Role of supercontinuum in the fragmentation of colloidal gold nanoparticles in solution

Fabian A. Videla; Gustavo A. Torchia; Daniel S. Schinca; Lucía B. Scaffardi; Pablo Moreno; Cruz Méndez; Luis Roso; L. Giovanetti; Jose Ramallo Lopez

doi:10.1117/12.831032

24 August 2009 Role of supercontinuum in the fragmentation of colloidal gold nanoparticles in solution

Fabian A. Videla, Gustavo A. Torchia, Daniel S. Schinca, Lucía B. Scaffardi, Pablo Moreno, Cruz Méndez, Luis Roso, L. Giovanetti, Jose Ramallo Lopez

Author Affiliations +

Proceedings Volume 7405, Instrumentation, Metrology, and Standards for Nanomanufacturing III; 74050U (2009) https://doi.org/10.1117/12.831032
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States

Abstract

In this work we have studied the fragmentation of gold nanoparticles (NPs) after generation by femtosecond laser ablation of a solid target in deionized water. The fragmentation process was carried out using two different types of radiation: direct ultra-fast pulses and super-continuum radiation focused in the colloidal solution. In the former case, IR pulses were applied both in low and high fluences regime, while in the latter, super-continuum was generated by an external sapphire crystal. In this last case, to assess the effects of the different spectral bands present in the super-continuum for fragmentation, we have determined different efficiency regions. From the analysis of optical extinction spectra and Transmission Electron Microscopy (TEM) histograms we can conclude that the main mechanism is linear absorption in the visible region. Likewise, the super-continuum generated in water during fragmentation resulted more efficient than that obtained externally by the sapphire crystal. This fact can be attributed to the broadening of the water continuum band originated due to large intensity used for generation. TEM and Small Angle X-ray Scattering (SAXS) measurements support the results found from optical extinction spectroscopy.

Citation Download Citation

Fabian A. Videla, Gustavo A. Torchia, Daniel S. Schinca, Lucía B. Scaffardi, Pablo Moreno, Cruz Méndez, Luis Roso, L. Giovanetti, and Jose Ramallo Lopez "Role of supercontinuum in the fragmentation of colloidal gold nanoparticles in solution", Proc. SPIE 7405, Instrumentation, Metrology, and Standards for Nanomanufacturing III, 74050U (24 August 2009); https://doi.org/10.1117/12.831032

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available