Studies of electrochemical quantized capacitance charging of surface ensembles of silver nanoparticles |
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| Affiliation: | 1. División de Ingeniería Química y Bioquímica, Tecnológico de Estudios Superiores de Ecatepec, Av. Tecnológico S/N, 55210Edo. de Méx., México;2. División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Tlalnepantla, Av. Tecnológico S/N, 5407Edo. de Méx., México;3. Departamento de Recursos de la Tierra, Universidad Autónoma Metropolitana-Lerma, Av. Hidalgo 46, 52006Edo. de Méx., México;4. División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Azcapotzalco, C.D. de México 02200, México;5. Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas 152, C.D. de México 07730, México |
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| Abstract: | CTAB-stabilized silver nanoparticles were synthesized by NaBH4 reduction. The as-prepared nanoparticles can be self-assembled on 3-mercaptopropionic acid (MPA) modified gold electrode, which was supported strongly by XPS measurements. Exceptional long-term stability of the as-prepared colloidal silver aqueous solution and the desorption of silver nanoparticle ensemble on MPA after alcohol rinsing proved that these CTAB molecules adsorbed on silver core formed interdigitated bilayer structure. DPV and differential capacitance measurements were performed to characterize the as-prepared silver nanoparticle ensemble, and the interesting quantized capacitance charging behaviors were observed. |
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