Morphological Changes of Silver Nanoparticle Distributions in Glass Induced by Ultrashort Laser Pulses

Autor:	Heinrich Graener, H. Hofmeister, S. Hopfe, M. Kaempfe, G. Seifert,† and
Rok vydání:	2000
Předmět:	Materials science Physics::Optics Laser Molecular physics Silver nanoparticle Spectral line Surfaces Coatings and Films law.invention law Femtosecond Materials Chemistry Particle sense organs Irradiation Physical and Theoretical Chemistry Electron microscope Penetration depth
Zdroj:	The Journal of Physical Chemistry B. 104:11847-11852
ISSN:	1520-5207 1520-6106
Popis:	Persistent form modifications of silver nanoparticles in glass and the resulting dichroitic color changes induced by irradiation of a single intense femtosecond laser pulse were studied by means of high-resolution electron microscopy and spatially resolved optical transmission spectroscopy. Electron microscopy reveals a variety of morphological changes of the silver particles, in particular irregularly shaped particles surrounded by halolike structures consisting of very small silver clusters. The spectral analysis suggests that at lower intensities preferably desorption of silver into the glass matrix occurs producing isotropic spectral changes, while at higher intensities anisotropic spectra caused by particle deformation are observed. An analysis of the effects produced by different laser wavelengths allows one to correlate these findings with the variations of particle sizes depending on their penetration depth.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::affdd67b1d28e6da969cca21c9a3d917 https://doi.org/10.1021/jp002039w Zobrazit plný text záznamu