Spontaneous Ag-Nanoparticle Growth at Single-Walled Carbon Nanotube Defect Sites: A Tool forIn SituGeneration of SERS Substrate | Zendy

Jason Maley | Zendy; G. Schatte | Zendy; Jianfeng Yang | Zendy; Ramaswami Sammynaiken | Zendy

Open Access

Spontaneous Ag-Nanoparticle Growth at Single-Walled Carbon Nanotube Defect Sites: A Tool forIn SituGeneration of SERS Substrate

Author(s) -

Jason Maley,

G. Schatte,

Jianfeng Yang,

Ramaswami Sammynaiken

Publication year - 2011

Publication title -

journal of nanotechnology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.347

H-Index - 29

eISSN - 1687-9511

pISSN - 1687-9503

DOI - 10.1155/2011/408151

Subject(s) - carbon nanotube , materials science , raman spectroscopy , nanoparticle , substrate (aquarium) , nanotechnology , carbon fibers , chemical engineering , in situ , composite material , optics , composite number , organic chemistry , oceanography , physics , engineering , geology , chemistry

Silver nanoparticles were spontaneously formed on pristine and oxidized single-wall nanotubes. Nanoparticles were observed on carbon nanotubes with AFM, and the presence of Ag nanoparticles were confirmed by ESR experiments. Raman spectroscopy of the Ag-treated carbon nanotubes had a 4–10X enhancement of intensity compared to untreated carbon nanotubes. Ag nanoparticles formed at defect sites on the CNT surface, where free electrons located at the defect sites reduced Ag+ to Ag. A mechanism for the propagation of the nanoparticles is through a continual negative charge generation on the nanoparticle by electron transfer from doublet oxygen (O2−)

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