title: An Analytical Quantum Model to Calculate Fluorescence Enhancement of a Molecule in Vicinity of a Sub-10 nm Metal Nanoparticle.
abstract: An analytical quantum model is used to calculate electrical permittivity of a metal nanoparticle located in an adjacent molecule. Different parameters, such as radiative and non-radiative decay rates, quantum yield, electrical field enhancement factor, and fluorescence enhancement are calculated by such a model and they are compared with those obtained by using the classical Drude model. It is observed that using an analytical quantum model presents a higher enhancement factor, up to 30%, as compared to classical model for nanoparticles smaller than 10 nm. Furthermore, the results are in better agreement with those experimentally realized.
authors.affiliation: Laser and Plasma Institution, Shahid Baheshti University, Tehran, Iran.
authors.forename: Zahra
authors.initials: Z
authors.lastname: Bagheri
authors.affiliation: Laser and Plasma Institution, Shahid Baheshti University, Tehran, Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Massudi
keywords: Quantum plasmonics particle; analytical quantum model; drude model; molecule–nanoparticle interaction