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Related Experiment Video

Updated: May 19, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Real-Time Electron-Electron Scattering Dynamics in Plasmonic Nanostructures.

Yanze Wu1, George C Schatz1

  • 1Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.

ACS Nano
|May 18, 2026
PubMed
Summary

Electron-electron scattering significantly impacts hot carrier relaxation in plasmonic nanoparticles. Our new method reveals energy-dependent dynamics and quantum effects in nanoclusters, crucial for designing advanced nanomaterials.

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Area of Science:

  • * Computational Nanoscience
  • * Materials Physics
  • * Quantum Chemistry

Background:

  • * Electron-electron scattering is a key mechanism for hot carrier relaxation in plasmonic nanoparticles.
  • * Understanding these dynamics is vital for designing plasmonic nanostructures for optical applications and catalysis.
  • * Accurate modeling requires self-consistent treatment of scattering effects during and after plasmon excitation.

Purpose of the Study:

  • * To develop and apply a computational method for simulating electron-electron scattering in plasmonic nanoclusters.
  • * To investigate quasiparticle lifetime, population, and coherence dynamics in silver, gold, and aluminum nanoclusters.
  • * To explore the influence of size and quantum effects on electron dynamics.

Main Methods:

Keywords:
electron−electron scatteringhot carrier relaxationplasmonic nanoparticlesreal-time TDDFT

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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy
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Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy

Published on: June 5, 2019

Related Experiment Videos

Last Updated: May 19, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
09:29

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy
08:54

Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy

Published on: June 5, 2019

  • * Real-time time-dependent density functional tight-binding (RT-TDDFTB) simulations.
  • * Lindblad quantum Boltzmann equation (QBE) incorporating screened electron-electron interactions via random phase approximation.
  • * Investigation of nanoclusters ranging from 1.5 to 2.6 nm.

Main Results:

  • * Quasiparticle lifetimes and relaxation dynamics are strongly energy-dependent, accelerating at higher energies.
  • * In clusters < 2 nm, discrete energy levels cause fluctuating lifetimes and deviate from thermalization.
  • * Larger nanoparticles exhibit behavior transitioning towards bulk metallic properties.
  • * Decoherence of plasmon resonance occurs on a 10 fs timescale, faster than population relaxation.
  • * Gold's 5d-band and interband transitions influence relaxation and introduce longer decoherence processes.

Conclusions:

  • * The RT-TDDFTB+QBE method provides a robust framework for including electron-electron scattering in metallic systems.
  • * Tight-binding methods can accurately model electron dynamics in nanoclusters over ps timescales.
  • * The study elucidates the transition from molecular to metallic behavior in nanoclusters based on size-dependent electron dynamics.