1. School of Engineering and Materials ScienceQueen Mary University of London Mile End Road London E1 4NS UK
2. Nanoforce Technology Ltd. Mile End Road London E1 4NS UK
3. Laboratory of Functional Organic Materials and DevicesEindhoven University of Technology P.O. Box 513 5600 MB Eindhoven The Netherlands
4. Materials Engineering CentreWMGUniversity of Warwick Coventry CV4 7AL UK