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Proceedings Paper

An optically transparent, flexible, patterned and conductive silk biopolymer film (Conference Presentation)

Paper Abstract

Transparent, flexible, and conducting films are of great interest for wearable electronics. For better biotic/abiotic interface, the films to integrate the electronics components requires the patterned surface conductors with optical transparency, smoothness, good electrical conductivity, along with the biofriendly traits of films. We focus on silk fibroin, a natural biopolymer extracted from the Bombyx mori cocoons, for this bioelectronics applications. Here we report an optically transparent, flexible, and patterned surface conductor on a silk film by burying a silver nanowires (AgNW) network below the surface of the silk film. The conducting silk film reveals high optical transparency of ~80% and the excellent electronic conductivity of ~15 Ω/sq, along with smooth surface. The integration of light emitting diode (LED) chip on the patterned electrodes confirms that the current can flow through the transparent and patterned electrodes on the silk film, and this result shows an application for integration of functional electronic/opto-electronic devices. Additionally, we fabricate a transparent and flexible radio frequency (RF) antenna and resistor on a silk film and apply these as a food sensor by monitoring the increasing resistance by the flow of gases from the spoiled food.

Paper Details

Date Published: 19 April 2017
PDF: 1 pages
Proc. SPIE 10101, Organic Photonic Materials and Devices XIX, 1010109 (19 April 2017); doi: 10.1117/12.2250690
Show Author Affiliations
Muhammad Umar, Ajou Univ. (Korea, Republic of)
Kyungtaek Min, Ajou Univ. (Korea, Republic of)
Sunghwan Kim, Ajou Univ (Korea, Republic of)

Published in SPIE Proceedings Vol. 10101:
Organic Photonic Materials and Devices XIX
Christopher E. Tabor; François Kajzar; Toshikuni Kaino; Yasuhiro Koike, Editor(s)

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