Electrical conductivity of a single conducting polyaniline nanotube

2003 ◽  
Vol 83 (9) ◽  
pp. 1863-1865 ◽  
Author(s):  
Yunze Long ◽  
Zhaojia Chen ◽  
Nanlin Wang ◽  
Yongjun Ma ◽  
Ze Zhang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Conducting Polyaniline

Investigation of the electrical conductivity and optical property of polyaniline-based nanocomposite and its application as an ethanol vapor sensor

2015 ◽  
Vol 39 (5) ◽  
pp. 3728-3735 ◽  
Author(s):  
Md. Dilwar Alam Khan ◽  
Arshia Akhtar ◽  
Syed Ashfaq Nabi
Keyword(s):  
Electrical Conductivity ◽  
Optical Property ◽  
Ethanol Vapor ◽  
Quick Response ◽  
Ethanol Sensor ◽  
Conducting Polyaniline ◽  
Vapor Sensor

A semi-conducting polyaniline–Sn(iv)iodophosphate nanocomposite ethanol sensor with quick response and reproducible behavior.

Preparation of Thermosensitive Conducting PANI@P(St-NIPAm) Composite Particles and Conductivity Properties

2020 ◽  
Vol 996 ◽  
pp. 29-34
Author(s):  
Qiang Zhang ◽  
Meng Hao Li ◽  
Ru Xiu Wang ◽  
Jia Jia Song ◽  
Bin Wang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Composite Particles ◽  
Particle Sizes ◽  
Conducting Composite ◽  
Conducting Polyaniline ◽  
Different Temperatures

Thermosensitive conducting composite particles were synthesized using the unsulfonated P(St-NIPAm) as a thermosensitive substrate. A series of characterizations have been performed to study the effects of thermosensitive PANI@poly (St-NIPAm) conductivity performance. Aniline diffused into P(St-NIPAm) particles in solution, and then polyaniline (PANI) was in-situ produced in P(St-NIPAm) particles through oxidation polymerization. The samples showed different particle sizes at different temperatures. The content of conducting polyaniline is dependent on NIPAm feed ratios. The particle electrical conductivity was improved with the increasing NIPAM feed ratios and exhibited thermal responsive electrical conductivity. The thermosensitive conducting composite particles will have wide applications in sensors, for example, they could be used to fabricate smart conductive gel responsive to temperature and moisture.

From amorphous to crystalline: Practical way to improve electrical conductivity of water-borne conducting polyaniline

Polymer ◽  
2011 ◽  
Vol 52 (14) ◽  
pp. 3059-3064 ◽  
Author(s):  
Hongming Zhang ◽  
Jinlong Lu ◽  
Xianhong Wang ◽  
Ji Li ◽  
Fosong Wang
Keyword(s):  
Electrical Conductivity ◽  
Conducting Polyaniline ◽  
Water Borne

Electrical Conductivity of Nanodimensional Polyaniline Particles in Nanoporous Dielectric Matrix of MIL-101

2013 ◽  
Vol 699 ◽  
pp. 238-244
Author(s):  
A.I. Romanenko ◽  
D.N. Dybtsev ◽  
V.P. Fedin ◽  
S.B. Aliev ◽  
O.B. Anikeeva ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electric Field ◽  
Energy Gap ◽  
Size Reduction ◽  
Tunneling Model ◽  
Dielectric Matrix ◽  
Conducting Polyaniline ◽  
Temperature Dependences ◽  
Composite Conductivity ◽  
A Current

We investigated an electrical conductivity of aniline polymerized inside nanopores of chromium terephthalate dielectric matrix MIL-101. We found that temperature dependences of conductivity (T) are described by the fluctuation-induced tunneling model, which means that the main contribution to a net conductivity is caused by contacts between particles of the polyaniline. We also found that the nanoporous matrix affects the composite conductivity via the size reduction of the conducting polyaniline phase encapsulated in the pores. Dependence of conductivity from a current was thoroughly investigated. This dependence is resulted from a reduction of energy gap for current carriers which is, in turn, induced by an increasing electric field applied.

scholarly journals Effect of gamma irradiation and ZnO nano particles on the A.C electrical conductivity of polyaniline

2019 ◽  
Vol 15 (32) ◽  
pp. 130-135
Author(s):  
Hanaa Sh. Mahmood Sh. Mahmood
Keyword(s):  
Electrical Conductivity ◽  
Conjugated Polymer ◽  
Ac Conductivity ◽  
Nano Particles ◽  
Nano Composites ◽  
Exponential Factor ◽  
Conducting Polyaniline ◽  
Cheap Method ◽  
One Step

Conducting polyaniline / ZnO nano composites are synthesizedusing a simplified cheap method with one step in –situ chemicalpolymerization, and AC conductivity (σac) of the prepared samples isstudied in the range of frequency from 50 Hz to 15MHz.). Thepresence of polarons in the conjugated polymer chain are responsiblefor the ac conductivity is reliance on the frequency in thesecomposites. The effect of increasing the ZnO nano particleconcentration irradiation and gamma radiation on the electricconductivity was analyzed. The result showed that thenanocomposite prepared has the highest conductivity, from purepolyaniline and the exponential factor S was found increasing withZnO content it was 0.739 for PANI pure and for 0.02 ZnO it was1.415.

Stable Aqueous Dispersion of Conducting Polyaniline with High Electrical Conductivity

2007 ◽  
Vol 40 (23) ◽  
pp. 8132-8135 ◽  
Author(s):  
Jing Luo ◽  
Hongming Zhang ◽  
Xianhong Wang ◽  
Ji Li ◽  
Fosong Wang
Keyword(s):  
Electrical Conductivity ◽  
Aqueous Dispersion ◽  
High Electrical Conductivity ◽  
Conducting Polyaniline

Removing Substrate Background in TEM Microanalysis

1974 ◽  
Vol 32 ◽  
pp. 568-569
Author(s):  
John C. Russ ◽  
Nicholas C. Barbi
Keyword(s):  
Electrical Conductivity ◽  
Rapid Growth ◽  
Organic Film ◽  
Absolute Concentration ◽  
Background Signal ◽  
X Ray ◽  
Elemental Concentrations ◽  
Transmission Electron ◽  
Electron Microscopes ◽  
The Continuum

The rapid growth of interest in attaching energy-dispersive x-ray analysis systems to transmission electron microscopes has centered largely on microanalysis of biological specimens. These are frequently either embedded in plastic or supported by an organic film, which is of great importance as regards stability under the beam since it provides thermal and electrical conductivity from the specimen to the grid.Unfortunately, the supporting medium also produces continuum x-radiation or Bremsstrahlung, which is added to the x-ray spectrum from the sample. It is not difficult to separate the characteristic peaks from the elements in the specimen from the total continuum background, but sometimes it is also necessary to separate the continuum due to the sample from that due to the support. For instance, it is possible to compute relative elemental concentrations in the sample, without standards, based on the relative net characteristic elemental intensities without regard to background; but to calculate absolute concentration, it is necessary to use the background signal itself as a measure of the total excited specimen mass.

Macromolecular structures of biological specimens are not obscured by controlled osmium impregnation

1983 ◽  
Vol 41 ◽  
pp. 606-607
Author(s):  
Klaus-Ruediger Peters ◽  
Samuel A. Green
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Critical Point ◽  
Metal Films ◽  
High Magnification ◽  
Osmium Impregnation ◽  
Instrumental Resolution ◽  
20 Nm ◽  
Continuous Metal

High magnification imaging of macromolecules on metal coated biological specimens is limited only by wet preparation procedures since recently obtained instrumental resolution allows visualization of topographic structures as smal l as 1-2 nm. Details of such dimensions may be visualized if continuous metal films with a thickness of 2 nm or less are applied. Such thin films give sufficient contrast in TEM as well as in SEM (SE-I image mode). The requisite increase in electrical conductivity for SEM of biological specimens is achieved through the use of ligand mediated wet osmiuum impregnation of the specimen before critical point (CP) drying. A commonly used ligand is thiocarbohvdrazide (TCH), first introduced to TEM for en block staining of lipids and glvcomacromolecules with osmium black. Now TCH is also used for SEM. However, after ligand mediated osinification nonspecific osmium black precipitates were often found obscuring surface details with large diffuse aggregates or with dense particular deposits, 2-20 nm in size. Thus, only low magnification work was considered possible after TCH appl ication.

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