Fantoni, AlessandroStojkovic, VladanCarvalho, AnaDa Costa Ribeiro, Ana PaulaAlegria, Elisabete2020-07-152020-07-152020-03FANTONI, Alessandro; [et al] – Characterization of AuNPs+rGO as a functionalized layer for LSPR sensors. Materials Letters: X. ISSN 2590-1508. Vol. 5 (2020), pp. 1-52590-1508http://hdl.handle.net/10400.21/12039Este trabalho foi financiado pelo Concurso Anual para Projetos de Investigação, Desenvolvimento, Inovação e Criação Artística (IDI&CA) 2016 do Instituto Politécnico de Lisboa. Código de referência IPL/2018/aSiPhoto_ISELEste trabalho foi financiado pelo Concurso Anual para Projetos de Investigação, Desenvolvimento, Inovação e Criação Artística (IDI&CA) 2016 do Instituto Politécnico de Lisboa. Código de referência IPL/2019/BioPlas_ISELGraphene-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 temperature. The overall analysis is supported by simulation results about the LSPR effect in AuNPs-rGO, obtained by Mie theory and FDTD method. The residual phytochemicals are analysed as capping agent of the nanoparticles and their influence on the LSPR properties of the nanoparticles is outlined. The resulting composite is suitable for application as a low-cost sensing layer in biomedical LSPR sensor devices.engNanoparticlesThin filmsCarbon materialsOptical materials and propertiesjournal article10.1016/j.mlblux.2019.100032