期刊
JOURNAL OF BIOMEDICAL OPTICS
卷 23, 期 4, 页码 -出版社
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.JBO.23.4.047003
关键词
optical fiber sensor; surface plasmon resonance; biological sensing and sensors; visibility and imaging
资金
- National Natural Science Foundation of China [61727816, 61520106013, 61705031, 11474043]
- National Science Foundation for Postdoctoral Scientists of China [2017M610175]
We proposed a compact and cost-effective red-green dual-color fiber optic surface plasmon resonance (SPR) sensor based on the smartphone. Inherent color selectivity of phone cameras was utilized for realtime monitoring of red and green color channels simultaneously, which can reduce the chance of false detection and improve the sensitivity. Because there are no external prisms, complex optical lenses, or diffraction grating, simple optical configuration is realized. It has a linear response in a refractive index range of 1.326 to 1.351 (R-2 = 0.991) with a resolution of 2.3 x 10(-4) RIU. We apply it for immunoglobulin G (IgG) concentration measurement. Experimental results demonstrate that a linear SPR response was achieved for IgG concentrations varying from 0.02 to 0.30 mg/ml with good repeatability. It may find promising applications in the fields of public health and environment monitoring owing to its simple optics design and applicability in real-time, label-free biodetection. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).
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