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Related Experiment Video

Updated: Jun 17, 2026

Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy
10:59

Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy

Published on: May 12, 2023

Electrochemistry on a localized surface plasmon resonance sensor.

Takumi Sannomiya1, Harald Dermutz, Christian Hafner

  • 1Laboratory of Biosensors and Bioelectronics, Department of Information Technology and Electrical Engineering, ETH Zürich, Zürich, Switzerland.

Langmuir : the ACS Journal of Surfaces and Colloids
|December 22, 2009
PubMed
Summary

This study combined localized surface plasmon resonance (LSPR) sensing with electrochemistry to monitor gold nanoparticle behavior. Researchers observed gold dissolution and redeposition, impacting nanoparticle size and conformation, crucial for future plasmonic-electrochemical sensors.

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Area of Science:

  • Nanotechnology
  • Electrochemistry
  • Plasmonics

Background:

  • Localized surface plasmon resonance (LSPR) sensors offer sensitive detection.
  • Integrating LSPR with electrochemistry provides simultaneous optical and electrical monitoring.
  • Gold nanoparticles on conductive substrates are key for such hybrid sensors.

Purpose of the Study:

  • To investigate the optical signal of LSPR sensors coupled with electrochemistry.
  • To understand surface reactions on gold nanoparticles during electrochemical potential changes.
  • To explore the potential for combined plasmonic-electrochemical sensing platforms.

Main Methods:

  • Immobilizing gold nanoparticles on indium tin oxide (ITO) electrodes.
  • Synchronizing cyclic voltammetry with LSPR sensing.

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A Label-free Technique for the Spatio-temporal Imaging of Single Cell Secretions
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Published on: November 23, 2015

Related Experiment Videos

Last Updated: Jun 17, 2026

Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy
10:59

Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy

Published on: May 12, 2023

A Label-free Technique for the Spatio-temporal Imaging of Single Cell Secretions
09:09

A Label-free Technique for the Spatio-temporal Imaging of Single Cell Secretions

Published on: November 23, 2015

  • Utilizing multiple multipole program (MMP) simulations.

    • Main Results:

    • Detected optical signals linearly correlated with applied potential in the capacitive charging regime.
    • Observed gold dissolution above oxidation potential and redeposition during reduction, altering nanoparticle size and conformation.
    • Identified slower potential establishment at lower salt concentrations.
    • Simulations suggested lossy layer formation due to gold charge depletion and ion adsorption.

    Conclusions:

    • The study demonstrates the capability of synchronized LSPR and electrochemistry for real-time monitoring of nanoparticle surface dynamics.
    • Results highlight the electrochemical influence on gold nanoparticle morphology, critical for sensor stability and performance.
    • Findings are significant for developing advanced hybrid plasmonic-electrochemical sensors.