2022
2.
Giasafaki, D.; Mitzithra, C.; Belessi, V.; Filippakopoulou, T.; Koutsioukis, A.; Georgakilas, V.; Charalambopoulou, G.; Steriotis, T.
Graphene-Based Composites with Silver Nanowires for Electronic Applications Journal Article
In: Nanomaterials, vol. 12, iss. 19, no. 3443, 2022.
Abstract | Links | BibTeX | Tags: Conductive inks, few-layered graphene, functionalized multiwalled carbon nanotubes, functionalized reduced graphene oxide, Gravure, Printed electronics, silver nanowires
@article{Giasafaki2022,
title = {Graphene-Based Composites with Silver Nanowires for Electronic Applications},
author = {D. Giasafaki and C. Mitzithra and V. Belessi and T. Filippakopoulou and A. Koutsioukis and V. Georgakilas and G. Charalambopoulou and T. Steriotis },
doi = {https://doi.org/10.3390/nano12193443 },
year = {2022},
date = {2022-10-01},
urldate = {2022-10-01},
journal = {Nanomaterials},
volume = {12},
number = {3443},
issue = {19},
abstract = {Graphene/metal nanocomposites have shown a strong potential for use in electronic applications. In particular, the combination of silver nanowires (AgNWs) with graphene derivatives leads to the formation of an efficient conductive network, thus improving the electrical properties of a composite. This work focused on developing highly conductive hydrophilic hybrids of simultaneously functionalized and reduced graphene oxide (f-rGO) and AgNWs in different weight ratios by following two different synthetic routes: (a) the physical mixture of f-rGO and AgNWs, and (b) the in situ reduction of GO in the presence of AgNWs. In addition, the role of AgNWs in improving the electrical properties of graphene derivatives was further examined by mixing AgNWs with a hybrid of few-layered graphene with functionalized multiwalled carbon nanotubes (FLG/MWNT-f-OH). The studied materials showed a remarkable improvement in the overall electrical conductivity due to the synergistic effect of their components, which was proportional to the percentage of Ag and dependent on the procedure of the hybrid formation. One of the f-rGO/AgNWs composites was also selected for the preparation of gravure printing inks that were tested to determine their rheological and printing properties. All of the f-rGO/AgNWs composites were shown to be very promising materials for use as conductive inks for flexible electronics.},
keywords = {Conductive inks, few-layered graphene, functionalized multiwalled carbon nanotubes, functionalized reduced graphene oxide, Gravure, Printed electronics, silver nanowires},
pubstate = {published},
tppubtype = {article}
}
Graphene/metal nanocomposites have shown a strong potential for use in electronic applications. In particular, the combination of silver nanowires (AgNWs) with graphene derivatives leads to the formation of an efficient conductive network, thus improving the electrical properties of a composite. This work focused on developing highly conductive hydrophilic hybrids of simultaneously functionalized and reduced graphene oxide (f-rGO) and AgNWs in different weight ratios by following two different synthetic routes: (a) the physical mixture of f-rGO and AgNWs, and (b) the in situ reduction of GO in the presence of AgNWs. In addition, the role of AgNWs in improving the electrical properties of graphene derivatives was further examined by mixing AgNWs with a hybrid of few-layered graphene with functionalized multiwalled carbon nanotubes (FLG/MWNT-f-OH). The studied materials showed a remarkable improvement in the overall electrical conductivity due to the synergistic effect of their components, which was proportional to the percentage of Ag and dependent on the procedure of the hybrid formation. One of the f-rGO/AgNWs composites was also selected for the preparation of gravure printing inks that were tested to determine their rheological and printing properties. All of the f-rGO/AgNWs composites were shown to be very promising materials for use as conductive inks for flexible electronics.
2018
1.
Belessi, V.; Petridis, D.; Steriotis, T.; Spyrou, K.; Manolis, G. K.; Psycharis, V.; Georgakilas, V.
Simultaneous reduction and surface functionalization of graphene oxide for highly conductive and water dispersible graphene derivatives Journal Article
In: SN Applied Sciences, vol. 1, iss. 77, 2018.
Abstract | Links | BibTeX | Tags: Conductive inks, Gravure, Printed electronics, Reduced graphene oxide, Surface functionalization
@article{Belessi2018,
title = {Simultaneous reduction and surface functionalization of graphene oxide for highly conductive and water dispersible graphene derivatives},
author = {V. Belessi and D. Petridis and T. Steriotis and K. Spyrou and G. K. Manolis and V. Psycharis and V. Georgakilas },
doi = {https://doi.org/10.1007/s42452-018-0077-9},
year = {2018},
date = {2018-12-03},
urldate = {2018-12-03},
journal = {SN Applied Sciences},
volume = {1},
issue = {77},
abstract = {A simple and effective preparation method for the simultaneous reduction and functionalization of graphene oxide (rGO) by 2,4-diamino benzene sulfonic acid has been developed. The derivatives exhibit excellent conductivity and high dispersibility in various solvents. The successful preparation of rGO and the presence of the sulfonated aromatic diamine on rGO surface has been confirmed by infrared and X-ray photoelectron spectroscopy, while, the analysis by micro-Raman spectroscopy indicated that the reduction/functionalization alters the lattice structure of GO by the increment the defect density when the 2,4-diamino benzene sulfonic acid is used. Moreover, the study of the dried products by X-ray diffraction spectroscopy suggested the turbostratic restacking of the exfoliated rGO into graphite-like nanostructures. The obtained derivative of simultaneous reduction and functionalization of GO was used for the preparation of highly conductive water-based gravure ink, which in turn, was successfully applied in printing on various flexible substrates, demonstrating its great potentiality in graphene-based flexible and printed electronics applications.},
keywords = {Conductive inks, Gravure, Printed electronics, Reduced graphene oxide, Surface functionalization},
pubstate = {published},
tppubtype = {article}
}
A simple and effective preparation method for the simultaneous reduction and functionalization of graphene oxide (rGO) by 2,4-diamino benzene sulfonic acid has been developed. The derivatives exhibit excellent conductivity and high dispersibility in various solvents. The successful preparation of rGO and the presence of the sulfonated aromatic diamine on rGO surface has been confirmed by infrared and X-ray photoelectron spectroscopy, while, the analysis by micro-Raman spectroscopy indicated that the reduction/functionalization alters the lattice structure of GO by the increment the defect density when the 2,4-diamino benzene sulfonic acid is used. Moreover, the study of the dried products by X-ray diffraction spectroscopy suggested the turbostratic restacking of the exfoliated rGO into graphite-like nanostructures. The obtained derivative of simultaneous reduction and functionalization of GO was used for the preparation of highly conductive water-based gravure ink, which in turn, was successfully applied in printing on various flexible substrates, demonstrating its great potentiality in graphene-based flexible and printed electronics applications.