6 documents found, page 1 of 1
Simulation of plasmonic effects of Metal (Au,Ag and Al) NPs and rGO embedded in...
Stojkovic, Vladan; Louro, PaulaGraphene [1] is a material that has been extensively explored in recent years as a material with optical properties that enable its application as active material in sensing devices.In this work we will study plasmonic effects and optical properties of graphene and metal nanoparticles (AuNPs), comparing its results, whenever possible, with results obtained in previous studies. Analysis will be supported by simu...
Colour and image processing for output extraction of a LSPR sensor
Mansour, Rima; Stojkovic, Vladan; Vygranenko, Yuri; Lourenço, Paulo; Jesus, Rui; Fantoni, AlessandroSensors based on the Local Surface plasmon Resonance (LSPR) are attractive due to their simple structure and good sensitivity, but the expensive optoelectronic part of the device is limiting the practical applications. There is a need for new strategies to bring the excellent detection properties of LSPR sensors to the playground of low-cost devices and materials. In this work, it is proposed a novel approach t...
Characterization of AuNPs+rGO as a functionalized layer for LSPR sensors
Fantoni, Alessandro; Stojkovic, Vladan; Carvalho, Ana; Da Costa Ribeiro, Ana Paula; Alegria, ElisabeteGraphene-based materials have been extensively explored in recent years as valuable candidates as the key material for novel structures in the field, among many other applications, of sensing devices. This work reports a study about the applicability of rGO as a support for gold nanoparticles (AuNPs) prepared with an economic and eco-friendly method using phytochemicals present in tea extract at room temperatur...
Characterization of plasmonic effects in AuNP+rGO composite as a sensing layer f...
Fantoni, Alessandro; Stojkovic, Vladan; Fernandes, Miguel; Louro, Paula; Vieira, Manuela; Alegria, Elisabete; Da Costa Ribeiro, Ana Paula; Carvalho, AnaThis work deals with the production of a low-cost disposable biosensor for point of care applications. The proposed sensor is a plasmonic structure based on the Localized Surface Plasmon Resonance (LSPR) interaction of metal nanoparticles (MNPs), embedded into a matrix of reduced Graphene Oxide (rGO). After proper functionalization with selective antibodies (Ab), the efficiency of light extinction is controlled b...
Characterization of plasmonic effects in AuNP+rGO composite as a sensing layer f...
Fantoni, Alessandro; Stojkovic, Vladan; Fernandes, Miguel; Louro, Paula; Vieira, Manuela; Alegria, Elisabete; Da Costa Ribeiro, Ana Paula; Carvalho, AnaThis work deals with the production of a low-cost disposable biosensor for point of care applications. The proposed sensor is a plasmonic structure based on the Localized Surface Plasmon Resonance (LSPR) interaction of metal nanoparticles (MNPs), embedded into a matrix of reduced Graphene Oxide (rGO). After proper functionalization with selective antibodies (Ab), the efficiency of light extinction is controlled b...
Plasmonic properties of gold nanospheres coupled to reduced graphene oxide for ...
Fantoni, Alessandro; Stojkovic, Vladan; Fernandes, Miguel; Vieira, Manuela; Alegria, Elisabete; Da Costa Ribeiro, Ana PaulaGraphene-based materials have been extensively explored in recent years as valuable candidates as the key material for novel structures in the field, among many other applications, of sensing devices. Reduced Graphene Oxide (rGO) is a type of chemically derived graphene, with equivalent optical properties but easier to be synthetized. This work reports a study about the applicability of rGO as a support for gol...