This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1002/adma.201505641. This article is protected by copyright. All rights reserved. DOI: 10.1002/adma.(please add manuscript number) Highly Sensitive Ambipolar Field Effect Transistor-Based Diketopyrrolopyrrole Copolymer for Selective Detection and Discrimination of Xylene Isomers Bin Wang, Tan-Phat Huynh, Weiwei Wu, Naseem Hayek, Thu Trang Do, John C. Cancilla, Jose S. Torrecilla, Masrur Morshed Nahid, John M. Colwell, Oz M. Gazit, Sreenivasa Reddy Puniredd, Christopher R. McNeill, Prashant Sonar,* and Hossam Haick* Dr. Bin Wang, Dr. Tan-Phat Huynh, Dr. Weiwei Wu, Naseem Hayek, Prof. Oz M. Gazit, Prof. Hossam Haick Department of Chemical Engineering and Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel. E-mail: hhossam@technion.ac.il John C. Cancilla, Prof. Jose S. Torrecilla Department of Chemical Engineering, Complutense University of Madrid, Madrid 28040, Spain