Thin polyaniline films in EMI shielding

Tapio Mäkelä, Seppo Pienimaa, Tapani Taka, Salme Jussila, Heikki Isotalo

Research output: Contribution to journalArticleScientificpeer-review

152 Citations (Scopus)

Abstract

Electromagnetic interference shielding efficiency has been measured for highly electrically conducting Polyaniline-Camphor Sulfonic Acid. The polymer is spin coated from m-cresol solution on an electrically insulating substrate as a 1–30 μm thick layer having a conductivity of 10–100 S/cm. The shielding efficiencies (SE) for these electrically thin polyaniline films have been measured in the near-field with a dual-chamber box and in the far-field with a transmission line method in the frequency range 0.1–1000 MHz. The measurements show that SE depends primarily on the surface resistance both in the far-field and the near-field. An additional effect >10 dB is seen when the two layer structure is measured in the near field. By using layer structures, the SE is >40 dB up to ca. 100 MHz in the near-field and 39 dB at 1 GHz in the far-field.

Original languageEnglish
Pages (from-to)1335 - 1336
Number of pages2
JournalSynthetic Metals
Volume85
Issue number1-3
DOIs
Publication statusPublished - 1997
MoE publication typeA1 Journal article-refereed

Fingerprint

Polyaniline
Shielding
shielding
near fields
far fields
thin films
Camphor
camphor
cresols
Surface resistance
Sulfonic Acids
electromagnetic interference
sulfonic acid
Signal interference
transmission lines
boxes
Electric lines
Polymers
chambers
frequency ranges

Cite this

Mäkelä, T., Pienimaa, S., Taka, T., Jussila, S., & Isotalo, H. (1997). Thin polyaniline films in EMI shielding. Synthetic Metals, 85(1-3), 1335 - 1336. https://doi.org/10.1016/S0379-6779(97)80259-7
Mäkelä, Tapio ; Pienimaa, Seppo ; Taka, Tapani ; Jussila, Salme ; Isotalo, Heikki. / Thin polyaniline films in EMI shielding. In: Synthetic Metals. 1997 ; Vol. 85, No. 1-3. pp. 1335 - 1336.
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abstract = "Electromagnetic interference shielding efficiency has been measured for highly electrically conducting Polyaniline-Camphor Sulfonic Acid. The polymer is spin coated from m-cresol solution on an electrically insulating substrate as a 1–30 μm thick layer having a conductivity of 10–100 S/cm. The shielding efficiencies (SE) for these electrically thin polyaniline films have been measured in the near-field with a dual-chamber box and in the far-field with a transmission line method in the frequency range 0.1–1000 MHz. The measurements show that SE depends primarily on the surface resistance both in the far-field and the near-field. An additional effect >10 dB is seen when the two layer structure is measured in the near field. By using layer structures, the SE is >40 dB up to ca. 100 MHz in the near-field and 39 dB at 1 GHz in the far-field.",
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Mäkelä, T, Pienimaa, S, Taka, T, Jussila, S & Isotalo, H 1997, 'Thin polyaniline films in EMI shielding', Synthetic Metals, vol. 85, no. 1-3, pp. 1335 - 1336. https://doi.org/10.1016/S0379-6779(97)80259-7

Thin polyaniline films in EMI shielding. / Mäkelä, Tapio; Pienimaa, Seppo; Taka, Tapani; Jussila, Salme; Isotalo, Heikki.

In: Synthetic Metals, Vol. 85, No. 1-3, 1997, p. 1335 - 1336.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Thin polyaniline films in EMI shielding

AU - Mäkelä, Tapio

AU - Pienimaa, Seppo

AU - Taka, Tapani

AU - Jussila, Salme

AU - Isotalo, Heikki

PY - 1997

Y1 - 1997

N2 - Electromagnetic interference shielding efficiency has been measured for highly electrically conducting Polyaniline-Camphor Sulfonic Acid. The polymer is spin coated from m-cresol solution on an electrically insulating substrate as a 1–30 μm thick layer having a conductivity of 10–100 S/cm. The shielding efficiencies (SE) for these electrically thin polyaniline films have been measured in the near-field with a dual-chamber box and in the far-field with a transmission line method in the frequency range 0.1–1000 MHz. The measurements show that SE depends primarily on the surface resistance both in the far-field and the near-field. An additional effect >10 dB is seen when the two layer structure is measured in the near field. By using layer structures, the SE is >40 dB up to ca. 100 MHz in the near-field and 39 dB at 1 GHz in the far-field.

AB - Electromagnetic interference shielding efficiency has been measured for highly electrically conducting Polyaniline-Camphor Sulfonic Acid. The polymer is spin coated from m-cresol solution on an electrically insulating substrate as a 1–30 μm thick layer having a conductivity of 10–100 S/cm. The shielding efficiencies (SE) for these electrically thin polyaniline films have been measured in the near-field with a dual-chamber box and in the far-field with a transmission line method in the frequency range 0.1–1000 MHz. The measurements show that SE depends primarily on the surface resistance both in the far-field and the near-field. An additional effect >10 dB is seen when the two layer structure is measured in the near field. By using layer structures, the SE is >40 dB up to ca. 100 MHz in the near-field and 39 dB at 1 GHz in the far-field.

U2 - 10.1016/S0379-6779(97)80259-7

DO - 10.1016/S0379-6779(97)80259-7

M3 - Article

VL - 85

SP - 1335

EP - 1336

JO - Synthetic Metals

JF - Synthetic Metals

SN - 0379-6779

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Mäkelä T, Pienimaa S, Taka T, Jussila S, Isotalo H. Thin polyaniline films in EMI shielding. Synthetic Metals. 1997;85(1-3):1335 - 1336. https://doi.org/10.1016/S0379-6779(97)80259-7