Резонансне пiдсилення iнтенсивностi збудження молекули в спектрi непружного розсiяння електронiв завдяки взаємодiї з плазмонами металевої нанооболонки

• Дата: 2018
• Автори: Goliney, I. Yu., Onykienko, Ye. V.
• Формат: Стаття
• Мова: English; Ukrainian
• Опубліковано: Publishing house "Academperiodika" 2018
• Теми: inelastic electron scattering; plasmon resonance; plasmon; nanoparticle; molecular excitation enhancement; непружне розсiяння електронiв (EELS); плазмонний резонанс; плазмон; наночастинка; пiдсилення збудження молекули
• Онлайн доступ: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018529
• Назва журналу: Ukrainian Journal of Physics

A quantum-mechanical model to calculate the electron energy-loss spectra (EELS) for the system of a closely located metallic nanoshell and a molecule has been developed. At the resonance between the molecular excitation and plasmon modes in the nanoshell, which can be provided by a proper choice of the ratio of the inner and outer nanoshell radii, the cross-section of inelastic electron scattering at the molecular excitation energy is shown to grow significantly, because the molecular transition borrows the oscillator strength from a plasmon. The enhancement of the inelastic electron scattering by the molecule makes it possible to observe molecular transitions with an electron microscope. The dependences of the EEL spectra on the relative arrangement of the molecule and the nanoshell, the ratio between the inner and outer nanoshell radii, and the scattering angle are plotted and analyzed.