scholarly journals Depletion-driven morphological transitions in hexagonal crystallites of virus rods

Soft Matter ◽  
2019 ◽  
Vol 15 (46) ◽  
pp. 9520-9527
Author(s):  
Baeckkyoung Sung ◽  
Henricus Herman Wensink ◽  
Eric Grelet
Keyword(s):  
Depletion Interaction ◽  
Morphological Transitions ◽  
Self Assembled

We show that the morphology of self-assembled superstructures of rod-like particles can be controlled from 1D fibers to 2D crystalline monolayers by tuning the particle attraction thanks to depletion interaction.

scholarly journals Controlled Morphological Changes in Self-Assembled Structures Formed by Fmoc Variants of Threonine and Serine

2021 ◽  
Author(s):  
Vivekshinh Kshtriya ◽  
Bharti Koshti ◽  
Nidhi Gour
Keyword(s):  
Self Assembly ◽  
Room Temperature ◽  
Morphological Changes ◽  
The Self ◽  
Temperature Conditions ◽  
Morphological Transitions ◽  
Concentration Changes ◽  
Higher Temperature ◽  
Self Assembled ◽  
First Time

<p>We report for the very first time the self-assembly of<a> </a>Fmoc variant 2-(9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(tert-butoxy)butanoic acid of threonine (<b>Fmoc-Thr(tbu)-OH</b>) and <a>of serine (</a><b>Fmoc-</b><b>Ser(tbu)-OH</b>. The self-assembled structure formation of Fmoc variants of threonine and serine were examined under varying concentration and temperature conditions..Our studies reveal that the self-assembled structures formed by <b>Fmoc-Thr(tbu)-OH </b>and <b>Fmoc-Ser(tbu)-OH </b>reveal morphological transitions at the supramolecular level as we alter its concentration and temperature. <b>Fmoc-Thr(tbu)-OH </b>self-assembles to sphere at lower concentration which changes to dumb-bell shapes at higher concentration under room temperature conditions. When the solution at lower concentration is heated the spheres changes to rods while the dumb bell shapes at higher concentrations change to elongated dumb-bell-rod like morphologies. <b>Fmoc-Ser(tbu)-OH </b>on<b> </b>the other hand give flower like morphologies at lower concentration which changes to long rods at higher concentration. On heating at higher temperature 70 <sup>ο</sup>C flower-like structures change to small rods while the long rods obtained at higher concentration changes to big flower-like structures. The controlled morphological changes noted in the modified single amino acids is very interesting and pave the way for the design of novel self-assembled architectures for applications in material science and nanotechnology.</p>

scholarly journals Controlled Morphological Changes in Self-Assembled Structures Formed by Fmoc Variants of Threonine and Serine

2021 ◽  
Author(s):  
Vivekshinh Kshtriya ◽  
Bharti Koshti ◽  
Nidhi Gour
Keyword(s):  
Self Assembly ◽  
Room Temperature ◽  
Morphological Changes ◽  
The Self ◽  
Temperature Conditions ◽  
Morphological Transitions ◽  
Concentration Changes ◽  
Higher Temperature ◽  
Self Assembled ◽  
First Time

<p>We report for the very first time the self-assembly of<a> </a>Fmoc variant 2-(9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(tert-butoxy)butanoic acid of threonine (<b>Fmoc-Thr(tbu)-OH</b>) and <a>of serine (</a><b>Fmoc-</b><b>Ser(tbu)-OH</b>. The self-assembled structure formation of Fmoc variants of threonine and serine were examined under varying concentration and temperature conditions..Our studies reveal that the self-assembled structures formed by <b>Fmoc-Thr(tbu)-OH </b>and <b>Fmoc-Ser(tbu)-OH </b>reveal morphological transitions at the supramolecular level as we alter its concentration and temperature. <b>Fmoc-Thr(tbu)-OH </b>self-assembles to sphere at lower concentration which changes to dumb-bell shapes at higher concentration under room temperature conditions. When the solution at lower concentration is heated the spheres changes to rods while the dumb bell shapes at higher concentrations change to elongated dumb-bell-rod like morphologies. <b>Fmoc-Ser(tbu)-OH </b>on<b> </b>the other hand give flower like morphologies at lower concentration which changes to long rods at higher concentration. On heating at higher temperature 70 <sup>ο</sup>C flower-like structures change to small rods while the long rods obtained at higher concentration changes to big flower-like structures. The controlled morphological changes noted in the modified single amino acids is very interesting and pave the way for the design of novel self-assembled architectures for applications in material science and nanotechnology.</p>

Rational controlled morphological transitions in the self-assembled multi-headed giant surfactants in solution

2016 ◽  
Vol 52 (56) ◽  
pp. 8687-8690 ◽  
Author(s):  
Yang Chu ◽  
Wei Zhang ◽  
Xinlin Lu ◽  
Gaoyan Mu ◽  
Baofang Zhang ◽  
...  
Keyword(s):  
The Self ◽  
And Topology ◽  
Morphological Transitions ◽  
Spherical Micelles ◽  
Self Assembled

A series of PS-POSS based giant surfactants can self-assemble into vesicles, cylindrical and spherical micelles in solution controlled by the different number and topology of POSS groups.

Phase-Field Simulation of Surface Morphology Evolution during Epitaxial Growth of SiGe/Si System

2007 ◽  
Vol 340-341 ◽  
pp. 1073-1078 ◽  
Author(s):  
Tomohiro Takaki ◽  
Yoshihiro Tomita
Keyword(s):  
Morphological Change ◽  
Phase Field ◽  
Ostwald Ripening ◽  
Phase Field Model ◽  
Elastic Strain Energy ◽  
Bimodal Distribution ◽  
Island Growth ◽  
Island Size ◽  
Morphological Transitions ◽  
Self Assembled

We have developed a phase-field model which can simulate the growth process of self-assembled SiGe/Si islands during deposition. The novel feature of this model is that it can reproduce the morphological transitions of islands, i.e., from single-faceted pyramid to multifaceted dome and from dome to barn, by taking a high anisotropy and a sixteen-fold anisotropy of surface energy into account. Two-dimensional simulations have been performed on a large computational model. As a result, island nucleation on the surface of a wetting layer, island morphological change and Ostwald ripening due to an interaction between two neighbor islands were well reproduced. The bimodal distribution of island size, which is a very important phenomenon in self-assembled quantum dots, could also be generated. Furthermore, it has been clarified that the bimodal distributions are largely affected by island morphological change from pyramid to dome. Furthermore, in order to discuss the mechanism of island growth, a simulation of single-island growth has been conducted and the variations of island size and energies have been estimated in detail. As a result, it is concluded that the island morphological transitions occur so as to reduce the elastic strain energy.

Sign in / Sign up

Export Citation Format

Share Document