S. Bauer, R. Gerhard-Multhaupt, and G. M. Sessler
"Ferroelectrets: Soft Electroactive Foams for Transducers"
Physics Today 57 (2), 37-43 (February 2004)
(Japanese translation in: Parity 20 (7), 8-16 (July 2005)).
M. Wegener, W. Wirges, R. Gerhard-Multhaupt, M. Dansachmüller, R. Schwödiauer, S. Bauer-Gogonea, S. Bauer, M. Paajanen, H. Minkkinen, and J. Raukola
Applied Physics Letters 84, 392-394 (2004).
S. Bauer-Gogonea, S. Bauer, W. Wirges, and R. Gerhard-Multhaupt
"Dielectric investigation of photo-induced chromophore degradation in nonlinear optical side-chain polymer electrets"
IEEE Transactions on Dielectrics and Electrical Insulation 11, 80-89 (2004).
R. Gerhard-Multhaupt
"Ferroelectrets: Electrically charged polymer foams as quasi-piezoelectric transducer materials"
Sensoren und Mess-Systeme 2004, VDI-Berichte 1829, pp. 245-249 (VDI Verlag, Düsseldorf 2004)
M. Wegener, W. Wirges, J. Fohlmeister, B. Tiersch, and R. Gerhard-Multhaupt
"Two-step inflation of cellular polypropylene films: Void-thickness increase and enhanced electromechanical properties"
IEEE Trans. Diel. El. Insul. 37, 623-627 (2004).
A. Mellinger, F. Camacho González, and R. Gerhard-Multhaupt
"Photostimulated discharge in electret polymers: An alternative approach for investigating deep traps"
IEEE Trans. Diel. El. Insul. 37, 218-226 (2004).
P. Frübing, A. Kremmer, W. Neumann, R. Gerhard-Multhaupt, and I. L. Guy
"Dielectric relaxation in piezo-, pyro- and ferroelectric polyamide 11"
IEEE Trans. Diel. El. Insul. 37, 271-279 (2004).
M. Wegener, S. Bergweiler, W. Wirges, A. Pucher, and R. Gerhard-Multhaupt
"Voided space-charge electrets - Piezoelectric transducer materials for electro-acoustic applications"
Journal of the Audio Engineering Society, Convention Paper 6149, 8pp. (Audio Engineering Society, New York 2004).
M. Wegener, W. Künstler, and R. Gerhard-Multhaupt
"Piezo-, pyro- and ferroelectricity in poly(vinylidene fluoride-hexafluoropropylene) copolymer films"
Integrated Ferroelectrics 60, 111-116 (2004).
M. Wegener, E. Tuncer, W. Wirges, R. Gerhard-Multhaupt, M. Dansachmüller, S. Bauer-Gogonea, R. Schwödiauer, and S.Bauer
"Ferroelectrics: Highly anisotropic electrically charged polymer foams for electromechanical transducer applications"
Proceedings, 2004 IEEE International Ultrasonics, Ferroelectrics, and Frequency Control Joint 50th Anniversary Conference, Volume 2, pp. 1138-1141 (IEEE Service Center, Piscataway, NJ, USA 2004).
Axel Mellinger
Meas. Sci. Technol. 15, 1347-1353 (2004).
E. Tuncer, M. Wegener
"Elastic properties of highly anisotropic thin poly(propylene) foams"
Materials Letters 58, 2815-2818 (2004).
Michael Wegener and Werner Wirges
"Optimized Electromechanical Properties and Applications of Cellular Polypropylene - a New Voided Space-Charge Electret Material"
The Nano-Micro Interface (H.-J. Fecht, M. Werner, Editors) (WILEY-VCH, Weinheim, 2004) pp. 303-317 (2004).