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Morphology of supported silver nanoparticles characterized by optical and thermal desorption spectroscopy

MPG-Autoren
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Wolf,  Martin
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Zitation

Hotzel, A., Mathies, S., Starr, D. E., Grujic, A., & Wolf, M. (2011). Morphology of supported silver nanoparticles characterized by optical and thermal desorption spectroscopy. Applied Physics B: Lasers and Optics, 103, 171-187. doi:10.1007/s00340-010-4363-5.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0011-23D5-D
Zusammenfassung
Silver nanoparticles grown on a quartz substrate are investigated with optical and thermal desorption spectroscopy (TDS). Detailed information on the nanoparticle morphology is gained with new methods of data analysis. First, a fit of the extinction spectra, based on a comprehensive model derived for this purpose, allows an estimation of the effective particle–particle distance. Second, the total surface area of the particles is determined with TDS of xenon. Third, the dependence of the plasmon resonance position on the amount of adsorbed xenon is used as a measure of the average particle size. The results for these three parameters, which are critical for potential applications, are shown to be mutually consistent. The methods demonstrated here are complementary to scanning probe techniques which characterize the particle morphology on a microscopic length scale.