Study of Electron Transport in Composite Films Below the Percolation Threshold

2006 ◽  
pp. 806-809 ◽  
Author(s):  
Rudolf Hrach ◽  
Stanislav Novák ◽  
Martin Švec ◽  
Jiří Škvor
Keyword(s):  
Electron Transport ◽  
Percolation Threshold ◽  
Composite Films

Electrical and morphological properties of composite films near the percolation threshold: models of composite structures

2004 ◽  
Vol 459 (1-2) ◽  
pp. 174-177 ◽  
Author(s):  
Rudolf Hrach ◽  
Martin Švec ◽  
Stanislav Novák ◽  
Dalibor Sedlák
Keyword(s):  
Percolation Threshold ◽  
Composite Structures ◽  
Composite Films ◽  
Morphological Properties ◽  
Threshold Models

Microstructure and percolation threshold characteristics of reactive sputtered Au–TiO2 granular composite films

2006 ◽  
Vol 352 (5) ◽  
pp. 386-389 ◽  
Author(s):  
Jun-Bo Han ◽  
Sha Ding ◽  
Dai-Jian Chen ◽  
Zhong-Hua Hao ◽  
Qu-Quan Wang
Keyword(s):  
Percolation Threshold ◽  
Composite Films ◽  
Granular Composite

Electrical and Dielectric Properties of Exfoliated Graphite/Polyimide Composite Films with Low Percolation Threshold

2012 ◽  
Vol 41 (9) ◽  
pp. 2439-2446 ◽  
Author(s):  
Li Yu ◽  
Yi-He Zhang ◽  
Jiwu Shang ◽  
Shan-Ming Ke ◽  
Wang-shu Tong ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Percolation Threshold ◽  
Composite Films ◽  
Exfoliated Graphite ◽  
Electrical And Dielectric Properties

LOCAL ARRANGEMENT EFFECTS ON THE STATISTICAL PROPERTIES OF THE EFFECTIVE CONDUCTIVITY AND FIELD IN 2D COMPOSITES

2001 ◽  
Vol 15 (30) ◽  
pp. 1459-1466 ◽  
Author(s):  
L. ZEKRI ◽  
N. ZEKRI
Keyword(s):  
Percolation Threshold ◽  
Local Field ◽  
Characteristic Frequency ◽  
Effective Conductivity ◽  
Composite Films ◽  
Statistical Properties ◽  
Dielectric Composite ◽  
Local Arrangement ◽  
Field Localization ◽  
Metallic Grains

We study the effect of the local arrangement of the metallic grains in metal-dielectric composite films on the statistical properties of the effective conductivity and the local field at the percolation threshold and for a characteristic frequency (where the conductivities of the two components are of the same magnitude). It is found that the segregation enhances sensitively the effective conductivity of the system as well as the local field. Further discussions on the field localization and other phenomena are provided.

scholarly journals Anisotropy of Percolation Threshold of BaTiO3-Ni0.5Zn0.5Fe2O4 Composite Films

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yu Tang ◽  
Ruixin Wang ◽  
Yi Zhang ◽  
Shun Li ◽  
Piyi Du
Keyword(s):  
Percolation Threshold ◽  
Composite Films

Electrical properties of stretchable and skin–mountable PDMS/MWCNT hybrid composite films for flexible strain sensors

2019 ◽  
Vol 53 (21) ◽  
pp. 3047-3060 ◽  
Author(s):  
M Nankali ◽  
NM Nouri ◽  
N Geran Malek ◽  
MA Sanjari Shahrezaei
Keyword(s):  
Electrical Properties ◽  
Percolation Threshold ◽  
Wearable Sensors ◽  
Composite Films ◽  
Strain Sensors ◽  
Gauge Factor ◽  
Threshold Region ◽  
Sem Images ◽  
Filtration Method ◽  
Conductive Films

Flexible strain sensors based on carbon nanofillers have great potential in the application of skin-adhesive sensors, wearable sensors, and tactile sensors, due to their superior electrical properties. Herein, the electrical properties of highly sensitive PDMS/MWCNT strain sensors made by vacuum filtration method were investigated. In order to obtain the electrical percolation curve of the flexible conductive films, first different samples were made with the same surface area but with different wt. % of CNTs. Then, depending on CNT content, the obtained conductive films exhibited initial electrical resistance in the range of 12.5 KΩ to 22.8 MΩ. The piezoresistive films with the CNT concentration of 1.4 to 2.9 [Formula: see text] had shown superior resistance drop, so this interval was determined as the percolation threshold region. According to the SEM images, the nanocomposite layer thickness of the flexible strain sensors in this region was 790 nm to 1210 nm. Afterward, the percolation curve was obtained using curve fitting to the experimental data and the exact value of the percolation threshold was defined as [Formula: see text]. Finally, in order to determine the minimum gauge factor ([Formula: see text]) of the sensors in percolation region, a flexible strain sensor in the upper limit of this region was selected and the piezoresistive properties of the selected sample were investigated.

Large third-order optical nonlinearity in Au:SiO2 composite films near the percolation threshold

1997 ◽  
Vol 70 (1) ◽  
pp. 1-3 ◽  
Author(s):  
H. B. Liao ◽  
R. F. Xiao ◽  
J. S. Fu ◽  
P. Yu ◽  
G. K. L. Wong ◽  
...  
Keyword(s):  
Percolation Threshold ◽  
Composite Films ◽  
Optical Nonlinearity ◽  
Third Order
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