1. Innovation Centre W.E.I.Z. , Franz-Pichler-Str. 30, 8160 Weiz , Austria
2. Institute of Physics and Materials Science, Department of Material Sciences and Process Engineering , University of Natural Resources and Life Sciences Vienna (BOKU) , Peter-Jordan-Str. 82, 1190 Vienna , Austria
3. Institute of Wood Technology and Renewable Materials, Department of Material Sciences and Process Engineering , University of Natural Resources and Life Sciences Vienna (BOKU) , Konrad-Lorenz-Str. 24, 3430 Tulln , Austria