Emission Enhancement of Laser-Induced Breakdown Spectroscopy by Localized Surface Plasmon Resonance for Analyzing Plant Nutrients

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Abstract:

We demonstrate the monitoring of plant nutrients in leaves of Citrus unshiu and Rhododendron obtusum using low-energy (<1 mJ) laser-induced breakdown spectroscopy. The raw plant leaf was successfully ablated without desiccation before laser irradiation, by applying metallic colloidal particles to the leaf surface. The emission intensity with the metallic particles was larger than that without the particles. This result indicates an improvement of the sensitivity and the detection limit of laser-induced breakdown spectroscopy. The emission enhancement was caused by localized surface plasmon resonance and was dependent on the size and material of metallic particles.

Keywords: LASER-INDUCED BREAKDOWN SPECTROSCOPY; LIBS; LOCALIZED SURFACE PLASMON RESONANCE; LSPR; PLANT NUTRIENTS

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370209788346896

Affiliations: 1: Department of Opto-Mechatronics, Faculty of Systems Engineering, Wakayama University, 930 Sakaedani, Wakayama 640-8510, Japan 2: Department of Opto-Electronics, Graduate School of Systems Engineering, Wakayama University, 930 Sakaedani, Wakayama 640-8510, Japan

Publication date: May 1, 2009

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