Graphene-like (GL) layers and eumelanin-based graphene-like (EUGL) hybrids have been investigated through THz time domain spectroscopy. The interest in these materials lies on their peculiar chemical-physical properties: the former are conductive water stable materials, whereas the latter are biocompatible materials with good conductive and adhesive properties. Both exhibit promising optoelectronic and bioelectronic applications. We measured mixtures of GL layers or EUGL hybrids with KBr, shaped in pellets with uniform thickness, in order to circumvent problems related to sample inhomogeneity and roughness. A mean field theory was applied to extract direct information on permittivity and conductivity. Data have been carefully fitted through the Drude-Smith theory, confirming the conductive nature of the hybrid materials. The results show that EUGL hybrid-based devices can be promising for the next generation of printable bio-circuits.

THz spectroscopy on graphene-like materials for bio-compatible devices / Papari, Gian Paolo; Gargiulo, Valentina; Alfè, Michela; Di Capua, Roberto; Pezzella, Alessandro; Andreone, Antonello. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 121:14(2017), pp. 145107-1-145107-9. [10.1063/1.4980106]

THz spectroscopy on graphene-like materials for bio-compatible devices

Papari, Gian Paolo;Di Capua, Roberto;Pezzella, Alessandro;Andreone, Antonello
2017

Abstract

Graphene-like (GL) layers and eumelanin-based graphene-like (EUGL) hybrids have been investigated through THz time domain spectroscopy. The interest in these materials lies on their peculiar chemical-physical properties: the former are conductive water stable materials, whereas the latter are biocompatible materials with good conductive and adhesive properties. Both exhibit promising optoelectronic and bioelectronic applications. We measured mixtures of GL layers or EUGL hybrids with KBr, shaped in pellets with uniform thickness, in order to circumvent problems related to sample inhomogeneity and roughness. A mean field theory was applied to extract direct information on permittivity and conductivity. Data have been carefully fitted through the Drude-Smith theory, confirming the conductive nature of the hybrid materials. The results show that EUGL hybrid-based devices can be promising for the next generation of printable bio-circuits.
2017
THz spectroscopy on graphene-like materials for bio-compatible devices / Papari, Gian Paolo; Gargiulo, Valentina; Alfè, Michela; Di Capua, Roberto; Pezzella, Alessandro; Andreone, Antonello. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 121:14(2017), pp. 145107-1-145107-9. [10.1063/1.4980106]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/702365
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