Nanostructured hybrid polymer networks from in situ self-assembly of RAFT-synthesized POSS-based block copolymers

2011 ◽  
Vol 49 (20) ◽  
pp. 4343-4352 ◽  
Author(s):  
Yuanming Deng ◽  
Julien Bernard ◽  
Pierre Alcouffe ◽  
Jocelyne Galy ◽  
Lizong Dai ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Polymer Networks ◽  
Hybrid Polymer

scholarly journals Self-assembly of block copolymers during hollow fiber spinning: an in situ small-angle X-ray scattering study

Nanoscale ◽  
2019 ◽  
Vol 11 (16) ◽  
pp. 7634-7647 ◽  
Author(s):  
Kirti Sankhala ◽  
D. C. Florian Wieland ◽  
Joachim Koll ◽  
Maryam Radjabian ◽  
Clarissa Abetz ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Hollow Fiber ◽  
Small Angle ◽  
Self Assembly ◽  
Fiber Spinning ◽  
The Self ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study

A study of the self-assembly of block copolymers in ordered and weakly segregated solutions after extrusion during fabrication of isoporous hollow fiber membranes.

Parallel Arrays of Sub-10 nm Aligned Germanium Nanofins from an In Situ Metal Oxide Hardmask using Directed Self-Assembly of Block Copolymers

2015 ◽  
Vol 27 (17) ◽  
pp. 6091-6096 ◽  
Author(s):  
Cian Cummins ◽  
Anushka Gangnaik ◽  
Roisin A. Kelly ◽  
Alan J. Hydes ◽  
John O’Connell ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Metal Oxide ◽  
Self Assembly ◽  
Parallel Arrays

scholarly journals Infinite coordination polymer networks: metallogelation of aminopyridine conjugates and in situ silver nanoparticle formation

Soft Matter ◽  
2019 ◽  
Vol 15 (3) ◽  
pp. 442-451 ◽  
Author(s):  
Rajendhraprasad Tatikonda ◽  
Evgeny Bulatov ◽  
Zülal Özdemir ◽  
Nonappa Nonappa ◽  
Matti Haukka
Keyword(s):  
Molecular Weight ◽  
Coordination Polymer ◽  
Silver Nanoparticle ◽  
Self Assembly ◽  
Polymer Network ◽  
Polymer Networks ◽  
Organic Ligands ◽  
Low Molecular Weight ◽  
Small Nanoparticles

Self-assembly of silver(i) and low molecular weight organic ligands derived from aminopyridine conjugates led to in situ generation of an infinite coordination polymer network and ultra small nanoparticles.

Highly Ordered Nanoconfinement Effect from Evaporation-Induced Self-Assembly of Block Copolymers on In Situ Polymerized PEDOT:Tos

2017 ◽  
Vol 6 (4) ◽  
pp. 386-392 ◽  
Author(s):  
Yeon Hyeok Lee ◽  
Jinwoo Oh ◽  
Sang-Soo Lee ◽  
Heesuk Kim ◽  
Jeong Gon Son
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Evaporation Induced Self Assembly

In vitro and in vivo polysaccharides assembly: ultrastructural and cytochemical study of growing plant cell wall components.

1978 ◽  
Vol 36 (2) ◽  
pp. 434-435
Author(s):  
D. Reis ◽  
B. Vian ◽  
J. C. Roland
Keyword(s):  
Cell Wall ◽  
Self Assembly ◽  
Plant Cell Wall ◽  
Higher Plants ◽  
Three Dimensional ◽  
Cytochemical Study ◽  
Wall Components

Wall morphogenesis in higher plants is a problem still open to controversy. Until now the possibility of a transmembrane control and the involvement of microtubules were mostly envisaged. Self-assembly processes have been observed in the case of walls of Chlamydomonas and bacteria. Spontaneous gelling interactions between xanthan and galactomannan from Ceratonia have been analyzed very recently. The present work provides indications that some processes of spontaneous aggregation could occur in higher plants during the formation and expansion of cell wall.Observations were performed on hypocotyl of mung bean (Phaseolus aureus) for which growth characteristics and wall composition have been previously defined.In situ, the walls of actively growing cells (primary walls) show an ordered three-dimensional organization (fig. 1). The wall is typically polylamellate with multifibrillar layers alternately transverse and longitudinal. Between these layers intermediate strata exist in which the orientation of microfibrils progressively rotates. Thus a progressive change in the morphogenetic activity occurs.

Self-Assembly of Hydrogels From Elastin-Mimetic Block Copolymers

2002 ◽  
Vol 724 ◽  
Author(s):  
Elizabeth R. Wright ◽  
R. Andrew McMillan ◽  
Alan Cooper ◽  
Robert P. Apkarian ◽  
Vincent P. Conticello
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Variable Temperature ◽  
Inverse Temperature ◽  
Temperature Transition ◽  
Scanning Calorimetry ◽  
Design Synthesis ◽  
Inverse Temperature Transition ◽  
Functional Biomaterials

AbstractTriblock copolymers have traditionally been synthesized with conventional organic components. However, triblock copolymers could be synthesized by the incorporation of two incompatible protein-based polymers. The polypeptides would differ in their hydrophobicity and confer unique physiochemical properties to the resultant materials. One protein-based polymer, based on a sequence of native elastin, that has been utilized in the synthesis of biomaterials is poly (Valine-Proline-Glycine-ValineGlycine) or poly(VPGVG) [1]. This polypeptide has been shown to have an inverse temperature transition that can be adjusted by non-conservative amino acid substitutions in the fourth position [2]. By combining polypeptide blocks with different inverse temperature transition values due to hydrophobicity differences, we expect to produce amphiphilic polypeptides capable of self-assembly into hydrogels. Our research examines the design, synthesis and characterization of elastin-mimetic block copolymers as functional biomaterials. The methods that are used for the characterization include variable temperature 1D and 2D High-Resolution-NMR, cryo-High Resolutions Scanning Electron Microscopy and Differential Scanning Calorimetry.

Probing the Dynamic Self-Assembly Behaviour of Photoswitchable Wormlike Micelles in Real Time

2018 ◽  
Author(s):  
Elaine A. Kelly ◽  
Judith E. Houston ◽  
Rachel Evans
Keyword(s):  
Real Time ◽  
Absorption Spectroscopy ◽  
Self Assembly ◽  
Uv Light ◽  
Wormlike Micelles ◽  
Tetraethylene Glycol ◽  
Light Illumination ◽  
First Time ◽  
Dependent Processes

Understanding the dynamic self-assembly behaviour of azobenzene photosurfactants (AzoPS) is crucial to advance their use in controlled release applications such as<i></i>drug delivery and micellar catalysis. Currently, their behaviour in the equilibrium <i>cis-</i>and <i>trans</i>-photostationary states is more widely understood than during the photoisomerisation process itself. Here, we investigate the time-dependent self-assembly of the different photoisomers of a model neutral AzoPS, <a>tetraethylene glycol mono(4′,4-octyloxy,octyl-azobenzene) </a>(C<sub>8</sub>AzoOC<sub>8</sub>E<sub>4</sub>) using small-angle neutron scattering (SANS). We show that the incorporation of <i>in-situ</i>UV-Vis absorption spectroscopy with SANS allows the scattering profile, and hence micelle shape, to be correlated with the extent of photoisomerisation in real-time. It was observed that C<sub>8</sub>AzoOC<sub>8</sub>E<sub>4</sub>could switch between wormlike micelles (<i>trans</i>native state) and fractal aggregates (under UV light), with changes in the self-assembled structure arising concurrently with changes in the absorption spectrum. Wormlike micelles could be recovered within 60 seconds of blue light illumination. To the best of our knowledge, this is the first time the degree of AzoPS photoisomerisation has been tracked <i>in</i><i>-situ</i>through combined UV-Vis absorption spectroscopy-SANS measurements. This technique could be widely used to gain mechanistic and kinetic insights into light-dependent processes that are reliant on self-assembly.

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