title: Nonlinear enhancement of spontaneous biophoton emission of sweet potato by silver nanoparticles.
abstract: Ultraweak biophoton emission of cutting-injured sweet potato is enhanced by the incubation with Ag nanoparticles in a nonlinear way. The late peak of the emission after the cutting injury is amplified as much as 15 times, while only little amplification was identified for the emission measured immediately after the cutting. The effect requires the presence of nutritive media to support the active metabolic processes and is also affected by the timing of the addition of the Ag nanoparticles. Proposed mechanisms of reactive oxygen species generation and energy resonance transfer are discussed.
authors.affiliation: Department of Physics, University of Texas at Arlington, 502 Yates St. Arlington, TX 76019, USA.
authors.forename: Marius
authors.initials: M
authors.lastname: Hossu
authors.forename: Lun
authors.initials: L
authors.lastname: Ma
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
mesh_terms: D027723:Ipomoea batatas / Q000187:drug effects / Q000378:metabolism*; D053768:Metal Nanoparticles / Q000737:chemistry*; D017785:Photons; D017382:Reactive Oxygen Species / Q000378:metabolism; D012834:Silver / Q000737:chemistry*
chemical_list: D017382:Reactive Oxygen Species; D012834:Silver