Rectifying diodes from asymmetrically functionalized single-wall carbon nanotubes.
Asymmetrically functionalized single-wall carbon nanotubes (SWNTs) have been prepared by a covalent reaction of an 11-mercaptoundecanol-modified Au surface with oxidized SWNT cylinders. While one end of the tubes is attached to gold substrate via ester groups, the free carboxylic substituents on the other end can be either ionized (CO2-) or esterified (CO2Et), creating a donor-acceptor asymmetric and acceptor-acceptor symmetric SWNT, respectively. Study of the SWNT monolayer conductance in Hg drop junction experiments reveals a pronounced diode-like behavior for donor-SWNT-acceptor junctions, while acceptor-SWNT-acceptor junctions are electrically symmetric.
Wei
Zhong
Z
Centre Energie, Materiaux et Telecommunications, Institut National de la Recherche Scientifique, 1650 Bd. Lionel-Boulet, Varennes, Qc, Canada J3X 1S2.
Kondratenko
Mykola
M
Dao
Lê H
LH
Perepichka
Dmitrii F
DF
D004553:Electric Conductivity; D004566:Electrodes; D008628:Mercury / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013438:Sulfhydryl Compounds / Q000737:chemistry
D037742:Nanotubes, Carbon; D013438:Sulfhydryl Compounds; D008628:Mercury