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Towards woven logic from organic electronic fibres
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics . Linköping University, The Institute of Technology.
Linköping University, Department of Electrical Engineering, Image Coding. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics . Linköping University, The Institute of Technology.
2007 (English)In: Nature Materials, ISSN 1476-1122, E-ISSN 1476-4660, Vol. 6, 357-362 p.Article in journal (Refereed) Published
Abstract [en]

The use of organic polymers for electronic functions is mainly motivated by the low-end applications, where low cost rather than advanced performance is a driving force. Materials and processing methods must allow for cheap production. Printing of electronics using inkjets1 or classical printing methods has considerable potential to deliver this. Another technology that has been around for millennia is weaving using fibres. Integration of electronic functions within fabrics, with production methods fully compatible with textiles, is therefore of current interest, to enhance performance and extend functions of textiles2. Standard polymer field-effect transistors require well defined insulator thickness and high voltage3, so they have limited suitability for electronic textiles. Here we report a novel approach through the construction of wire electrochemical transistor (WECT) devices, and show that textile monofilaments with 10–100 µm diameters can be coated with continuous thin films of the conducting polythiophene poly(3,4-ethylenedioxythiophene), and used to create micro-scale WECTs on single fibres. We also demonstrate inverters and multiplexers for digital logic. This opens an avenue for three-dimensional polymer micro-electronics, where large-scale circuits can be designed and integrated directly into the three-dimensional structure of woven fibres.

Place, publisher, year, edition, pages
2007. Vol. 6, 357-362 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-17659DOI: 10.1038/nmat1884OAI: oai:DiVA.org:liu-17659DiVA: diva2:211081
Available from: 2009-04-08 Created: 2009-04-08 Last updated: 2017-12-13
In thesis
1. Organic electronics on micro and nano fibers: from e-textiles to biomolecular nanoelectronics
Open this publication in new window or tab >>Organic electronics on micro and nano fibers: from e-textiles to biomolecular nanoelectronics
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Research in the field of conjugated polymers (CPs) has led to the emergence of a number of interesting research areas and commercial applications, including solar cells, flexible displays, printed electronics, biosensors, e-textiles and more.

Some of the advantages of organic electronics materials, as compared to their inorganic counterparts, include high elasticity, and mechanical flexibility, which allows for a natural integration of CPs into fabrics, making them ideal for e-texile. In this thesis, a novel approach for creating transistors is presented, through the construction of electrolyte gated transistors, directly embedded on functional textile fibers. Furthermore theoretical and experimental results of the integration of functional woven devices based on these transistors are shown. The realization of woven digital logic and design schemes for devices that can be placed inside living tissue, for applications such as neural communication, are demonstrated.

Reducing feature sizes in organic electronics is necessity just as in conventional microelectronics, where Moore's law has been the most impressive demonstration of this over the past decades. Here the scheme of self-assembly (SA) of biomolecular/CP hybrid nano-structures is used for creating nano electronics. It is demonstrated that proteins in the form of amyloid fibrils can be coated with the highly conducting polythiophene derivative (PEDOT-S) through molecular self-assembly in water, to form conducting nanowire networks and nanodevices at molecular dimensions. In a second SA scheme, large area patterning of connected micro-nano lines and nano transistors from the conducting polymer PEDOT-S is demonstrated through assembly of these from fluids using soft lithography. Thereby the problems of large area nano patterning, and nano registration are solved for organic electronics. The construction of functional nanoscopic materials and components through molecular self-assembly has the potential to deliver totally new concepts, and may eventually allow cheap mass production of complex three dimensional nano electronic materials and devices.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2008. 102 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1224
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-17661 (URN)978-91-7393-763-4 (ISBN)
Public defence
2008-11-21, Planck, Fysikhuset, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Opponent
Supervisors
Available from: 2009-09-21 Created: 2009-04-08 Last updated: 2010-08-30Bibliographically approved

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Hamedi, MahiarForchheimer, RobertInganäs, Olle

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