Laser-Induced Graphene on Optical Fibre: Towards Simple and Cost-Effective Electrochemical/Optical Lab-on-Fibre Bioplatforms

A 3D graphene foam made of interconnected multilayer flakes was produced on optical fibres (OF) by laser-induced transformation a polyimide (PI) film coated the OF cladding. This material, known as (LIG), explored in electrochemical detection and quantification dopamine (DA) at physiologically relevant concentrations presence most interfering molecules biological fluids, ascorbic acid (AA) uric (UA). The measured limit is 100 nM, linear range 0.1 to 5.0 μM maximum sensitivity µA µM−1 cm−2 obtained for LIG decorated with Pt nanoparticles (NPs). Moreover, immunity AA UA interference fouling attained decorating electrode NPs coating it Nafion. These figures merit underline potential these sensors DA paving way development hybrid electrochemical/optical sensing actuating platforms lab-on-fibre configuration, applications biomedical engineering. advantages this arrangement include possibility situ counterproofing, extended measuring ranges, photoelectrochemical probing inaccessible places. elegant approach can also provide simple cost-effective fabricate devices functionality, such medical probes added capabilities optogenetics combined local detection, among others.