Electromagnetic interference shielding of polypyrrole nanostructures
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10420950" target="_blank" >RIV/00216208:11320/20:10420950 - isvavai.cz</a>
Alternative codes found
RIV/70883521:28610/20:63526434 RIV/60461373:22340/20:43921270
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=4jku4TMtQk" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=4jku4TMtQk</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.synthmet.2020.116573" target="_blank" >10.1016/j.synthmet.2020.116573</a>
Alternative languages
Result language
angličtina
Original language name
Electromagnetic interference shielding of polypyrrole nanostructures
Original language description
Polypyrrole (PPy) is an electrically conductive organic material perspective for application in the field of electromagnetic interference shielding (EMI). The presented fundamental study focuses on the shielding efficiency of three various morphologies of PPy (globules, nanotubes and microbarrels). Powdered samples in both protonated and deprotonated form were embedded at various concentrations (1, 3 and 5 % w/w) in a composite system with a transparent silicone matrix cured at temperatures 25 and 150 degrees C. The ability of PPy to reflect or absorb electromagnetic radiation in the C-band region covering the range from 5.85 to 8.2 GHz was evaluated. The relationship between the morphology of PPy, its DC and AC electrical conductivity, permittivity and shielding efficiency was studied. The PPy nanotubes with the DC conductivity of 60.8 S cm(-1) exhibited shielding efficiency S-21 = -13.27 dB at 5% w/w concentration in the composite, which corresponds to transparency of 21.7 % only. It was found that the magnitude of electrical conductivity together with the aspect ratio of PPy morphology determines the shielding efficiency whereas the type of morphology is responsible for absorption or reflection mechanism of EMI shielding. Hence, the appropriate adjustment of both the electrical conductivity and the morphology should be used in the future lightweight and flexible EMI shields with tunable shielding efficiency and mechanism of shielding.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Synthetic Metals
ISSN
0379-6779
e-ISSN
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Volume of the periodical
269
Issue of the periodical within the volume
Listopad
Country of publishing house
CH - SWITZERLAND
Number of pages
7
Pages from-to
116573
UT code for WoS article
000588106700036
EID of the result in the Scopus database
2-s2.0-85091576892