications ◽  
Film State

C dots with peripheral alkyl chains have been prepared, which undergo self-organization in the solvent-free state. A nonlinear optical response with reverse saturable absorption behavior has been found in the film state, which opens the door for potential applications in laser protection.

Use of 2½ D imaging in analysis of NiTi martensite

1978 ◽  
Vol 36 (1) ◽  
pp. 610-611
Author(s):  
G. M. Michal
Keyword(s):  
Memory Effect ◽  
Monoclinic Phase ◽  
Reaction Path ◽  
Structural Characteristics ◽  
Salient Feature ◽  
Martensite Phase ◽  
Orientation Relationships ◽  
Low Symmetry ◽  
Hydride Phases ◽  
Unusual Shape

Several TEM investigations have attempted to correlate the structural characteristics to the unusual shape memory effect in NiTi, the consensus being the essence of the memory effect is ostensible manifest in the structure of NiTi transforming martensitic- ally from a B2 ordered lattice to a low temperature monoclinic phase. Commensurate with the low symmetry of the martensite phase, many variants may form from the B2 lattice explaining the very complex transformed microstructure. The microstructure may also be complicated by the enhanced formation of oxide or hydride phases and precipitation of intermetallic compounds by electron beam exposure. Variants are typically found in selfaccommodation groups with members of a group internally twinned and the twins themselves are often observed to be internally twinned. Often the most salient feature of a group of variants is their close clustering around a given orientation. Analysis of such orientation relationships may be a key to determining the nature of the reaction path that gives the transformation its apparently perfect reversibility.

The usefulness of high index low symmetry zone axes for holz line analysis

1987 ◽  
Vol 45 ◽  
pp. 384-385
Author(s):  
C. M. Sung ◽  
D. B. Williams
Keyword(s):  
Lattice Parameter ◽  
High Order ◽  
Zone Axis ◽  
High Index ◽  
High Symmetry ◽  
Second Phases ◽  
Line Patterns ◽  
Low Symmetry ◽  
Line Analysis

Researchers have tended to use high symmetry zone axes (e.g. <111> <114>) for High Order Laue Zone (HOLZ) line analysis since Jones et al reported the origin of HOLZ lines and described some of their applications. But it is not always easy to find HOLZ lines from a specific high symmetry zone axis during microscope operation, especially from second phases on a scale of tens of nanometers. Therefore it would be very convenient if we can use HOLZ lines from low symmetry zone axes and simulate these patterns in order to measure lattice parameter changes through HOLZ line shifts. HOLZ patterns of high index low symmetry zone axes are shown in Fig. 1, which were obtained from pure Al at -186°C using a double tilt cooling holder. Their corresponding simulated HOLZ line patterns are shown along with ten other low symmetry orientations in Fig. 2. The simulations were based upon kinematical diffraction conditions.

Strain measurement by means of bend contour microscopy

1989 ◽  
Vol 47 ◽  
pp. 210-211
Author(s):  
Philip D. Hren
Keyword(s):  
Strain Measurement ◽  
Large Angle ◽  
Single Crystal Silicon ◽  
Convergent Beam Electron Diffraction ◽  
Zone Axis ◽  
Silicon Membrane ◽  
Crystal Silicon ◽  
Contour Pattern ◽  
Convergent Beam ◽  
Low Symmetry

The pattern of bend contours which appear in the TEM image of a bent or curled sample indicates the shape into which the specimen is bent. Several authors have characterized the shape of their bent foils by this method, most recently I. Bolotov, as well as G. Möllenstedt and O. Rang in the early 1950’s. However, the samples they considered were viewed at orientations away from a zone axis, or at zone axes of low symmetry, so that dynamical interactions between the bend contours did not occur. Their calculations were thus based on purely geometric arguments. In this paper bend contours are used to measure deflections of a single-crystal silicon membrane at the (111) zone axis, where there are strong dynamical effects. Features in the bend contour pattern are identified and associated with a particular angle of bending of the membrane by reference to large-angle convergent-beam electron diffraction (LACBED) patterns.

Review of Self-Organization and Clinical Psychology.

1994 ◽  
Vol 39 (9) ◽  
pp. 916-916
Author(s):  
Terri Gullickson
Keyword(s):  
Clinical Psychology ◽  
Self Organization
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