Environmental stability of electrically conductive viologen-polyaniline systems

2002 ◽  
Vol 86 (8) ◽  
pp. 2099-2107 ◽  
Author(s):  
Baozong Zhao ◽  
K. G. Neoh ◽  
E. T. Kang
Keyword(s):  
Environmental Stability ◽  
Electrically Conductive

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.

Development of Electrically Conductive Poly(3-Hexylthiophene) as a thin Film Sensor for Hydrazine Vapor

1992 ◽  
Vol 293 ◽  
Author(s):  
D. L. Ellis ◽  
M. R. Zakin ◽  
L. S. Bernstein ◽  
M. F. Rubner
Keyword(s):  
Thin Film ◽  
Spin Coating ◽  
Measurement Accuracy ◽  
Environmental Stability ◽  
Interference Rejection ◽  
Film Sensor ◽  
Electrically Conductive ◽  
Thin Film Sensor ◽  
Electrically Conducting ◽  
Quartz Substrates

AbstractThin films of the electrically conducting polymer, poly(3-hexylthiophene) (P3HT), were developed as sensors for hydrazine vapor at the part-per-billion level. The P3HT films were fabricated by a spin coating technique onto quartz substrates incorporating gold interdigitated electrodes, and were rendered conductive by doping with an NOPF6 solution. The sensors respond strongly and instantaneously to hydrazine concentrations as low as 1 part-per-billion with a measurement accuracy of ±20%. In addition, the sensors exhibited excellent environmental stability, long shelf life, and good interference rejection.

Cryogenic atomic force microscopy

1991 ◽  
Vol 49 ◽  
pp. 54-55
Author(s):  
K. A. Fisher ◽  
M. G. L. Gustafsson ◽  
M. B. Shattuck ◽  
J. Clarke
Keyword(s):  
Room Temperature ◽  
Rapid Freezing ◽  
Cryogenic Temperatures ◽  
Soft Or ◽  
Electrically Conductive ◽  
Force Microscopy ◽  
Flexible Molecules ◽  
Advantages And Disadvantages ◽  
Atomic Force ◽  
Chemical Perturbation

The atomic force microscope (AFM) is capable of imaging electrically conductive and non-conductive surfaces at atomic resolution. When used to image biological samples, however, lateral resolution is often limited to nanometer levels, due primarily to AFM tip/sample interactions. Several approaches to immobilize and stabilize soft or flexible molecules for AFM have been examined, notably, tethering coating, and freezing. Although each approach has its advantages and disadvantages, rapid freezing techniques have the special advantage of avoiding chemical perturbation, and minimizing physical disruption of the sample. Scanning with an AFM at cryogenic temperatures has the potential to image frozen biomolecules at high resolution. We have constructed a force microscope capable of operating immersed in liquid n-pentane and have tested its performance at room temperature with carbon and metal-coated samples, and at 143° K with uncoated ferritin and purple membrane (PM).

Physical, Chemical, and Crystallographic Characterization of Anodic Coatings on High Strength Aluminum Base Alloys

1976 ◽  
Vol 34 ◽  
pp. 636-637
Author(s):  
R. E. Herfert ◽  
N. T. McDevitt
Keyword(s):  
Sulfuric Acid ◽  
Salt Spray ◽  
High Strength ◽  
Environmental Stability ◽  
Anodic Films ◽  
Sodium Dichromate ◽  
Corrosion Resistant ◽  
Aerospace Applications ◽  
Bond Strengths ◽  
Adhesive Bonded Joints

Durability of adhesive bonded joints in moisture and salt spray environments is essential to USAF aircraft. Structural bonding technology for aerospace applications has depended for many years on the preparation of aluminum surfaces by a sulfuric acid/sodium dichromate (FPL etch) treatment. Recently, specific thin film anodizing techniques, phosphoric acid, and chromic acid anodizing have been developed which not only provide good initial bond strengths but vastly improved environmental durability. These thin anodic films are in contrast to the commonly used thick anodic films such as the sulfuric acid or "hard" sulfuric acid anodic films which are highly corrosion resistant in themselves, but which do not provide good initial bond strengths, particularly in low temperature peel.The objective of this study was to determine the characteristics of anodic films on aluminum alloys that make them corrosion resistant. The chemical composition, physical morphology and structure, and mechanical properties of the thin oxide films were to be defined and correlated with the environmental stability of these surfaces in humidity and salt spray. It is anticipated that anodic film characteristics and corrosion resistance will vary with the anodizing processing conditions.

EFFECTS OF SILICIC ACID ON ENVIRONMENTAL STABILITY OF SPENT CALCIUM-BASED ARSENIC ADSORBENTS

2018 ◽  
Vol 74 (7) ◽  
pp. III_493-III_502
Author(s):  
Hajime SUGITA ◽  
Terumi OGUMA ◽  
Ming ZHANG ◽  
Junko HARA ◽  
Yoshishige KAWABE
Keyword(s):  
Silicic Acid ◽  
Environmental Stability
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