Transparent and flexible high frequency transmission lines based on composite structure comprising silver nanowires and polyvinyl butyral

Sang Woo Kim, Kwangho Kim, Wansoo Nah, Cheul Ro Lee, Seung Boo Jung, Jong Woong Kim

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Percolated networks of silver nanowires (AgNWs) have attracted intensive attention because of their remarkable mechanical stability, along with their excellent optical and electrical performance for the fabrication of flexible transparent electrodes. Most prior research has mainly focused on fabricating transparent electrodes that can be used in optoelectronic devices such as touch sensors, light emitting diodes, and photovoltaics. However, fabrication of transparent and flexible transmission lines designed to conduct alternating current of high frequency has not been reported so far. Herein, we developed highly transparent, mechanically stable transmission line by employing inverted layer processing (ILP) in order to embed the AgNWs just below the surface of a free-standing transparent polymer. For this, we synthesized polyvinyl butyral (PVB), which can be prepared from polyvinyl alcohol by reaction with butyraldehyde, for AgNW support. AgNWs deposited on a preliminary substrate (glass) were plasmonically sintered to significantly enhance their conductivity, and then transferred to the surface of the cured PVB film by the ILP. Measurements and simulation of specially designed coplanar waveguide circuits comprising AgNWs and PVB revealed that the fabricated electrode can simultaneously provide impressive transmission performance as well as excellent mechanical flexibility and transparency. An interesting finding was that the transmission characteristics and mechanical stability are in a trade-off relationship, which needs to be carefully considered in the design and selection of materials for the flexible transmission lines.

Original languageEnglish
Pages (from-to)25-32
Number of pages8
JournalComposites Science and Technology
Publication statusPublished - 2018 May 3

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) (No. 2015R1A4A1042417 ) grant funded by the Korean government (MSIP). Support was also provided by the Ministry of Trade, Industry and Energy (Grant No. N0002310 ); and the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) with granted financial resources from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20153030012110 ).

Publisher Copyright:
© 2018 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Engineering(all)


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