scholarly journals Light-responsive self-assembly of a cationic azobenzene surfactant at high concentration

Soft Matter ◽  
2020 ◽  
Vol 16 (40) ◽  
pp. 9183-9187
Author(s):  
Camille Blayo ◽  
Elaine A. Kelly ◽  
Judith E. Houston ◽  
Nikul Khunti ◽  
Nathan P. Cowieson ◽  
...  
Keyword(s):  
Long Range ◽  
Uv Irradiation ◽  
Self Assembly ◽  
Optical Anisotropy ◽  
Range Order ◽  
Long Range Order ◽  
High Concentration ◽  
Self Assembled ◽  
High Concentrations

A cationic azobenzene photosurfactant (AzoTAB) forms self-assembled structures with long-range order and optical anisotropy at high concentrations. These high-concentration mesophases are lost or disrupted with UV irradiation.

Heat capacities and volumes of NaCl, MgCl2, CaCl2, and NiCl2 up to 6 molal in water

1981 ◽  
Vol 59 (21) ◽  
pp. 3049-3054 ◽  
Author(s):  
Gèrald Perron ◽  
Alain Roux ◽  
Jacques E. Desnoyers
Keyword(s):  
Aqueous Solutions ◽  
Long Range ◽  
Higher Order ◽  
Heat Capacities ◽  
Range Order ◽  
Long Range Order ◽  
High Concentration ◽  
Concentration Region ◽  
Partial Molar Heat Capacities ◽  
High Concentrations

It has been claimed by Enderby and co-workers that changes in long-range order occur in NiCl2 aqueous solutions at high concentrations. To investigate the possibility of a transition, the partial molar heat capacities and volumes of NiCl2, CaCl2, MgCl2, and NaCl were measured and compared in water at 25 °C up to 6 mol kg−1. In the case of NaCl, data were also measured at 5 and 45 °C. A slight change in slope of [Formula: see text] is observed for NiCl2 around 4 mol kg−1 which may suggest a third or higher order transition. However, the change is too small to support unambiguously any particular model for the high concentration region.

Long-Range Order Self-Assembly of Conjugated Block Copolymers at Inclined Air–Liquid Interfaces

2020 ◽  
Vol 12 (4) ◽  
pp. 5099-5105 ◽  
Author(s):  
Saejin Oh ◽  
Seulki Kang ◽  
Ma. Helen M. Cativo ◽  
Myungjae Yang ◽  
Sung-Hee Chung ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Long Range ◽  
Self Assembly ◽  
Range Order ◽  
Long Range Order ◽  
Liquid Interfaces

Liquid crystal phases of self-assembled amphiphilic aggregates

1993 ◽  
Vol 344 (1672) ◽  
pp. 357-375 ◽  
Keyword(s):  
Long Range ◽  
Range Order ◽  
Long Range Order ◽  
Self Assembling ◽  
Ordered Phases ◽  
Aggregate Morphology ◽  
Aggregate Growth ◽  
Nematic Phases ◽  
High Concentrations ◽  
Concentrated Solution

Long-range order in solutions of reversibly self-assembling molecules results from interactions among the asymmetric aggregates. Even for electrically neutral species, repulsions between the aggregates become significant at high concentrations. At the very least, the excluded volume of asymmetric aggregates creates formidable packing constraints which are relieved by orientational and positional alignment. Aggregate growth thus promotes long-range order, and long-range order facilitates growth. Nematic phases occur if aggregate growth is strong enough to induce orientational ordering at concentrations lower than those that induce positional ordering. The symmetry of the positionally ordered phases reflects aggregate morphology: the polydispersity of aggregates that grow in one (two) dimension(s) to form rod-like (plate-like) particles suppresses the smectic (columnar) phase in favour of the columnar (smectic) phase. Because plate-like aggregates pack more easily than rod-like aggregates, increasing concentration induces a rearrangement from rod-like to plate-like aggregates, and a transition from columnar to smectic ordering, in solutions of molecules, such as surfactants, capable of forming both types of aggregates. In mixtures of aggregating and non-aggregating species, the difficulty of packing spherically shaped particles among elongated particles results in dramatic demixing such that a very concentrated solution of very large, highly aligned aggregates coexists with a relatively dilute solution depleted of the aggregating species.

Dynamic supramolecular self-assembly: hydrogen bonding-induced contraction and extension of functional polymers

2017 ◽  
Vol 8 (21) ◽  
pp. 3294-3299 ◽  
Author(s):  
Chih-Chia Cheng ◽  
Jui-Hsu Wang ◽  
Wei-Tsung Chuang ◽  
Zhi-Sheng Liao ◽  
Jyun-Jie Huang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Long Range ◽  
Self Assembly ◽  
Functional Polymers ◽  
Range Order ◽  
Supramolecular Polymer ◽  
Long Range Order ◽  
Nano Scale

A ureido-cytosine-functionalized supramolecular polymer can be manipulated to control nano-scale microstructures and its ability to form long-range order during self-assembly.

Nanostructures with long-range order in monolayer self-assembly

2008 ◽  
Vol 78 (2) ◽  
Author(s):  
Feng Shi ◽  
Pradeep Sharma ◽  
Donald J. Kouri ◽  
Fazle Hussain ◽  
Gemunu H. Gunaratne
Keyword(s):  
Long Range ◽  
Self Assembly ◽  
Range Order ◽  
Long Range Order

scholarly journals Structural order enhances charge carrier transport in self-assembled Au-nanoclusters

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Florian Fetzer ◽  
Andre Maier ◽  
Martin Hodas ◽  
Olympia Geladari ◽  
Kai Braun ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Long Range ◽  
Finite Size ◽  
Functional Materials ◽  
Building Blocks ◽  
Optoelectronic Properties ◽  
Range Order ◽  
Long Range Order ◽  
Energetic Disorder ◽  
Self Assembled

AbstractThe collective properties of self-assembled nanoparticles with long-range order bear immense potential for customized electronic materials by design. However, to mitigate the shortcoming of the finite-size distribution of nanoparticles and thus, the inherent energetic disorder within assemblies, atomically precise nanoclusters are the most promising building blocks. We report an easy and broadly applicable method for the controlled self-assembly of atomically precise Au32(nBu3P)12Cl8 nanoclusters into micro-crystals. This enables the determination of emergent optoelectronic properties which resulted from long-range order in such assemblies. Compared to the same nanoclusters in glassy, polycrystalline ensembles, we find a 100-fold increase in the electric conductivity and charge carrier mobility as well as additional optical transitions. We show that these effects are due to a vanishing energetic disorder and a drastically reduced activation energy to charge transport in the highly ordered assemblies. This first correlation of structure and electronic properties by comparing glassy and crystalline self-assembled superstructures of atomically precise gold nanoclusters paves the way towards functional materials with novel collective optoelectronic properties.

scholarly journals Chiral self-sorting of active semiflexible filaments with intrinsic curvature

Soft Matter ◽  
2021 ◽  
Author(s):  
Jeffrey M Moore ◽  
Matthew Glaser ◽  
Meredith D. Betterton
Keyword(s):  
Long Range ◽  
Self Assembly ◽  
Range Order ◽  
The Self ◽  
Long Range Order ◽  
Active Matter ◽  
Many Body ◽  
Intrinsic Curvature ◽  
Dynamic Structures ◽  
Many Body Interactions

Many-body interactions in systems of active matter can cause particles to move collectively and self-organize into dynamic structures with long-range order. In cells, the self-assembly of cy- toskeletal filaments is...

Guide Pattern for Long-Range-Order Nanofabrication of Self-Assembled Block Copolymers

2010 ◽  
Vol 459 ◽  
pp. 124-128 ◽  
Author(s):  
Takashi Akahane ◽  
Miftakhul Huda ◽  
You Yin ◽  
Sumio Hosaka
Keyword(s):  
Electron Beam ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Long Range ◽  
Range Order ◽  
Long Range Order ◽  
Self Assembled ◽  
Guide Lines

In this paper, we report two kinds of guide patterns precisely created by electron beam drawing. These guide patterns are expected to precisely control the arrangement of nanodots self-assembled from block copolymer (BCP) in order to obtain long-range-order nanofabrication. The first guide pattern is comprised only of a post lattice. The second guide pattern adds guide lines to the post lattice. The added guide lines are expected to better control the location and orientation of the BCP nanodots. We succeeded in fabricating these two kinds of guide patterns for 22-nm- and 33-nm-pitch BCP nanodots.

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