Vicente Gómara, AdriánSantano Rivero, DesireeZubiate Orzanco, PabloUrrutia Azcona, AitorDel Villar, IgnacioRuiz Zamarreño, Carlos2020-05-262022-02-0120200925-400510.1016/j.snb.2019.126955https://academica-e.unavarra.es/handle/2454/36970In this work it is proved the ability to obtain lossy mode resonances (LMRs) in the transmission spectrum with multimode-coreless-multimode fibre optic structure coated with tin oxide on the coreless segment. The devices were characterized as a function of the surrounding medium refractive index and sensitivities of 7346.93 nm/RIU and 708.57 nm/RIU were attained for the first and the second LMR respectively. As an application proof of this technology, one of the devices was biofunctionalized and used for detecting goat anti-mouse IgG in concentrations ranging from 1 to 40 mg/L, with a limit of detection of 0.6 mg/L. This proves the ability of this simple structure to be used for biological, chemical or environmental applications.14 p.application/pdfeng© 2019 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0Optical fibre sensorResonanceThin-filmRefractometerBiosensorinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess