Templating the 3D structure of conducting polymers with self-assembling peptides

2017 ◽  
Vol 5 (24) ◽  
pp. 4690-4696 ◽  
Author(s):  
T. J. Blatz ◽  
M. M. Fry ◽  
E. I. James ◽  
T. J. Albin ◽  
Z. Pollard ◽  
...  
Keyword(s):  
Conducting Polymers ◽  
3D Structure ◽  
Porous Structures ◽  
Electrically Conductive ◽  
Self Assembling

Polymerization of pre-assembled peptide–thiophene monomers produced electrically conductive gels with fibrous, porous structures.

TRANSPORT PHENOMENA IN PERCOLATING STRUCTURES: A KEY FOR THE ANALYSIS AND REINTERPRETATION OF SOME PRACTICAL MODELING PROBLEMS

Fractals ◽  
1996 ◽  
Vol 04 (03) ◽  
pp. 227-235
Author(s):  
J. S. ANDRADE ◽  
D. A. STREET ◽  
Y. SHIBUSA ◽  
N. ITO
Keyword(s):  
Conducting Polymers ◽  
Disordered Systems ◽  
Transport Phenomena ◽  
Practical Case ◽  
Porous Structures ◽  
Resistor Network ◽  
First Case ◽  
Effective Transport ◽  
Flow Through

The percolating morphology is adopted as a reference conceptualization to evaluate the “fractality” effect on the transport phenomena in disordered systems. The relevance of this approach is demonstrated using two practical case studies: conducting polymers and porous media. In the first case, a conceptual model for conducting polymers is proposed in terms of a random resistor network subjected to percolation disorder. The effect of topological and morphological disorder on the conducting behavior of an idealized system is investigated and some insights, are given as to the way in which conducting polymers could be designed. In the second case, the examination of effective transport properties in percolation-like porous structures enables us to reinterpret the classical guidelines for the characterization of fluid flow through porous beds.

Electrically conductive PVC layers filled with active carbon containing H+-conducting porous structures of sulfuric acid complexes of cyclams on fabrics

2015 ◽  
Vol 89 (7) ◽  
pp. 1305-1309 ◽  
Author(s):  
A. Yu. Tsivadze ◽  
A. Ya. Fridman ◽  
E. M. Morozova ◽  
N. P. Sokolova ◽  
A. M. Voloshchuk ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Active Carbon ◽  
Porous Structures ◽  
Electrically Conductive

scholarly journals The Influence of Disorder in the Synthesis, Characterization and Applications of a Modifiable Two-Dimensional Covalent Organic Framework

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 71
Author(s):  
Jordan Brophy ◽  
Kyle Summerfield ◽  
Jiashi Yin ◽  
Jon Kephart ◽  
Joshua T. Stecher ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Small Molecules ◽  
Condensation Reaction ◽  
3D Structure ◽  
Polymerization Process ◽  
Two Dimensional ◽  
Porous Structures ◽  
Substitution Reactions ◽  
The Past ◽  
2D And 3D

Two-dimensional covalent organic frameworks (2D-COFs) have been of increasing interest in the past decade due to their porous structures that ideally can be highly ordered. One of the most common routes to these polymers relies on Schiff-base chemistry, i.e., the condensation reaction between a carbonyl and an amine. In this report, we elaborate on the condensation of 3,6-dibromobenzene-1,2,4,5-tetraamine with hexaketocyclohexane (HKH) and the subsequent carbonylation of the resulting COF, along with the possibility that the condensation reaction on HKH can result in a trans configuration resulting in the formation of a disordered 2D-COF. This strategy enables modification of COFs via bromine substitution reactions to place functional groups within the pores of the materials. Ion-sieving measurements using membranes from this COF, reaction of small molecules with unreacted keto groups along with modeling studies indicate disorder in the COF polymerization process. We also present a Monte Carlo simulation that demonstrates the influence of even small amounts of disorder upon both the 2D and 3D structure of the resulting COF.

scholarly journals Conducting Silicone-Based Polymers and Their Application

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 2012
Author(s):  
Jadwiga Sołoducho ◽  
Dorota Zając ◽  
Kamila Spychalska ◽  
Sylwia Baluta ◽  
Joanna Cabaj
Keyword(s):  
Conducting Polymers ◽  
Heat Stability ◽  
Rechargeable Batteries ◽  
Environmental Stability ◽  
Degree Of Crystallinity ◽  
Effective Parameters ◽  
Electrically Conductive ◽  
The Past ◽  
Silicone Polymers ◽  
Low Temperature Flexibility

Over the past two decades, both fundamental and applied research in conducting polymers have grown rapidly. Conducting polymers (CPs) are unique due to their ease of synthesis, environmental stability, and simple doping/dedoping chemistry. Electrically conductive silicone polymers are the current state-of-the-art for, e.g., optoelectronic materials. The combination of inorganic elements and organic polymers leads to a highly electrically conductive composite with improved thermal stability. Silicone-based materials have a set of extremely interesting properties, i.e., very low surface energy, excellent gas and moisture permeability, good heat stability, low-temperature flexibility, and biocompatibility. The most effective parameters constructing the physical properties of CPs are conjugation length, degree of crystallinity, and intra- and inter-chain interactions. Conducting polymers, owing to their ease of synthesis, remarkable environmental stability, and high conductivity in the doped form, have remained thoroughly studied due to their varied applications in fields like biological activity, drug release systems, rechargeable batteries, and sensors. For this reason, this review provides an overview of organosilicon polymers that have been reported over the past two decades.

scholarly journals Mechanics and kinetics of dynamic instability

eLife ◽  
2020 ◽  
Vol 9 ◽  
Author(s):  
Thomas CT Michaels ◽  
Shuo Feng ◽  
Haiyi Liang ◽  
L Mahadevan
Keyword(s):  
Mechanical Stability ◽  
Dynamic Instability ◽  
3D Structure ◽  
Three Dimensional ◽  
Quenched Disorder ◽  
Self Assembling ◽  
Tubulin Subunit ◽  
3D Geometry ◽  
Kinetics Of ◽  
Kinetic Regulation

During dynamic instability, self-assembling microtubules (MTs) stochastically alternate between phases of growth and shrinkage. This process is driven by the presence of two distinct states of MT subunits, GTP- and GDP-bound tubulin dimers, that have different structural properties. Here, we use a combination of analysis and computer simulations to study the mechanical and kinetic regulation of dynamic instability in three-dimensional (3D) self-assembling MTs. Our model quantifies how the 3D structure and kinetics of the distinct states of tubulin dimers determine the mechanical stability of MTs. We further show that dynamic instability is influenced by the presence of quenched disorder in the state of the tubulin subunit as reflected in the fraction of non-hydrolysed tubulin. Our results connect the 3D geometry, kinetics and statistical mechanics of these tubular assemblies within a single framework, and may be applicable to other self-assembled systems where these same processes are at play.

Self-Assembly of Meso- and Nanoparticles into 3d Ordered Arrays and its Applications

1999 ◽  
Vol 576 ◽  
Author(s):  
Byron Gates ◽  
Younan Xia
Keyword(s):  
Self Assembly ◽  
Colloidal Particles ◽  
Periodic Structures ◽  
Practical Method ◽  
Porous Structures ◽  
Inverse Opals ◽  
Ordered Arrays ◽  
Self Assembling ◽  
Silica Colloids ◽  
Ordered Porous

ABSTRACTThis presentation describes a simple and practical method for self-assembling meso- and nanoparticles into three-dimensionally ordered lattices (opals) over large areas, and the use of these lattices as templates in fabricating highly ordered porous structures such as inverse opals. This method has been applied to a variety of colloidal particles, including silica colloids and polymer beads with diameters in the range of˜50 nm to ˜50 μm. Templating against the 3D opaline lattices provides an effective route to inorganic-organic composite materials and inverse opals having 3D periodic structures.

Conducting Polymers: Past, Present and Future…

1993 ◽  
Vol 328 ◽  
Author(s):  
Alan G. MacDiarmid ◽  
Arthur J. Epstein
Keyword(s):  
Conducting Polymers ◽  
Conducting Polymer ◽  
Electromagnetic Interference ◽  
Large Scale ◽  
Rechargeable Batteries ◽  
Organic Polymers ◽  
Electrically Conductive ◽  
Light Emitting ◽  
Gas Separation Membrane ◽  
Separation Membrane

ABSTRACTSince their discovery 16 years ago, the field of intrinsically conducing polymers — “synthetic Metals” — has developed at an unexpectedly rapid rate. The concept of “doping” is the unifying theme which distinguishes this class of organic polymers — “conducting polymers” — from all others. Doping results in dramatic electronic and magnetic changes with a concomitant increase in conductivity to, or approaching, the metallic regime. Doping phenomena and the chief types of dopable organic polymers are described with particular emphasis on polyaniline, which is now probably the most actively-studied conducting polymer. It has been commercialized on a relatively large scale and presently appears to be the leading conducting polymer for technology. It shows considerable promise for electromagnetic interference (EMI) shielding and as a gas separation Membrane, and is currently used in commercial rechargeable batteries. Polypyrrole is used commercially in capacitors and as an electrically conductive coating on conventional fabrics. Additional potential uses of conducting polymers such as light-emitting diodes, electrochromic windows, chemical sensors, etc. are also described briefly.

scholarly journals Stretchable electrothermochromic fibers based on hierarchical porous structures with electrically conductive dual-pathways

2020 ◽  
Vol 63 (12) ◽  
pp. 2582-2589
Author(s):  
Hongwei Fan ◽  
Qiang Li ◽  
Kerui Li ◽  
Chengyi Hou ◽  
Qinghong Zhang ◽  
...  
Keyword(s):  
Porous Structures ◽  
Electrically Conductive ◽  
Hierarchical Porous

Conducting Polymer with Improved Long-Time Stability: Polyaniline-Polyelectrolyte Complex

1993 ◽  
Vol 328 ◽  
Author(s):  
Linfeng Sun ◽  
Sze C. Yang ◽  
Jia-Ming Liu
Keyword(s):  
Thermal Stability ◽  
Conducting Polymers ◽  
Charge Density ◽  
Polyelectrolyte Complex ◽  
Polymeric Complex ◽  
Time Stability ◽  
Weak Base ◽  
Electrically Conductive ◽  
Long Time ◽  
Heat And Moisture

ABSTRACTConducting polymers, e.g. polyaniline, generally lack stability in their electrically conductive form due to heat and moisture induced loss of dopant. Using a template-guided synthesis scheme, we synthesized a polymeric complex of polyaniline and polyelectrolyte that showed stability against dedoping by moisture and heat. The polymeric complex consists of a strand of polyaniline twisted tightly with a strand of polyelectrolyte. The polyelectrolyte in the complex serves as a macromolecular dopant for polyaniline. These two components of the complex are tightly bound so that the dopant is not lost during tests for thermal stability and stability in water and Moisture. Since the dopant is a polyelectrolyte with high linear anion charge density, the complex resists deprotonation by water or weak base (pH < 10).

Conductive Nano-brush Synthesized by Physical Grafting of Conducting Polymers on Carbon Nanotube

2011 ◽  
Vol 1304 ◽  
Author(s):  
Kaushalkumar Purohit ◽  
Maureen Mirville ◽  
Sze C. Yang ◽  
Arun Shukla ◽  
Vijaya B. Chalivendra
Keyword(s):  
Composite Material ◽  
Conducting Polymers ◽  
Conducting Polymer ◽  
Physical Adsorption ◽  
Water Soluble ◽  
Poly Vinyl Alcohol ◽  
Electrical Networks ◽  
Electrically Conductive ◽  
Carbon Nano Tube ◽  
Electrically Conductive Composite

ABSTRACTWe report a novel method for synthesizing electrically conductive nano-brush (CNB) by physical grafting of organic conducting polymers on carbon nano tubes (CNT). The objective for this synthesis is to produce nano tubes having a CNT stem coated with flexible electronic conducting polymers. The nano-brush is to be blended into common polymers (e.g. epoxy, polyurethane, and poly(vinyl alcohol)) to form electrically conductive composite material. The flexible organic conducting polymer in CNB is a potentially sensitive electronic probe for mechanically induced nano-deformation of the composite because it is molecularly entangled with the host polymers. The electrical networks of CNB embedded in polymeric composites are potentially useful as in situ sensors for monitoring material deformation with an unprecedented level of sensitivity. The composite material is “smart” in the sense that it self-reports the structural “health” before load induced material failure.Our method for grafting conducting polymer does not require chemical reactions with the surface atoms of the carbon nano tube. We used physical adsorption to graft electronic conducting polymer to CNT. We first synthesized a water-soluble electronic conducting polymer which is a molecular complex between poly(acrylic acid) and polyaniline. The CNT solid were dispersed and un-bundled by sonnication in the conducting polymer solution. Due to the high affinity between CNT and the conducting polymer, the surface of CNT can be fully covered with the conducting polymer. The experimental data is consistent with a structure of nano brush with high density of conducting polymers grafted on the CNT surface.

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