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Electron energy-loss spectroscopy (EELS) of surface plasmons in single silver nanoparticles and dimers: influence of beam damage and mapping of dark modes

Koh, A.L. and Bao, K. and Khan, I. and Smith, W.E. and Kothleitner, G. and Nordlander, P. and Maier, S.A. and McComb, D.W. (2009) Electron energy-loss spectroscopy (EELS) of surface plasmons in single silver nanoparticles and dimers: influence of beam damage and mapping of dark modes. ACS Nano, 3 (10). pp. 3015-3022. ISSN 1936-0851

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Abstract

We demonstrate the use of a scanning transmission electron microscope (STEM) equipped with a monochromator and an electron energy loss (EEL) spectrometer as a powerful tool to study localized surface plasmons in metallic nanoparticles. We find that plasmon modes can be influenced by changes in nanostructure geometry and electron beam damage and show that it is possible to delineate the two effects through optimization of specimen preparation techniques and acquisition parameters. The results from the experimental mapping of bright and dark plasmon energies are in excellent agreement with the results from theoretical modeling.

Item type: Article
ID code: 18918
Keywords: electron energy-loss spectroscopy, localized surface plasmon, silver nanoparticles, plasmon hybridization model, scanning transmission electron microscopy, Chemistry, Physical and theoretical chemistry, Physics and Astronomy(all), Materials Science(all), Engineering(all)
Subjects: Science > Chemistry
Science > Chemistry > Physical and theoretical chemistry
Department: Faculty of Science > Pure and Applied Chemistry
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 18 Jun 2010 11:46
    Last modified: 05 Sep 2014 03:59
    URI: http://strathprints.strath.ac.uk/id/eprint/18918

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