Short Communication Open Access
Volume 1 | Issue 2 | DOI: https://doi.org/10.33696/Nanotechnol.1.009

Ligand-free Few Atoms Ag Nanoclusters Synthesis and Their Potential Application as Photocatalytic Agents

  • 1Centro de Investigaciones Ópticas (CIOp), (CONICET - CIC - UNLP), Camino Centenario y 506, 1897 Gonnet, La Plata, Argentina
  • 2Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Diagonal 113 y 64 (CONICET-UNLP); on leave from CIOp
  • 3Instituto de Física “Gleb Wataghin”, Universidade Estadual de Campinas, Campinas, Brazil
  • 4Facultad de Ingeniería, UNLP, 115 y 49, 1900 La Plata, Buenos Aires, Argentina
+ Affiliations - Affiliations

Corresponding Author

Lucía B. Scaffardi, lucias@ciop.unlp.edu.ar; Jesica M. J. Santillán, jesicas@ciop.unlp.edu.ar

Received Date: August 25, 2020

Accepted Date: September 17, 2020


We have implemented ultrafast laser ablation synthesis in liquids together with mechanical centrifugation to obtain ligand-free silver nanoclusters (Ag NCs). Given the nature of this technique, the NCs colloids produced are highly pure which avoids additional cleaning protocols. The mechanical centrifugation of the colloids helps to separate the NCs from their larger counterparts (nanoparticles (NPs)), present in the suspension. Synthesized NC colloids are studied by fluorescence spectroscopy observing UV bands corresponding with HOMO-LUMO cluster transitions, and HRTEM measurements where Ag NCs clouds and Ag atomic clusters are observed. Finally, the photocatalytic response of the Ag NCs was studied by the degradation of the standard molecule Methylene Blue (MB) in interaction with white light. It was observed that when MB and Ag NCs are mixed in the solution, degradation of MB is much faster, indicating the strong photocatalytic response of NCs, even at low concentrations.

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