title: Emission enhancement of laser-induced breakdown spectroscopy by localized surface plasmon resonance for analyzing plant nutrients.
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.
authors.affiliation: Department of Opto-Mechatronics, Faculty of Systems Engineering, Wakayama University, Wakayama, Japan. ohta@sys.wakayama-u.ac.jp
authors.forename: Takayuki
authors.initials: T
authors.lastname: Ohta
authors.forename: Masafumi
authors.initials: M
authors.lastname: Ito
authors.forename: Takashi
authors.initials: T
authors.lastname: Kotani
authors.forename: Takeaki
authors.initials: T
authors.lastname: Hattori
mesh_terms: D002957:Citrus / Q000737:chemistry*; D003102:Colloids / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D007834:Lasers; D018515:Plant Leaves / Q000737:chemistry*; D029793:Rhododendron / Q000737:chemistry*; D012680:Sensitivity and Specificity; D012834:Silver / Q000737:chemistry; D013057:Spectrum Analysis / Q000379:methods*; D020349:Surface Plasmon Resonance / Q000379:methods*; D013499:Surface Properties
chemical_list: D003102:Colloids; D012834:Silver; D006046:Gold