Broadband NIR Optical Power Limiting of Few Layered Graphene Oxides

broadband NIRThe optical limiting behavior of few layered graphene oxide suspensions in 1-chloronapthalene and N-methyl-2-pyrrolidone was investigated under ns irradiation at various wavelengths in the Near Infrared spectral region. Strong broadband Near Infrared optical limiting was observed, attributed to excited state absorption or two photon absorption, the respective nonlinear scattering and thermal lensing being negligible for the range of fluencies used.

Reference: Applied Physics Letters, 2014, 104, Article number 191112.

Graphene based paint-like composites for electromagnetic shielding in the GHz frequency range

graphene basedThe last years, a strong need for innovative materials presenting efficient electromagnetic shielding appeared, due to the vast increase of applications of wireless communication systems. These new materials should combine excellent shielding effect (SE) in particular GHz frequency bands, ease of production, low weight and minimal cost. It is well established in literature that composites based on allotropic forms of carbon can exhibit all of the above criteria and have been considered as a very promising group of materials for electromagnetic shielding.

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Assessment of Field Aged Composite Insulators Condition in Crete

assessment of fieldThe performance of high voltage insulators utilized in overhead transmission and distribution lines is a key factor for the reliability of power delivery. At the last 20 years conventional insulators are increasingly replaced by composite insulators with the later providing considerably improved pollution performance. Specifically, in the case of silicone rubber, a more advanced hydrophobicity performance has been developed, capable of recovering the surface behavior even if hydrophilic contaminants are deposited on the material surface.

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Welcome

Center of Materials Technology and Photonics (CEMATEP) is a joint laboratory of the departments of the School of Applied Technology of the Technological Educational Institute of Crete (TEI Crete), established in 2003. Its activities are dedicated to the growth, study and application of novel materials and photonics.

Research activities

The research efforts in CEMATEP are focused on the exploitation of advanced thin films, nanostructures and nanocomposites suitable for applications like solar cells, chromic layers for solar control coatings, optoelectronics, photodetectors and organic electronics. CEMATEP is well equipped with state of the art facilities and its members have important scientific outcome as well as excellent national and international collaborations.