← Back to Search
Reversible Sidewall Osmylation Of Individual Carbon Nanotubes
Published 2003 · Materials Science
Reduce the time it takes to create your bibliography by a factor of 10 by using the world’s favourite reference manager
Time to take this seriously.
Sidewall osmylation of individual metallic single-walled carbon nanotubes has been achieved by exposing the tubes to osmium tetroxide vapor under UV photoirradiation. The covalent attachment of the osmium oxide leads to an increase in the electrical resistance by up to several orders of magnitude. The cycloaddition product can be cleaved by UV light in vacuum or under an oxygen atmosphere, whereby the original resistance is restored. Single-walled carbon nanotubes (SWCNTs), with a diameter in the nanometer scale range and a length of several micrometers, represent attractive components for nanoscale electronic devices because of their unique electronic, mechanical, and chemical properties. 1 Depending on their chirality, SWCNTs are either metallic or semiconducting nanowires. 2 It is well documented that the electronic properties of SWCNTs are sensitive to the environment, 3,4 which constitutes the basis for using nanotubes in chemical sensors. 4-6 Recently, considerable effort has been directed toward chemical modification of the nanotube sidewall by attaching organic or inorganic functional groups. 6-16 Methods for sidewall functionalization include electrochemical attachment of phenyl groups, 7a,b decoration with selenium nanoparticles, 8 covalent attachment of nitrenes, 9 fluorination, 10a-c,11a,b ozonolysis, 12a,b and noncovalent attachment of