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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.

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

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Published on: January 3, 2016

Plasmon ruler with angstrom length resolution.

Ryan T Hill1, Jack J Mock, Angus Hucknall

  • 1Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, North Carolina 27708, USA. ryan.hill@duke.edu

ACS Nano
|September 13, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces a plasmon nanoruler for extreme plasmonic coupling investigations. The film-nanoparticle (film-NP) system shows extreme sensitivity, with spectral shifts up to 5 nm per angstrom change in separation distance.

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Area of Science:

  • Plasmonics
  • Nanotechnology
  • Surface Science

Background:

  • Plasmonic coupling is crucial for nanoscience applications.
  • Investigating extreme sensitivity requires precise nanoscale control.
  • Existing models may not fully describe plasmonic behavior at ultrasmall gaps.

Purpose of the Study:

  • To demonstrate a plasmon nanoruler for extreme plasmonic coupling.
  • To investigate the sensitivity limits of plasmonic coupling.
  • To probe plasmonic behavior at sub-nanometer separation distances.

Main Methods:

  • Utilized a coupled film nanoparticle (film-NP) format.
  • Precisely controlled plasmonic gap dimensions using ultrathin molecular spacer layers.
  • Employed extinction and scattering measurements on ensembles of film-NPs.

Main Results:

  • The film-NP plasmon nanoruler exhibited extreme sensitivity at short separations (5-20 Å).
  • Observed spectral shifts up to 5 nm per 1 Å change in separation distance.
  • Demonstrated the need for quantum or semiclassical models for gaps < few nanometers.

Conclusions:

  • The film-NP plasmon nanoruler is highly sensitive and reliable at ultrasmall gaps.
  • Plasmonic coupling remains strong even at the smallest probed gap sizes.
  • This system enables probing of plasmonic behavior beyond classical models.