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- Title
Hg2+ Optical Fiber Sensor Based on LSPR Generated by Gold Nanoparticles Embedded in LBL Nano-Assembled Coatings.
- Authors
Martínez-Hernández, María Elena; Goicoechea, Javier; Arregui, Francisco J.
- Abstract
Mercury is an important contaminant since it is accumulated in the body of living beings, and very small concentrations are very dangerous in the long term. This paper reports the fabrication of a highly sensitive fiber optic sensor using the layer-by-layer nano-assembly technique with gold nanoparticles (AuNPs). The gold nanoparticles were obtained via a water-based synthesis route that use poly acrylic acid (PAA) as stabilizing agent, in the presence of a borane dimethylamine complex (DMAB) as reducing agent, giving PAA-capped AuNPs. The sensing mechanism is based on the alteration of the Localized Surface Plasmon Resonances (LSPR) generated by AuNPs thanks to the strong chemical affinity of metallic mercury towards gold, which lead to amalgam alloys.
- Subjects
OPTICAL fiber detectors; GOLD nanoparticles; SURFACE plasmon resonance; AMALGAMS (Alloys); CHEMICAL affinity; STABILIZING agents; GOLD ores
- Publication
Sensors (14248220), 2019, Vol 19, Issue 22, p4906
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s19224906