Double hydrogen bond mediating self-assembly structure of cyanides on metal surface

2016 ◽  
Vol 499 ◽  
pp. 70-75
Author(s):  
Zhongping Wang ◽  
Feifei Xiang ◽  
Yan Lu ◽  
Sheng Wei ◽  
Chao Li ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Metal Surface ◽  
Self Assembly ◽  
Assembly Structure ◽  
Double Hydrogen

scholarly journals Crystalline modification of a rare earth nucleating agent for isotactic polypropylene based on its self-assembly

2018 ◽  
Vol 5 (5) ◽  
pp. 180247 ◽  
Author(s):  
Yuanming Zhang ◽  
Tingting Sun ◽  
Wei Jiang ◽  
Guangting Han
Keyword(s):  
Hydrogen Bond ◽  
Rare Earth ◽  
Isotactic Polypropylene ◽  
Self Assembly ◽  
Dendritic Structure ◽  
Nucleating Agent ◽  
The Self ◽  
Structure Evolution ◽  
Crystalline Modification ◽  
Assembly Structure

In this paper, the crystalline modification of a rare earth nucleating agent (WBG) for isotactic polypropylene (PP) based on its supramolecular self-assembly was investigated by differential scanning calorimetry, wide-angle X-ray diffraction and polarized optical microscopy. In addition, the relationship between the self-assembly structure of the nucleating agent and the crystalline structure, as well as the possible reason for the self-assembly behaviour, was further studied. The structure evolution of WBG showed that the self-assembly structure changed from a needle-like structure to a dendritic structure with increase in the content of WBG. When the content of WBG exceeded a critical value (0.4 wt%), it self-assembled into a strip structure. This revealed that the structure evolution of WBG contributed to the K β and the crystallization morphology of PP with different content of WBG. In addition, further studies implied that the behaviour of self-assembly was a liquid–solid transformation of WBG, followed by a liquid–liquid phase separation of molten isotactic PP and WBG. The formation of the self-assembly structure was based on the free molecules by hydrogen bond dissociation while being heated, followed by aggregation into another structure by hydrogen bond association while being cooled. Furthermore, self-assembly behaviour depends largely on the interaction between WBG themselves.

High-Fidelity Self-Assembly of Crystalline and Parallel-Oriented Organic Thin Films by π–π Stacking from a Metal Surface

Langmuir ◽  
2014 ◽  
Vol 30 (33) ◽  
pp. 10050-10056 ◽  
Author(s):  
Daniel Skomski ◽  
Junyong Jo ◽  
Christopher D. Tempas ◽  
Seyong Kim ◽  
Dongwhan Lee ◽  
...  
Keyword(s):  
Thin Films ◽  
Metal Surface ◽  
Self Assembly ◽  
Organic Thin Films ◽  
High Fidelity ◽  
Π Stacking

scholarly journals Self-ordered cellulose nanocrystals and microscopic investigations

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
C.F. Castro-Guerrero ◽  
A.B. Morales-Cepeda ◽  
M.R. Díaz-Guillén ◽  
F. Delgado-Arroyo ◽  
F.A. López-González
Keyword(s):  
Cellulose Nanocrystals ◽  
Self Assembly ◽  
Nematic Phase ◽  
Average Length ◽  
Periodic Change ◽  
Local Orientation ◽  
Preferred Direction ◽  
Self Assembling ◽  
Chiral Nematic ◽  
Assembly Structure

Abstract Cellulose nanocrystals were extracted from cotton. The cellulose nanocrystals made a self-assembly structure when dried under slow conditions, as it was revealed by the characterization made to the material. The AFM images of the nanocrystals showed that they had a changing local orientation, pointing in a preferred direction that underwent a periodic change. This periodic change resembles the orientation of a chiral nematic phase. The TEM images showed that the nanocrystals had a rod-like appearance with average length size of 98.5 nm and a diameter of 4.7 nm. The TEM characterization showed the nanocrystals with more details than AFM. In this paper, the self-assembling of CNC was observed by AFM, and further investigations were done by TEM, deconvoluting the process of CNC nanorods aggregation.

Hydrogen bond-driven columnar self-assembly of electroluminescent D–A–D configured cyanopyridones

2018 ◽  
Vol 6 (27) ◽  
pp. 7385-7399 ◽  
Author(s):  
D. R. Vinayakumara ◽  
Hidayath Ulla ◽  
Sandeep Kumar ◽  
Anup Pandith ◽  
M. N. Satyanarayan ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
Optoelectronic Properties

Flying bird-shaped cyanopyridone-based mesogens were designed and synthesized; their optoelectronic properties were studied in detail.

Hydrogen bond mediated self‐assembly of two diblock copolymers

2020 ◽  
Vol 58 (21) ◽  
pp. 3061-3068
Author(s):  
Eric R. Anderson ◽  
Vikram K. Daga ◽  
Samuel P. Gido ◽  
James J. Watkins
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
Diblock Copolymers

Field emission from self-assembly structure of carbon-nanotube films

2005 ◽  
Vol 250 (1-4) ◽  
pp. 9-13 ◽  
Author(s):  
L.M. Sheng ◽  
M. Liu ◽  
P. Liu ◽  
Y. Wei ◽  
L. Liu ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Self Assembly ◽  
Assembly Structure ◽  
Nanotube Films
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