Functionalised graphene sheets as effective high dielectric constant fillers
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Updated: May 29, 2026

Development of a 3D Graphene Electrode Dielectrophoretic Device
Published on: June 22, 2014
Laura J Romasanta1, Marianella Hernández, Miguel A López-Manchado
1Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, Juan de la Cierva 3, 28006, Madrid, Spain. rverdejo@ictp.csic.es.
Abstract:
A new functionalised graphene sheet (FGS) filled poly(dimethyl)siloxane insulator nanocomposite has been developed with high dielectric constant, making it well suited for applications in flexible electronics. The dielectric permittivity increased tenfold at 10 Hz and 2 wt.% FGS, while preserving low dielectric losses and good mechanical properties. The presence of functional groups on the graphene sheet surface improved the compatibility nanofiller/polymer at the interface, reducing the polarisation process. This study demonstrates that functionalised graphene sheets are ideal nanofillers for the development of new polymer composites with high dielectric constant values.PACS: 78.20.Ci, 72.80.Tm, 62.23.Kn.
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