Daniela Rodrigues, Ana Neves, Isabel Schrijver, Monicacracium, Catarina Moreirinha, Adelaide Almeida, Helena Alves
The development of electronic textiles is one of the hottest topics in organic electronics. There are
already examples of smart textiles in garments for monitoring physiologic and biomechanical signals.
However, manufacturing schemes for current applications rely on the integration of off-the-shelf
electronic components mounted on a textile substrate. Such components are silicon-based, thus
unsuitable for applications where flexibility and fault-tolerance are required. Organic electronics is
an alternative to conventional silicon technology and can overcome these limitations. In this sense,
graphene, with high optical transparency and electrical conductivity, is a promising material to be
used as electrode. Graphene has also emerged as a novel green broad-spectrum antibacterial
material, with little bacterial resistance. Furthermore, due to good biocompatibility, graphene-based
nanocomposites with antibacterial properties have a wide range of applications, such as antibacterial
packaging, wound dressing or water disinfection.
We recently developed an approach consisted in coating specially designed polypropylene and
polylactide fibers with graphene and demonstrated that transparent monolayer graphene can coat
textile fibers by wet transfer, forming a highly conductive thread with negligible change in
A graphene solution was also developed, based on ultrasonic exfoliation of graphite, which allowed
textile coating by other solution methods such as drop cast and dip coating. Conductance of textile
coated with graphene solution is lower than CVD graphene, yet it can be substantial improved by
Finally, antibacterial activity against Gram-negative bacteria of textile with graphene and doped
graphene has been evaluated. Particularly, graphene solution and graphene doped with HNO3 and
H2O2 alone and on textile exhibit antibacterial properties. On the contrary, graphene CVD and
graphene doped with CsF, Cs2CO3 and CsF: Cs2CO3, alone and on textile, showed poor activity
against bacteria, demonstrating graphene tunable antibacterial properties.