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Assemblies of Carbon Nanotubes and Unencapsulated Sub‐10‐nm Gold Nanoparticles
Author(s) -
Hang Qingling,
Maschmann Matthew R.,
Fisher Timothy S.,
Janes David B.
Publication year - 2007
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200600703
Subject(s) - carbon nanotube , materials science , nanoparticle , nanotechnology , chemical vapor deposition , colloidal gold , nanoscopic scale , evaporation , silicon nitride , silicon , chemical engineering , layer (electronics) , optoelectronics , physics , engineering , thermodynamics
Abstract The development of assemblies consisting of unencapsulated, sub‐10‐nm gold particles attached to individual carbon nanotubes (CNTs) with diameters of 2 nm is described. The assemblies are formed on the surface of a porous anodic alumina (PAA) template on which the CNTs (single‐ or double‐walled) are grown by plasma‐enhanced chemical vapor deposition. The Au nanoparticles are formed through an indirect evaporation technique using a silicon nitride membrane mask, and diffuse along the PAA surface into the regions containing CNTs. The nanoparticles bind relatively strongly to the CNTs, as indicated by observations of nanoparticles that are suspended over pores or that move along with the CNTs. This approach may provide a new method to functionalize CNTs for chemical or biological sensing and fundamental studies of nanoscale contacts to CNTs.