We report on charge transport measurements through laterally contacted assemblies of Au nanoparticles capped with 11-mercaptoundecanoic acid ligands. Both alternating- and direct-current data indicate that although the nanoparticles behave as electrically isolated metallic islands, there is a significant influence from the nanoparticle environment, indicating the existence of a slow reorganization process linked to charge transport. On the basis of the observation of temperature-dependent hysteresis of charge tunneling, we propose that this process is due to proton transfer between the carboxylic acid tails of the ligands.

Hysteresis of charge tunneling in assemblies of carboxylic acid-modified gold nanoparticles

BIGNOZZI, Carlo Alberto;
2005

Abstract

We report on charge transport measurements through laterally contacted assemblies of Au nanoparticles capped with 11-mercaptoundecanoic acid ligands. Both alternating- and direct-current data indicate that although the nanoparticles behave as electrically isolated metallic islands, there is a significant influence from the nanoparticle environment, indicating the existence of a slow reorganization process linked to charge transport. On the basis of the observation of temperature-dependent hysteresis of charge tunneling, we propose that this process is due to proton transfer between the carboxylic acid tails of the ligands.
2005
Biancardo, M.; Quinn, A. J.; Floyd, L.; Mendes, P. M.; Briggs, S. S.; Preece, J. A.; Bignozzi, Carlo Alberto; Redmond, G.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1196671
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