Hydrophobic polymers, tethered to the water surface II: free-standing rubber-elastic LB-films

1997 ◽  
Vol 105 (1) ◽  
pp. 167-172 ◽  
Author(s):  
R. Heger ◽  
W. A. Goedel
Keyword(s):  
Water Surface ◽  
Free Standing ◽  
Lb Films ◽  
Hydrophobic Polymers

scholarly journals Quick liquid packaging: Encasing water silhouettes by three-dimensional polymer membranes

2019 ◽  
Vol 5 (5) ◽  
pp. eaat5189 ◽  
Author(s):  
Sara Coppola ◽  
Giuseppe Nasti ◽  
Veronica Vespini ◽  
Laura Mecozzi ◽  
Rachele Castaldo ◽  
...  
Keyword(s):  
Water Surface ◽  
Liquid Core ◽  
Three Dimensional ◽  
Polymer Membranes ◽  
Industrial Processes ◽  
Free Standing ◽  
Biocompatible Polymer ◽  
Self Assembling ◽  
Custom Made ◽  
On Chip

One of the most important substances on Earth is water. It is an essential medium for living microorganisms and for many technological and industrial processes. Confining water in an enclosed compartment without manipulating it or by using rigid containers can be very attractive, even more if the container is biocompatible and biodegradable. Here, we propose a water-based bottom-up approach for facile encasing of short-lived water silhouettes by a custom-made adaptive suit. A biocompatible polymer self-assembling with unprecedented degree of freedom over the water surface directly produces a thin membrane. The polymer film could be the external container of a liquid core or a free-standing layer with personalized design. The membranes produced have been characterized in terms of physical properties, morphology and proposed for various applications from nano- to macroscale. The process appears not to harm cells and microorganisms, opening the way to a breakthrough approach for organ-on-chip and lab-in-a-drop experiments.

Research on LB Films of Two Schiff Base Compounds with Alkyl Chains and Different Azobenzene Substituted Groups

2012 ◽  
Vol 581-582 ◽  
pp. 668-671
Author(s):  
Jing Xin Zhou ◽  
Ti Feng Jiao ◽  
Xu Hui Li ◽  
Feng Yan Wang
Keyword(s):  
Schiff Base ◽  
Water Surface ◽  
Supramolecular Assembly ◽  
Molecular Films ◽  
Lb Films ◽  
Alkyl Chains ◽  
Spectral Changes ◽  
Coordination Process ◽  
Predominant Effect

In order to investigate the supramolecular assembly and interfacial coordination of special amphiphile, two Schiff Base compounds with alkyl chains and different azobenzene substituted groups were designed and synthesized, and their supramolecular assembly and interfacial properties were investigated by spectral and morphological measurements. It was found that the Schiff base compounds can be spread on water surface to form stable monolayer. When on the Cu(II) ions subphase, an in situ coordination can occur for all ligands. In addition, for the coordination process of C16SB-Me-Azo with Cu(II), there are obvious spectral changes for the alkyl chains. For all process, the headgroups in all amphiphiles have predominant effect in regulating the aggregation mode and spectral changes in organized molecular films.

Hydrophobic polymers, tethered to the water surface I: fluid monolayers

1997 ◽  
Vol 105 (1) ◽  
pp. 160-166 ◽  
Author(s):  
W. A. Goedel ◽  
R. Heger
Keyword(s):  
Water Surface ◽  
Hydrophobic Polymers

Supramolecular Assembly of Functional Cholesteryl Substituted Luminol Derivative in Organized Molecular Films

2012 ◽  
Vol 581-582 ◽  
pp. 176-179
Author(s):  
Jing Xin Zhou ◽  
Ti Feng Jiao ◽  
Adan Li ◽  
Yuan Yuan Xing
Keyword(s):  
Ir Spectra ◽  
Potential Application ◽  
Water Surface ◽  
Supramolecular Assembly ◽  
Cd Spectra ◽  
Functional Material ◽  
Lb Films ◽  
Uv And Ir Spectra ◽  
Imide Group ◽  
Luminol Derivative

Functional luminol derivative with cholesteryl substituted group has been designed and synthesized from the reaction of the corresponding precursor cholesteryl chloroformate with luminol. This compound can be spread on water surface to form stable monolayer. It has been found that UV and IR spectra confirmed the characteristic aromatic segment, imide group and cholesteryl substituted group. In addition, the CD spectra also showed positive CD signals, which may be attributed to the chiral cholesteryl substituted groups. AFM investigation indicated some aggregated domains with the averaged height about 3.6  0.2 nm appeared. This suggested an organized structure of double molecules may be fabricated in the transferred LB films. The present results have demonstrated that the interfacial properties of luminol derivative can be modified by changing proper substituted groups of luminol, which show potential application in functional material fields such as ECL sensor.

Going beyond the classical amphiphilicity paradigm: the self-assembly of completely hydrophobic polymers into free-standing sheets and hollow nanostructures in solvents of variable quality

Soft Matter ◽  
2016 ◽  
Vol 12 (22) ◽  
pp. 5011-5021 ◽  
Author(s):  
Huanting Huang ◽  
Yin Liao ◽  
Weifeng Bu ◽  
Wenjie Wang ◽  
Jing Zhi Sun
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Free Standing ◽  
Hydrophobic Polymers ◽  
Hollow Nanostructures ◽  
Variable Quality

Interfacial Coordination and Nanofiber Fabrication of a Tri-Pyridine-Based Derivative with Platinum (II) Ions

2010 ◽  
Vol 160-162 ◽  
pp. 1044-1049 ◽  
Author(s):  
Ti Feng Jiao ◽  
Yuan Yuan Xing ◽  
Jing Xin Zhou
Keyword(s):  
Water Surface ◽  
Alkyl Chain ◽  
Pure Water ◽  
Supramolecular Assembly ◽  
Langmuir Films ◽  
Nano Particles ◽  
Lb Films ◽  
Long Alkyl Chain

In order to investigate the supramolecular assembly and in situ coordination of special amphiphiles with aromatic moieties and without long alkyl chain, a tri-pyridine-based derivative was designed and synthesized. The spreading behaviors of the Langmuir films fabricated from pure water and the subphase containing K2PtCl4 were studied in details. It was found that the compound could form interesting Langmuir films through the interfacial coordination with Pt(II) ions. While well-dispersed nano particles were observed for the films transferred from pure water surface, dense coiled nanofibers could be obtained from Pt(II) subphase, which could be ascribed to the matching direction of coordination and - stacking of aromatic moieties. The transferred LB films were characterized by a series of methods. A rational packing mode was proposed.

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