Plasmons as Sensors pp 47-53 | Cite as
Analytical Methods
Abstract
Probably the most easiest characterization technique for nanoparticles is to measure the extinction spectrum of the sample. Since in this measurement an ensemble of particles is investigated, darkfield-microscopy is used to investigate the scattering spectrum on a single particle level. However, due to the diffraction limit of light, the nanoparticle’s shape cannot be resolved in a light microscope, and therefore a transmission electron microscope is used for this purpose. Since the stabilizing molecules on the particle's surface cannot be imaged by this technique, the influence to the particle size of these molecules is measured with an approach based on dynamic light scattering. These different measurement techniques are described in this chapter.
Keywords
Dynamic Light Scattering Speckle Pattern Resonance Wavelength Extinction Spectrum Single Particle LevelReferences
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