Effect of a thioalkane capping layer on the first hyperpolarizabilities of gold and silver nanoparticles

We have measured the first hyperpolarizabilities of thioalkane capped silver and gold metallic nanoparticles. The values found are βAgC 12−10 nm = (2.10 ± 0.23) × 10−26 esu for 10 nm diameter silver nanoparticles and βAuC 18−18 nm = (3.37 ± 0.08) × 10−26 esu for 18 nm diameter gold nanoparticles at...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2012-03, Vol.24 (12), p.124104-13
Main Authors: El Harfouch, Yara, Benichou, Emmanuel, Bertorelle, Franck, Russier-Antoine, Isabelle, Jonin, Christian, Lascoux, Noelle, Brevet, Pierre F
Format: Article
Language:English
Subjects:
Capping
Chemical bonds
Citrates
Condensed matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Gold
Nanocrystals and nanoparticles
Nanoparticles
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Physics
Silver
Wavelengths
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Summary:We have measured the first hyperpolarizabilities of thioalkane capped silver and gold metallic nanoparticles. The values found are βAgC 12−10 nm = (2.10 ± 0.23) × 10−26 esu for 10 nm diameter silver nanoparticles and βAuC 18−18 nm = (3.37 ± 0.08) × 10−26 esu for 18 nm diameter gold nanoparticles at the fundamental wavelength of 784 nm. By comparison to the corresponding values reported for citrate capped silver and gold metallic nanoparticles, after size corrections, decreases by factors of 4.3 and 6.5 respectively are observed. These decreases are tentatively attributed to the bonds formed between the gold and silver surface atoms and the sulfur atoms of the capping layer.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/24/12/124104