1.
Small
; 1(6): 613-8, 2005 Jun.
Artigo
em Inglês
| MEDLINE
| ID: mdl-17193494
Assuntos
Cristalização , Nanopartículas/química , Nanoestruturas/química , Pontos Quânticos , Cobalto/química , Eletroquímica , Temperatura Alta , Cinética , Metais/química , Microscopia Eletrônica de Varredura , Nanotecnologia/instrumentação , Nanotecnologia/métodos , Platina/química , Eletricidade Estática , Temperatura
2.
J Phys Chem B
; 109(18): 8718-22, 2005 May 12.
Artigo
em Inglês
| MEDLINE
| ID: mdl-16852032
RESUMO
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.