High aspect ratio, processable coordination polymer gel nanotubes based on an AIE-active LMWG with tunable emission

2015 ◽  
Vol 51 (78) ◽  
pp. 14678-14681 ◽  
Author(s):  
Venkata M. Suresh ◽  
Anangsha De ◽  
Tapas Kumar Maji
Keyword(s):  
Coordination Polymer ◽  
Aspect Ratio ◽  
Metal Ions ◽  
High Aspect Ratio ◽  
Self Assembly ◽  
Blue Emission ◽  
The Other ◽  
Polymer Gel ◽  
Strong Blue Emission ◽  
Tunable Emission

Self-assembly of a rationally designed AIE active LMWG, driven by intermolecular H-bonding, forms 1D nanofibers with strong cyan emission due to AIE properties of the TPE core. On the other hand, addition of metal ions results in the formation of nanotubular structures with strong blue emission in the gel state due to AIE and MCIE.

Cooperative Self-Assembly of Pyridine-2,6-Diimine-Linked Macrocycles into Mechanically Robust Nanotubes

2019 ◽  
Author(s):  
Michael J. Strauss ◽  
Darya Asheghali ◽  
Austin Evans ◽  
Rebecca Li ◽  
Anton Chavez ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Self Assembly ◽  
Gel Permeation Chromatography ◽  
Synthetic Polymers ◽  
Young’S Moduli ◽  
Structural Rigidity ◽  
Assembly Mechanism ◽  
Low Dimensionality ◽  
Harsh Conditions

<p>Nanotubes assembled from macrocyclic precursors offer a unique combination of low dimensionality, structural rigidity, and distinct interior and exterior microenvironments. Usually the weak stacking energies of macrocycles limit the length or strength of the resultant nanotubes. Imine-linked macrocycles were recently found to assemble into high-aspect ratio (>10<sup>3</sup>), lyotropic nanotubes in the presence of excess acid. Yet these harsh conditions are incompatible with many functional groups and processing methods, and lower acid loadings instead catalyze macrocycle degradation. Here we report pyridine-2,6-diimine-linked macrocycles that assemble into high-aspect ratio nanotubes in the presence of less than 1 equiv of CF<sub>3</sub>CO<sub>2</sub>H per macrocycle. Analysis by gel permeation chromatography and fluorescence spectroscopy revealed a cooperative self-assembly mechanism. Nanofibers obtained by touch-spinning the pyridinium-based nanotubes exhibit Young’s moduli of 1.48 GPa, which exceeds that of many synthetic polymers and biological filaments. These findings will enable the design of structurally diverse nanotubes from synthetically accessible macrocycles. </p>

Photopolymerization-assisted self-assembly as a strategy to obtain a dispersion of very high aspect ratio nanostructures in a polystyrene matrix

2019 ◽  
Vol 112 ◽  
pp. 704-713 ◽  
Author(s):  
Ú.M. Montoya Rojo ◽  
C.C. Riccardi ◽  
M.D. Ninago ◽  
A.E. Ciolino ◽  
M.A. Villar ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Self Assembly ◽  
Polystyrene Matrix ◽  
Very High

scholarly journals High-aspect-ratio mushroom-like silica nanopillars immersed in air: epsilon-near-zero metamaterials mediated by a phonon-polaritonic anisotropy

RSC Advances ◽  
2019 ◽  
Vol 9 (29) ◽  
pp. 16431-16438
Author(s):  
Kota Ito ◽  
Yuri Yamada ◽  
Atsushi Miura ◽  
Hideo Iizuka
Keyword(s):  
Block Copolymers ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Self Assembly ◽  
Infrared Range ◽  
Mid Infrared ◽  
Zero Response ◽  
Epsilon Near Zero

High-aspect-ratio mushroom-like silica nanopillars fabricated from self-assembly of block-copolymers exhibit a uniaxial epsilon-near-zero response in the mid-infrared range.

[Na8Zn4(CH3CO2)16·2H2O]n: two-dimensional sheet-like coordination polymer with strong blue emission

2002 ◽  
Vol 5 (5) ◽  
pp. 361-365 ◽  
Author(s):  
Lei Z. Zhang ◽  
Peng Cheng ◽  
Wei Shi ◽  
Dai-Zheng Liao ◽  
Ying Xiong ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Blue Emission ◽  
Two Dimensional ◽  
Strong Blue Emission

On the Pressure Distribution Round Certain Aerofoils of High Aspect Ratio

1926 ◽  
Vol 30 (182) ◽  
pp. 129-141
Author(s):  
D. M. Wrinch
Keyword(s):  
Aspect Ratio ◽  
Cross Section ◽  
High Aspect Ratio ◽  
Special Interest ◽  
Cylindrical Body ◽  
The Body ◽  
The Other ◽  
Two Dimensional ◽  
Reasonable Accuracy ◽  
Lifting Force

The development of aerodynamical research into the usefulness of wing profiles of various types for aerofoils of high aspect ratio lends special interest to new results in two-dimensional hydrodynamics relating to the motion of a perfect fluid in the presence of a cylindrical body, especially in the case when the curve of cross-section of the body possesses only a smali amount of camber and is cusped at one end and rounded at the other.The possibility of formulating a theory which represents with reasonable accuracy the actual motions of aerofoils of high aspect ratio in a stream of air, when the air it taken to be inviscid, depends, of course, essentially in the first place on finding motions in which there is a force on the body at right angles to the direction of streaming. No theory which omits to produce this lifting force can give an account of the actual motions of aerofoils which is even approximately satisfactory.

Cooperative Self-Assembly of Pyridine-2,6-Diimine-Linked Macrocycles into Mechanically Robust Nanotubes

2019 ◽  
Author(s):  
Michael J. Strauss ◽  
Darya Asheghali ◽  
Austin Evans ◽  
Rebecca Li ◽  
Anton Chavez ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Self Assembly ◽  
Gel Permeation Chromatography ◽  
Synthetic Polymers ◽  
Young’S Moduli ◽  
Structural Rigidity ◽  
Assembly Mechanism ◽  
Low Dimensionality ◽  
Harsh Conditions

<p>Nanotubes assembled from macrocyclic precursors offer a unique combination of low dimensionality, structural rigidity, and distinct interior and exterior microenvironments. Usually the weak stacking energies of macrocycles limit the length or strength of the resultant nanotubes. Imine-linked macrocycles were recently found to assemble into high-aspect ratio (>10<sup>3</sup>), lyotropic nanotubes in the presence of excess acid. Yet these harsh conditions are incompatible with many functional groups and processing methods, and lower acid loadings instead catalyze macrocycle degradation. Here we report pyridine-2,6-diimine-linked macrocycles that assemble into high-aspect ratio nanotubes in the presence of less than 1 equiv of CF<sub>3</sub>CO<sub>2</sub>H per macrocycle. Analysis by gel permeation chromatography and fluorescence spectroscopy revealed a cooperative self-assembly mechanism. Nanofibers obtained by touch-spinning the pyridinium-based nanotubes exhibit Young’s moduli of 1.48 GPa, which exceeds that of many synthetic polymers and biological filaments. These findings will enable the design of structurally diverse nanotubes from synthetically accessible macrocycles. </p>

Formation of High-Aspect-Ratio Helical Nanorods via Chiral Self-Assembly of Fullerodendrimers

2014 ◽  
Vol 5 (5) ◽  
pp. 929-934 ◽  
Author(s):  
Andrew J. Hilmer ◽  
Darin O. Bellisario ◽  
Steven Shimizu ◽  
Thomas P. McNicholas ◽  
Qing Hua Wang ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Self Assembly

scholarly journals Fabrication of silicon nanotip arrays with high aspect ratio by cesium chloride self-assembly and dry etching

AIP Advances ◽  
2014 ◽  
Vol 4 (3) ◽  
pp. 031335 ◽  
Author(s):  
Xinshuai Zhang ◽  
Jing Liu ◽  
Bo Wang ◽  
Tianchong Zhang ◽  
Futing Yi
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Self Assembly ◽  
Cesium Chloride ◽  
Dry Etching ◽  
Silicon Nanotip
Sign in / Sign up

Export Citation Format

Share Document