Hybrid Oxygen-Responsive Reflective Bragg Grating Platforms

摘要

Oxygen responsive sensor platforms were fabricated by pin printing tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II) ([Ru(dpp)3]²⁺) doped sols onto wavelength tuned reflective Bragg gratings. In an epi-luminescence configuration, these Bragg gratings (Gr) were designed to reflect selectively the O2 responsive [Ru(dpp)3]²⁺ emission toward the detector to enhance the detected signal magnitude. The xerogel based sensors were formed onto: (i) glass (XGl), (ii) directly on top of the grating (XGrGl), or (iii) on the glass substrate opposite the grating (XGlGr). The results show that all sensors exhibit linear, statistically equivalent O2 sensitivities and the XGrGl platform yields up to an 8 fold increase in relative detected analytical signal (RDAS) in comparison to the control (XGl) platform.