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Penetration based CNT/Sol-Gel composite films and their remarkable electrical properties

: Erismis, H.; Nemec, D.; Geiss, M.; Skakalova, Viera; Ritter, Uwe; Kolaric, I.; Roth, Siegmar


Microelectronic engineering 88 (2011), No.8, pp.2513-2515
ISSN: 0167-9317
International Conference on Micro and Nano Engineering (MNE) <36, 2010, Genoa>
Journal Article, Conference Paper
Fraunhofer IPA ()
Carbon Nanotube (CNT); composite film; conductivity; Leitfähigkeit; sol-gel; Verbundwerkstoff; carbonfaserverstärkter Kunststoff; elektrische Leitfähigkeit

In this work we present a novel method for CNT/Sol-Gel film preparation, combining low resistivity and improved adhesion behaviour on glass substrates. Naturally occurring voids, with diameters of 50-100 nm, in sprayed CNT networks are used for Sol-Gel penetration via dip coating method. Thermal treatments, for composite film densification, in the range of 200-700°C are investigated and electrical properties were compared to identically treated reference samples with the same batch of nanotubes but without Sol-Gel. The resistivity of such composite films, with best value of 0.03 cm for MWNTs, is two orders of magnitudes lower than previously reported for CNT/Sol-Gel composites. Surprisingly the surface resistance of the composite film shows 25% improvement compared to thermally equal treated pure CNT films. In addition, crosscut adhesion behaviour is investigated, including tape test, showing good performance for composite films, where Sol-Gel acts as an adhesion promoter.