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Construction of wire electrodesand 3D woven logicas a potential technology forneuroprosthetic implants
Neuronic Engineering, School of Technology and Health, Royal Institute of Technology, Alfred Nobels Allé 10, 146 57 Huddinge, Stockholm, Sweden.
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.
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2008 (English)In: IEEE Transactions on Biomedical Engineering, ISSN 0018-9294Article in journal (Other academic) Submitted
Abstract [en]

New strategies to improve neuron coupling to neuroelectronic implants are needed. In particular, tomaintain functional coupling between implant and neurons, foreign body response like encapsulation must meminimized. Apart from modifying materials to mitigate encapsulation it has been shown that with extremely thinstructures, encapsulation will be less pronounced. We here utilize wire electrochemical transistors (WECTs) usingconducting polymer coated fibers. Monofilaments down to 10 μm can be successfully coated and weaved intocomplex networks with built in logic functions, so called textile logic. Such systems can control signal patterns at alarge number of electrode terminals from a few addressing fibres. Not only is fibre size in the range where lessencapsulation is expected but textiles are known to make successful implants because of their soft and flexiblemechanical properties. Further, textile fabrication provides versatility and even three dimensional networks arepossible. Three possible architectures for neuroelectronic systems are discussed. WECTs are sensitive to dehydrationand materials for better durability or improved encapsulation is needed for stable performance in biologicalenvironments.

Place, publisher, year, edition, pages
Keyword [en]
Conducting polymers, functional electrical stimulation, textile electronics
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-20804OAI: diva2:236150
Available from: 2009-09-21 Created: 2009-09-21
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.
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1224
National Category
Natural Sciences
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)
Available from: 2009-09-21 Created: 2009-04-08 Last updated: 2010-08-30Bibliographically approved

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Biomolecular and Organic Electronics The Institute of TechnologyImage Coding
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