Black phosphorus integrated tilted fiber grating for ultrasensitive heavy metal sensing

Liu, C., Sun, Z., Zhang, L., Lv, J., Yu, X.f., Zhang, L. and Chen, X. (2017). Black phosphorus integrated tilted fiber grating for ultrasensitive heavy metal sensing. Sensors and Actuators, B: Chemical, In pre ,

Abstract

We propose an integrated black phosphorus (BP)-tilted fiber grating (TFG) configuration as an enhanced light-matter interaction platform for heavy metal chemical sensing. We synthesized BP nanosheets by using a liquid-phase exfoliation method and developed an in-situ layer-by-layer (i-LbL) technique for BP nanosheets deposition. These approaches secured high-quality BP coating on specific fiber cylindrical surface with strong adhesion as well as a prospective thickness control. By taking advantage of i-LbL deposition, the unique optical tunable features including coating thickness-dependent polarization and polarization- selective coupling have been experimentally observed. Furthermore, the BP-TFG was exploited as the first BP-fiber optic chemical sensor for heavy metal Pb2+ ions detection, demonstrating significant performance of ultrahigh sensitivity up to 0.5 × 10−3 dB/ppb, much lower limit of detection down to 0.25 ppb, and extremely wide concentration range from 0.1 ppb to 1.5 × 107 ppb. We believe that this BP-fiber optic architecture opens the path as an optical platform for superior chemical sensing and biomedical applications.

Publication DOI: https://doi.org/10.1016/j.snb.2017.11.022
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Life & Health Sciences
Additional Information: © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/. Funding: EC FP7 PIRSES-GA-2013-612267 (iPhoto-Bio), the Sêr Cymru NRN Fund (NRN097), and National Natural Science Foundation of China (No. 51672305, No. 81501577).
Uncontrolled Keywords: Black phosphorus; Nanomaterials; Fiber grating; Optical sensor; Chemical sensor; Heavy metal
Full Text Link: http://linkingh ... 925400517321536
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Published Online Date: 2017-11-07
Authors: Liu, C.
Sun, Z.
Zhang, L.
Lv, J.
Yu, X.f.
Zhang, L.
Chen, X.

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