Dual fluorescent hollow silica nanofibers for in situ pH monitoring using an optical fiber† † Electronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d2na00943a

ABSTRACT: This study reports a sensitive and robust pH sensor based on dual fluorescent doped hollow silica nanofibers (hSNFs) for in situ and real-time pH monitoring. Fluorescein isothiocyanate (FITC) and tris(2,2′-bipyridyl)dichlororuthenium(ii) hexahydrate (Ru(BPY)3) were chosen as a pH sensitive dye and reference dye, respectively. hSNFs were synthesized using a two-step method in a reverse micelle system and were shown to have an average length of 6.20 μm and average diameter of 410 nm. The peak intensity ratio of FITC/Ru(BPY)3 was used to calibrate to solution pH changes. An optical-fiber-based fluorescence detection system was developed that enabled feasible and highly efficient near-field fluorescence detection. The developed system enables fully automated fluorescence detection, where compo

SUBMITTER: Zhou J 

PROVIDER: S-EPMC10089112 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature